Agricultural Bearing is a special bearing

Agricultural Bearing is a special bearing, because its structure is very special, bore cylindrical, square, hexagonal; the outer diameter of cylindrical, spherical, cylindrical mixing spherical shape. Some bearings also with square or round holes punching bearing, this bearing can simplify the main body, but also easy bearing installation and removal. Agricultural Bearings ring structure is very special, is a rubber lip curling sheet steel skeleton three large amount of interference contact seals. It can block the external bearing soil, the water enters the sand, but also to prevent the loss, sealing performance inside the bearing grease well.

A special bearing-Agricultural Bearings

We are a professional bearing manufacturer in the world. Established in 2000, has been specializing in bearings' design, production, sales, marketing and service. For 13 years experiences, our bearings have flied to USA, Europe, Middle East, Asia and Africa.Today introduced a special bearing-Agricultural Bearing is widely used in special sealed bearing on the domestic and foreign agricultural machinery. It is based disc plow, disc harrows and other farming machinery transfer load, farming in muddy water easily enters the bearing, the working shaft Equidistant installation (harrow plow shaft or axis) on multiple sets of bearings and other characteristics, designed a good sealing performance, good aligning performance, large carrying capacity, easy installation and removal of the bearings.

agricultural bearings

The bearings are machinery and equipment integral to key components, and precision spindle bearings precision more direct impact on the level of precision machinery and equipment, the type of bearing load should be considered approximate size, orientation, whether there is impact, high and low speed, aligning requirements , allow space and other factors many categories of agricultural machinery, the general situation is poor working conditions, especially in the field to do business like bad, so select the type of bearing heavy important, it directly affects the reliability of the work machine. Accuracy, we do not need as demanding as precision machinery, which is the nature of the job determines the agricultural bearings.

Crane bearing applications

Crane is in a certain range of vertical lifting and carrying heavy loads of multi-level action lifting machinery. Also known as crane. Belongs to the material handling machinery, but also for marine crane bearing, working characteristics of the crane is to do a batch Appropriate institutional movement, that in a work cycle Reclaimer, transport, unloading and other movements are alternately work Development and use of cranes on the market more widely. Crane hoisting mechanism includes running mechanism, luffing mechanism, slewing mechanism and metal structure. Hoisting mechanism is the basic working mechanism of the crane, mostly by hanging systems and winches composition, but also lift weights by the hydraulic system. Operational mechanism for horizontal transport of heavy or longitudinal adjustment of the position of the crane work, usually consists of motor, reducer, brake and wheel components. Luffing mechanism is equipped with only the jib crane, when the jib looked amplitude decreases, the amplitude increases when bent, sub balanced and unbalanced luffing luffing two. Boom slewing mechanism for causing rotation is determined by the drive means and the rotary bearing device component. Metal structure is the skeleton of a crane, the main carrier such as bridge, jib and mast can be a box-shaped structure or truss structure,But also for the web structure, and some can be used as a steel support beam.

Single row crossed roller slewing bearing material

Under normal circumstances, angular contact bearing slewing ring rolling with the overall hardening of high carbon chromium bearing steel. Slewing ring is hardened steel, when the user does not have special requirements, generally used in 50MN steel, but sometimes in order to meet the needs of specific applications, and in the host, the surface can also be in accordance with other brands under certain conditions,Excavator Slewing Bearing the use of use to provide hardened steel. Wheel bearing retainer having a monolithic, segmentation, isolated blocks and other structures. Where the overall style and segmented cage with 20 ZL102 cast steel or aluminum. Isolation block polyamide resin 1010, ZL102 aluminum casting and other manufacturing. In recent years, with the development of a continuous industrial materials are segmented cage design applications.

Slewing ring in the real industrial applications is very broad

Slewing ring in the real industrial applications is very broad, known as: "the machine joints", its main application is widely used: Truck cranes, railway cranes, port cranes, angular contact bearing marine cranes, metallurgical cranes, container cranes, excavators , filling machines, as well as CT machine standing wave treatment, navigation instruments, radar antenna base, missile launchers, tanks, robots and a revolving restaurant, and so on.Slewing widely used construction machinery is slewing initial applications are most widely used in places such as earthmoving machinery, excavators, disintegration machine, stacker reclaimer, graders, rollers excavator slewing bearing , compaction machines, drilling machines, boring machines.thin section bearing Others include:Concrete: Concrete pump truck, concrete mixing machine boom, belt fabric machineFeeding machines: disc feeder, 

Calculation and analysis of high-speed precision spindle bearing thermal properties

Bearing frictional torque, the higher the speed, the frictional heat generated by the more, the higher the temperature rise of the bearing, the bearing for the high speed bearing (dn values in the range of 2,000,000) the use of oil-air lubrication can be well suppressed bearings the temperature rise. For the friction torque and friction heat precision spindle bearings, the greater torque, bearing fever mainly related with the friction torque. Frictional heat generated by the more. According to the formula derived Palmgren, the bearing friction torque has two parts: frictional torque occurring lubricant viscosity and friction torque and speed independent of load occurs.

Buy agricultural machinery bearings

Bearing is the rotating shaft of various mechanical or moving parts of the support member, it is widely used in farm vehicles, tractors, diesel engines, motors, threshers and other agricultural machinery (agricultural bearings). Optional bearing common bearing code, but bearing the code more complicated, if agricultural hand grasp bearing identification code of law, the purchase is easy. Bearings are some of the commonly used standard model, code-named "0", the tolerance level is "G" (ordinary level), the general bearing of the first paragraph can not write, so its more than seven-digit code representing the basic code. Optional bearing multiple reference bearing diameter, bearing diameter in the basic code with the right end of the first, second digit indicates. Sub-standard and non-standard bearing bore diameter, the difference is not an integer or a non-standard inner diameter of an integer multiple of 5.

And automotive industries as well as other industries

And automotive industries as well as other industries, bearing manufacturer requires the same precision as the bearing supplier to provide a more simple, modular components to reduce errors and time factory assembled, reducing rework rates, thereby improving L efficiency and reduce costs. In order to meet this demand, the main roller support bearings manufacturer provides higher accuracy, installation, maintenance more simple drum support unit. As Luoyang Huayang has developed three row roller slewing bearing. This bearing unit is integrated bearings and eccentric, not only has a supporting role in the drum, and to achieve the pressure roller clutch and registration functions. Its superiority has been widely accepted by printer manufacturers. In the old model of modification work, this has become the preferred three-ring bearings. There is no in performance, installation, maintenance than the bearing unit better solution. And its labyrinth seal and cylindrical roller use, it can be carried out oil lubrication, it can also be greased, and maintenance-free life. Excellent lubricity also makes this the longest bearing life in various scenarios. It allows the printer manufacturer accuracy requirements from its own processing, installation of the production line moved to the production of bearings and other precision products bearing production line. This is also in line with modern intensive industry. Above all kinds of solutions to printer main drum support

Thin wall bearing requirements

For the sealing thin wall bearings, production has to fill in the appropriate grease, the host is set to open sealed to prevent grease leakage. Too little attention to the fat content, can easily lead to a lack of fat or dry friction, affect life expectancy. Oil will lead to Excessive temperature rise. Grease large spills, not only pollute the environment, and waste. Therefore, under the premise of the amount into the thin wall bearing grease sealed bearing better, in order to ensure sufficient lubrication. Lubrication Friction: friction resistance to mechanical part on the film surface. Cooling temperature: heat away by oil circulation, prevent sintering. Clean: other material through the flow of oil, clean work surface friction parts and metal production. Leak-proof seal: reducing gas Leaking and external contaminants. Corrosion: can be adsorbed on the surface to prevent water, air, acids, gases and contact area. Buffer: a sharp rise in the engine cylinder pressure, a sudden increase of pistons, piston pins, connecting rods and Oil on the crankshaft can withstand shock loads cushion the load.

Agricultural Bearing

Agricultural Bearing is widely used in special sealed ball bearings on the domestic and foreign agricultural machinery. It is based on a disc plows, disc harrows and other farming machinery transfer load, farming in muddy water easily enters the bearing, equidistant install multiple sets of bearings and other characteristics of the working shaft (harrow plow shaft or axis), and specially designed good sealing performance, good aligning performance, large carrying capacity, easy installation and removal of the bearings. Used bearing structure is very special, bore cylindrical, square, hexagonal; the outer diameter of cylindrical(cylindrical roller bearings), spherical, cylindrical mixing spherical shape. Some bearings also with square or round holes punching bearing, this bearing can simplify the host structure, but also to facilitate bearing installation and removal.Agricultural Bearing ring structure is very special, is a rubber lip curling sheet steel skeleton three large amount of interference contact seals. It can block the external bearing soil, the water enters the sand, but also to prevent the loss, sealing performance inside the bearing grease well.

Luoyang Huayang major bearing Manufacturing Co., Ltd.

Luoyang Huayang major bearing Manufacturing Co., Ltd. is able to process Φ400-Φ6000 wheel bearings / slewing ring, comprising: a single row four point contact ball bearing turntable, single row cross roller wheel bearings, double row slewing bearings, three-row cylindrical roller wheel bearings, ball-roller combination slewing bearings, flange turntable bearings, split bearings, rolling mill bearings, wind power bearings, radar bearings, deep groove ball bearings, cylindrical roller bearings, spherical roller bearings, angular contact ball bearings, tapered roller bearings, thrust ball bearings, thrust roller bearings and other products bearing the production and processing. Wherein the bearing indicate processing is the key, paper bearing surface processing methods discuss major considerations. To consider the economic precision, should choose their economies will be able to meet the economic precision machining methods. Any processing method can achieve machining accuracy and surface roughness has a considerable range, only within a certain range is narrower economy, this range is the economic accuracy. To consider the nature of the workpiece material; machining hardened steel should be used as grinding, and grinding non-ferrous metals due to the difficulty, we should adopt the diamond milling and other processing methods or fine car. Crossed roller bearings to consider the structure and size of the workpiece; such as holes on the box should adopt boring or reaming, should not be used to pull or mill. Large aperture should use boring, small aperture should use hinges.

rolling bearing Uses

Rolling bearing abbreviation bearings, mechanical appliances widely used for industrial and civilian, demanding supporting base member, known as mechanical joints. It can be said as long as the rotation where there bearing, because of the wide range determines the diversity and complexity of the bearing varieties. Due to strict requirements, determine the importance of bearing quality and performance. Overall, industry, agriculture, national defense, science and technology and civil instruments (such as your computer CD-ROM, hard drives and
automobile), and other various fields bearing host has used its precision, performance, longevity, reliability, and various economic indicators, It is closely linked with the bearing and the bearing industry and also on the development of the export capacity of major technical equipment and machinery and equipment manufacturing level. bearing in the national economy and national defense construction are playing an increasingly important role.

Flange Slewing Bearing Example: NTN LH series of self-aligning roller bearings

Self-aligning bearing applications gradually increased, especially in high-temperature environments and long life bearings. For different application environments, NTN engineers developed STJ2 steel high precision ball bearings type, in a wide temperature range from room temperature to extend the life of the temperature range of 250 ℃. This steel is LH series of self-aligning roller bearings standard materials. This bearing characteristics are as follows (compared with the SUJ2 of) a large temperature range and long life bearings, at room temperature is 3.5 times the normal life of the material at high temperature (250 ℃) under 30 times the life of ordinary materials to prevent surface damage, 7 dimensional stability under times of anti-flaking capacity, 1.4 times the capacity of anti-abrasion, 2.5 times the anti-wear capabilities, high temperature conditions, almost no change in size at 250 ℃, strengthen rupture fatigue strength at high temperatures and tight fit under the circumstances, a 2-fold increase in anti-fatigue cracking life. 2-fold increase fatigue strength ripstop, simplify storage Thin section bearings management program parts, from room temperature to 250 ℃ can use a single standard bearing type, self-aligning roller bearings will gradually turn into "LH series."

Needle Roller Bearing Features

With thin and long needle bearing roller (roller diameter D≤5mm, L / D≥2.5, L for roller length), so compact radial structure, the diameter size and load capacity are the same with other Slewing drives types of bearings , minimum diameter, especially for radial bearing mounting dimensions restricted results. Depending on different occasions, can be used without an inner ring of the bearing or needle roller and cage assemblies, then journal surface and the surface of the bearing shell holes to match directly as the bearing outer rolling surface, to ensure the load capacity taper roller bearing and operational performance there are rings with the same bearing, shaft or housing bore raceway surface hardness, machining accuracy and surface quality should be similar roller bearing rings. Such bearings can only bear radial load.

Full complement cylindrical roller bearing

Full complement cylindrical roller bearing to withstand heavy loads and design. In the same breadth, the bearings and traditional bearings with cage, compared with a high load carrying capacity, small radial section, you can save space, but the speed is relatively low. To make bearings work, in the case of continuous operation, the bearings must bear a certain minimum load, namely C / P <25. Otherwise it will aggravate frayed due to lack of lubrication and high-speed operation. All high precision ball bearings in the outer ring has a lubrication groove and lubrication holes.

Cylindrical roller bearings

Rolling body is a cylindrical roller rolling bearing to the heart. Full complement cylindrical roller bearings The internal structure of the roller was 90 ° perpendicular cross arrangement, fitted between the roller holder spacing or isolation block, the police can prevent mutual grinding between rollers or roller inclination, effectively preventing the rotational torqueIt increases. Cylindrical roller and the raceway is in line contact bearings, large load capacity, the main radial load. Rolling ring wall friction small, suitable for high-speed rotation. Cylindrical roller bearings selection quick and easy selection encyclopedia provides superior automation, synthetic fixed radial load load load from a local ring raceway fixing ring exposed, and transferred to the corresponding shaft or bearing local. This load is characterized by a relatively static radial load vector synthesis and ring.

Rolling tower crane installation considerations

Rolling tower crane installation should pay attention to:
1. Check the Rolling bearing fine mounting site includes a shaft shoulder, shoulder and other housing bore>, there must be no scratches, rust, dust and burrs.
2. With an appropriate degree. Fit is too loose, it may accelerate joint wear and tear; with tight will cause difficult to remove, damage the bearing inner and outer.
3. The upper and lower surface of the housing binning gap is not too large, so as not to damage the rolling bearing cap.
4. The journal and the bearing hole of the gear unit housing should be coated with a layer of oil.
5. Rolling must be unsealed before the provisional assembly, to put some gasoline in immersion. After washing, cool on the shelves, and underneath it a clean sheet.
6. press-fit bearings using screw jack is appropriate, you must use the hammer, use a brass rod or dowel padded brass and percussion should be uniform along the bearing sleeve around, so as not to deflect.
7. allowed by ball or cone column force transmission can not be hammering within the installation sleeve jacket, when you install the jacket sleeve inner hammering may not, in order to avoid damage to the bearings.
8. When the gear mounted on the shaft bearings, bearing should first hanging in an oil bath heated to 80-90 degrees Celsius. Upon heating, the bearing surface shall be in contact with the oil pelvic floor or walls.
9. Assembly, Wu Shi Rolling close to the shoulder, or by adjusting the pad abutting shoulder.
10. make the ball jammed on the runway at the same time as the shaft and the shaft hole installation housing bearings, it must be used in a special hose spigot and dedicated soft copper cushions, while the outer collar force.

Gears and bearings

Tooth gear referred to, is one for each raised portion engages the gear, which raised portions are generally radially aligned, paired gear tooth contact with each other on the continued engagement of the gear can operate. Gear is capable of engaging each other toothed mechanical parts, to the fixed circumferential gear is fixed by linkage, and the main function is to support the mechanical bearing a rotating body, reducing its coefficient of friction during movement, and to ensure the accuracy of its rotation, circumferential bearing is to rely on the tightness or a friction fit to secure the bearing axially fixed by the outer ring, the inner ring, rolling elements and cage four parts to fix.

Buy agricultural machinery bearings

Bearing is the rotating bearings shaft of various mechanical or moving parts of the support member, it is widely used in farm vehicles, tractors, diesel engines, motors, threshers and other farm machinery bearings. Optional bearing common bearing code, but bearing the code more complicated, if agricultural hand grasp bearing identification code of law, the purchase is easy. Bearings are some of the commonly used standard model, code-named "0", the tolerance level is "G" (ordinary level), the general bearing of the first paragraph can not write, so its more than seven-digit code representing the basic code. To illustrate the meaning of bearing code: 7002136 cases (135 series diesel engine main shaft bearing), its basic code from right to left to identify. "36" two-digit internal light, which is calculated as 36 × 5 = 180 mm; "1" diameter series special light; "2" indicates the type of cylindrical roller bearings; "00" indicates the bearing structure in the form of an outer ring without ribs; "7" denotes the width of a narrow range. If the optional seven-digit code to other standard types of bearings and so on.Optional bearing multiple reference bearing diameter, bearing diameter in the basic code with the right end of the first, second digit indicates. Sub-standard and non-standard bearing bore diameter, the difference is not an integer or a non-standard inner diameter of an integer multiple of 5.

Application of miniature bearing

four point contact ball slewing bearing are suitable for all kinds of industrial equipment,small rotary motor offshore crane bearing low noise field, such as,Office equipment, micro motor, instrument, laser engraving, small clock, soft drive, pressure rotor, dental drill, the hard disk motor, stepping motor, VCR drum, toys, computer cooling fan, currency-counting machine, fax machine and so on related field.

The big three models of flange bearings

Since flange bearing are designed to increase  accuracy of position, there are thousands and hundreds models availability.Each designed for applicability of particular ball bearing functions and requirements.
When selecting a high speed bearing, the dimensions should suit the diameter of the shaft, and they are thus available in a myriad of sizes. The largest differentiating factor between flange bearings is the number of bolts (mounting holes) on the mechanism.

Double-bolt flanges
These flanges are available either in a wing-shape or in a diamond shape, which have two mounting holes, (usually elongated for simple, user-friendly adjustment). They are engineered to be repositioned and aligned for the best fit of shaft
Three-bolt flanges,these flanges are round, which have three equidistant mounting holes.
They are engineered to be repositioned and aligned for the best fit of shaft.

Motion mechanism of flange bearing

metallurgical bearing especially engineered to provide a precise mounting fit for ball bearing,which executed through axial location of the bearings' shaft ends, stabilizing the position of bearings and consequently maximizing the load support. When utilizing a conical bearing where the shaft axis is perpendicular to the mount, flange bearing facilitate rotary or linear movement.
There are many kinds of flanges, whose designs and  cages are engineered to suit their corresponding ball bearings. in order to optimize their loading and speed capacities, allow the two devices to function in accordance. The flange bearing is screwed in relation to the shaft axis. Thus the mechanism is comprised of an insert attached to a relatively flat housing structure.
Flange bearing is usually equipped with  easily install spherical ball that offers a pivoting angle so as to relieve misalignment. The characters of bearing are  highly sturdy, maintenance-free, dirt-resistant, water-resistant, and able to adapt to an array of room temperatures.

LYHY miniature ball bearing

A ball bearing can be highly effective at reducing friction between two parts that need to move freely. There is some elasticity to the ball allowing it to support and move a range of rolling mill bearing.
Naturally, the balls in such bearings come in a variety of different sizes, from fairly large to miniature. Small Bearings can be extremely useful in applications where space is limited, such as automotive, electrical  and medical devices.
double direction thrust ball bearing afford you wide variety of miniature bearings means that you are certain to find just the bearings you are looking for. Use the bearings search fields to find the bearings you need. Search by bearings size according to inch or metric measurement and by inside diameter size and outside diameter size.

The failure reason of miniature bearings

The failure of the ball in the single direction thrust ball bearing in about 40% are caused by dust, dirt, debris pollution and corrosion. Pollution is usually caused by incorrect use and poor use environment, it also causes torque and noise problems.
slewing bearing manufacturer produced by the environment and pollution of the failure can be prevented, and observed by the naked eye is simple can determine the production of this kind of failure reason. As long as the use and reasonable installation, denudation of miniature bearing is easy to avoid. Erosion is characterized in miniature bearing ring raceway on the left indentation produced by impact load or incorrect installation.

Erosion is usually occurs in the load exceeds the yield limit of material. If not installed correctly so that a load across the miniature bearing ring will produce erosion. Miniature bearing ring on the pressure pit will produce noise, vibration and the additional torque.

four point contact ball slewing bearing the introduction

China is the world's one of the earlier invention of four point contact ball slewing bearing, in ancient books in China, there is a record of earlier about the structure of the axle bearing. Seen from archaeological objects and data, China's oldest bearing with modern rolling bearing structure shape, appeared in the 221 ~ 207 BC, the qin dynasty) this permanent economic county in Shanxi Province cliff village, xue family. After the founding of new China, especially since the 1970 s, under the strong push of reform and opening to the outside, the bearing industry has entered a brand new high quality rapid development period.

In the late 17th century, British c. tile design and manufacture of miniature linear bearings, and in a coach on the trial and the p. worth taken out a patent on ball bearings. In Germany at the end of the eighteenth century H.R. Hertz published papers about the ball bearing contact stress. In Hertz achievement, on the basis of Germany's r. a. terry baker, Sweden PAM glen and others A lot of tests have been carried out, to develop the design of the rolling bearing theory and fatigue life calculation. Subsequently, the Russian N.P. petrov Newton's law of viscosity are used to calculate the bearing friction.

Britain's o. Renault mathematical analyses of thor's findings, the Reynolds equation is derived, from then on, laid the foundation of hydrodynamic pressure lubrication theory. Early forms of linear motion bearings, is a row under the pry plate placed a row of wooden poles. This technique may can be traced back to build the great pyramid of giza, while no clear evidence. Modern linear motion bearings is using the same principle, but sometimes a ball instead of roller. The earliest of sliding and rolling element bearing is made of wood. Ceramic or glass, sapphire, also have use, steel, copper and other metals, plastics, such as nylon, bakelite, fluoro lung and UHMWPE) have been widely used.

mobile crane bearing

mobile crane bearing is fixed in the process of mechanical transmission parts and reduce the load coefficient of friction. In other words, while other parts to each other on the shaft relative motion, is used to reduce the coefficient of friction in the process of power transfer and keep the shaft center position fixed part. thin wall bearings is a kind of important modern machinery and equipment parts. Its main function is to support the mechanical body of revolution, to reduce the equipment in the mechanical load coefficient of friction in the process of transmission. By the frictional properties of motion elements, bearing can be divided into two categories, the rolling bearing and sliding bearing

Select the precision spindle bearing materials

For the study of material, Mr. Ye Jun: due to the requirements of machine tool precision spindle bearings with high precision, high speed, high reliability, there are some special requirements on the material, material using high quality refined steel rings, there are special steel abroad. Cage materials are copper, plastic, special self lubricating material. rolling mill bearing steel, ceramic materials.

High performance development of precision spindle bearings

Mr. Ye Jun said that, as a key basic parts, machine tool precision spindle bearings are the foundation to guarantee the machining accuracy index of machine tool. With the development of modern machine tools to the development of high precision, high speed, high reliability direction, put forward higher request to the spindle bearings.

  As in the traditional mechanical or general machinery, mainly in the hundreds to thousands of speed r / min/ agricultural bearings , while the modern high-speed processing machine, spindle speed required to reach tens of thousands to ten revolutions per minute. In the bearing industry, said the speed performance with dmN value, it is a product of the diameter and the speed of the machine tool spindle, the index is generally less than 2 million, the highest of 4 million, require very high.

  Therefore, bearing on the design requirements, with angular contact ball bearing as an example,marine crane bearing from material selection, structure design, guide way design, lubrication, groove curvature coefficient selection and other aspects needed for spindle requirements analysis, research.

Stringent requirements for precision bearings under the development of high speed spindle

High speed spindle bearing is particularly important, especially in order to meet the increasing requirement of processing speed, the development of high speed bearing spindle including electric spindle, and continuous improvement, more and the requirement of high speed of spindle bearing higher.

  If the agricultural bearings are not good,it will be very serious rise of spindle system temperature, and even burned failure.

The selection of super precision bearings P4 and above level

Mr. Chen Shiwei said that the radial spindle bearing beating, face runout, rolling body diameter inconsistent form and position error will affect the spindle system and its processing accuracy of parts is serious, so the accuracy of precision machine tool spindle bearing for the P5 and the superior, but for the spindle bearing of CNC machine tools, machining center and so on high speed and high precision machine tool and you need to use P4 and above level super precision bearings .

Design features of machine tool precision spindle bearings

In recent years, the performance of the machine tool spindle further to the high speed bearing , high precision, high stiffness and the direction of development. To meet these requirements at the same time,it also must be conducive to environmental protection and pay attention to global warming and other environmental issues.

  Special design, Mr. Yu Jiong said, bearing design NSK (LYHY precision spindle bearings peer)as the core to tribology, rely on four core technology of Tribology (evaluation of analytical technology, technology, lubrication technology and material technology).

  For the design of machine tool spindle bearing is even more so, first of all, NSK to use its technology to develop a bearing material of long life, high performance.

  Secondly, the design of the rolling body, we developed in high speed and ultra high speed environment, various aspects of ceramic material with excellent performance, effectively realizes the rotation for ultra high speed, ultra high precision metal rolling body cannot reach, won the overwhelming majority of users.

  In addition, NSK (LYHY precision spindle bearing peer)development and design of special shape rolling body guide resin retainer with grease, running in a short time, temperature stability, low friction, low noise, especially can play a better effect in grease lubrication conditions, while for the roller and precision cylindrical Full complement cylindrical roller bearings ,it is ultra high performance PPS and PEEK resin material, has the advantages of high speed and heat resistance is more superior.

TAC precision spindle bearing type composition

TAC spindle bearing type cases, 30TAC62BDDGSUC10PN7BWPHL
Nominal bearing inner diameter, 30
Bearing type code, TAC
Nominal diameter of the bearing, 62
Internal form code, B
Sealing ring code, DDG
Combination form code, SU
Preload code, C10
Precision code, PN7B
Grease the code, WPHL( Angular contact ball bearings )

TAC series of precision spindle bearing material

TAC series bearing（precision spindle bearings） of this brand are made of EP steel, the outstanding characteristic of having long life. EP steel NSK development with the characteristics of high purity, long life, high reliability, the rolling contact fatigue life is 3 times the average of SUJ2 bearing steel.

  LYHY agricultural bearings have been done in this area a lot of effort.TAC series of bearings adopt high dustproof light contact sealing ring, improve the reliability of. TAC series of marine crane bearing with light contact their independent development of the sealing ring is excellent, high speed, small temperature rise, high reliability.

TAC series of precision spindle bearing products

• Types of TAC series of bearing products,as more as LYHY precision spindle bearings

• TAC series of open bearing( Linear Motion Bearings ) diameter range 15 to 60mm

TAC series of sealed bearings（ marine crane bearing ）, high dust, light contact seal with sealing lip shape design special,which has been widely used in the automobile generator. Bearing inner diameter range 15一45mm.

TAC series of precision spindle bearing specialty

1.high performance design.

High Rigidity, ball number 600, contact angle, high stiffness.
Long Life, with EP steel long life, high reliability, service life is 3 times that of ordinary bearing( precision spindle bearings ) steel SUJ2.

2.
Contact sealed bearing series, high reliability, high dust
Sealed bearing dustproof performance is good, not easy leakage of lubricating grease. And the use of light contact seal ring,low bearing torque and fever.

3.installation convenience( marine crane bearing )

Open Bearing,provide has been filling grease products, shorten the installation time.

Sealed Bearing, has been filled with grease, and the back and front of the sealing rings of different colors, easy to identify the direction .

  Ball screw support contact ball bearing type series for thrust angle, sealed bearing series.

TAC series of precision spindle bearing

TAC series of bearings is  the ball screw support angular contact thrust ball bearing（ angular contact ball bearing ） under a brand of LYHY marine crane bearing peer , TAC series of bearings （agricultural bearings） include open bearing series, sealed bearing series.

TAC series  ball screw special bearing with high rigidity, high performance
and model complete, a wide range of uses,increase the sealing type series.

The spindle bearing parameter results

• Operation performance is better than that of ceramic ball bearing has the advantages of full steel bearing, the positioning preload more fully embodied, the speed limit of all steel bearings and ceramic ball bearing 4; n value, positioning preload were 1 X10 and 6.4 XIO 'bucket', fixed pressure preload were 2.4 XIO 'XIO', and 3.4 fixed pressure preload, ceramic ball bearing stiffness is greater than all steel bearings, and the positioning of preload on the contrary.

• In general, the angular contact ball bearings inner ring of the highest temperature, lowest temperature, the outer ring, but the constant preload - Factory rotate speed reaches to a certain value, the temperature may be higher than the inner ring outer ring.

• Measurement of  precision spindle bearings translational inherent frequency and the radial stiffness value and calculated value is consistent, ignore W1) d influence the measurement value is less than the calculated value, indicates that the theoretical analysis is correct. 

Experimental verification of spindle bearing

Through the theoretical analysis of spindle bearing , the results show that,

1) friction heat and pre tightening mode influence the speed and the dynamic performance of the bearing is very significant, bearing the quasi dynamic analysis to consider the friction heat and pretension.

  Methods influence the accuracy of computation is improved obviously, the results accord with the actual, friction heat and inertia effect of high speed increases the speed reduction bearing.
  And the dynamic performance of fixed pressure preload, the influence is less than positioning pretension, speed performance is better than the positioning pretension, preload for high speed.

2) using single flange bearing outer ring structure of low temperature than a double wall temperature, effect of ball number on the bearing temperature is small, the ball diameter and the initial contact angle increases raising the temperature, compared the positioning preload, fixed pressure preload more obvious; two pre tightening mode, ball diameter increases and the increase of the number of the linear ball bearing stiffness,effect of ball number increases, more than the ball diameter, the radial stiffness decreased the initial contact angle increases, the axial and angular stiffness increases, but the fixed pressure
preload, the axial and angular diameter increased stiffness decreases with increasing the initial contact angle can improve the axial and angular stiffness.

Spindle bearing relevant study

• Bearing stiffness analysis and measurement, application of Hertz contact theory, establish the formulations for calculating the stiffness of precision spindle bearings, bearing stiffness characteristic analysis and example calculation, measurement and processing computer system of vibration, vibration feature extraction of signals, the measurement of the stiffness of the bearing.

• Dynamics analysis of spindle units,according to the theory of vibration, the application of the finite difference method and the finite element method, the dynamic characteristics of spindle slewing drives is analyzed, and an example of calculation.

• To calculate the minimum preload, put forward the minimum preload bearing calculation criteria, and an example of calculation.

• Bearing speed experimental study, effects of test to bearing structure and lubrication parameters on the performance of speed.

Study on the thermal characteristics of spindle bearings

The friction heat of spindle bearings significantly influence the speed and the dynamic performance of the precision spindle bearings unit, is restricting the main factors to improve the machining efficiency and precision.

  To build up the heat transfer equations, the friction heat and temperature distribution calculation of bearing, thermal characteristics research of bearing, and its impact on the speed and dynamics is an important topic with theoretical
and practical significance.

  In this paper, based on the heat transfer, tribology of spherical roller bearing and rotor dynamics as the theoretical basis,taking the GDZ48A type electric spindle as an example, establishes the spindle bearing considering the effect of friction heat and pre tightening mode quasi dynamics analysis model, analyzes the bearing friction torque, motor, load and stiffness, study the influence of thermal characteristic, agricultural bearings design and application parameters on the speed and dynamics, and validated by experiments.

spindle bearing,gricultural bearings

spindle bearing dynamics performance study  including ,
1) dynamic analysis of pseudo bearing, the establishment of improved quasi dynamics analysis method, considering the effect of friction heat and pre tightening mode, calculation of bearing load, motion, displacement, friction torque and friction heat equation.
2) calculation of bearing temperature distribution, using heat transfer theory, the establishment of the spindle unit of heat transfer model, derives the heat transfer resistance and heat transfer equation.
3) agricultural bearings operation performance calculation, the effects of example calculation and thermal characteristics, analysis of bearing design parameters and Preload Method on operation performance.

spindle bearing needi

spindle bearing needing preload is generally as angular contact ball bearings front bearing use.
angular contact ball bearing is generally used in groups, pre tightening in two ways,
1, bearing between the spacer sleeve, the top outer ring, inner ring with pressure pretightening nut.
2, at the end of main shaft side top outer ring, inner ring with a pre tightening nut pressure behind.
Methods 1 septum sleeve ends parallel precision must be very good. Mode 2, pressure ring side of the shaft is vertical to very good accuracy.
On the vertical accuracy requirements of bearing side with the thread of the locking nut is also high.
In addition, bearing must not install anti, anti loaded words bearing will be pressed powder.Note that the pre tension (or preload) must meet the requirements of bearing the instructions, otherwise it will damage the bearing.

The inner ring and shaft coordination

With the inner ring and the shaft, with no interference, no clearance of the state as the target (Line to Line). With the outer ring and the outer shell is movably matched with the hole.
Used in the same inner diameter of the casing in parallel with the double row spherical roller bearing case, outside diameter tolerance is F6, so as to be movable fit.
thrust ball bearing screw support frame for angular contact ball bearing ,as the shaft size tolerances recommended H5 as shell hole size tolerance, recommendation H6
The clearance and preload bearings
Install bearings, applying pre load appropriate to give, as the axial clearance, the regulations are as follows.
Double direction angular contact thrust ball bearing--C7 clearance
Thrust ball screw support frame for angular contact ball bearing --C10clearance

Spindle bearing and running

The running purpose is to make the bearing in the formal angle before, the roller and raceway contact through running, can have good conditions, to maintain the bearing contact with good accuracy, and avoid the damage of the bearing roller in the beginning due to high-speed and heavy haul when in use and the raceway, thereby improving the bearing  life and accuracy .

  Because the taper roller bearing is not completely rolling contact, between the shoulder and the inner roller end the existence of sliding contact, if the condition is not good, it is easy to appear the phenomenon of occlusal damage, so more attention should be paid to this kind of bearing running.

  The precision spindle bearing is the main shaft bearing of precision machine tools and similar equipment, to ensure the accuracy of its work and the use of performance of precision machine tool.

The third result of theoretical analysis of spindle bearings

The preload increases the temperature of the bearing and the stiffness will increase slightly, the fixed pressure preload, preload should increase with the rotational speed, the  marine crane bearing load and torque increases, positioning preload, the ambient temperature is high, the temperature rise of Vietnam, fixed pressure preload on the contrary.

  Oil mist lubrication, lubricating oil supply dose effect and viscosity and gas pressure bearing temperature, lubricating properties of synthetic lubricating oil is better than mineral oil, mineral oil contains a small amount of synthetic oil lubrication performance is best, can improve the speed performance of the precision spindle bearings the correct application of parameter selection.

Spindle bearing configuration

  The correct configuration of spindle bearings is a combination of front and back bearing and bearing type layout, different configuration determines the different load capacity, machine tool spindle angular contact ball bearings, rigidity, temperature rise and the service life, especially the influence of stiffness and temperature rise is more obvious, so we should according to the work characteristic of machine tools the requirements of rational allocation of main shaft bearings.

Double direction angular contact thrust ball bearing

Range: diameter 80 mm to 600mm diameter

Precision: UP, SP, P4, P5

Dimension series: BS1747TN1 BS2047TN1

BS2562TN1 BS3062TN1

30TAC62BSUC10PN7B.

Nominal bearing contact angle of 60 degrees.

The bearing assembly preload.

High rotation accuracy

precision bearings for machine tool spindle

Spindle bearing characteristics

Slim bearing is the main shaft bearing of precision machine tools and similar equipment, to ensure the accuracy of its work and the use of performance of precision machine tool.

  Taking the NSK spindle bearing products in Japan as an example, precision spindle bearings include precision angular contact ball bearing 70 series, 719 series, 72 series, precision round The column roller bearing N10 series, NN30 series, TAC series of bearings for precision ball screw support.

Spindle bearing characteristics

High performance design.

High rigidity, Ball Number 600, contact angle, high stiffness.

Long life,EP steel with long life, high reliability, service life is 3 times that of ordinary bearing steel SUJ2.

Contact sealed bearing series,high reliability, high dust

Sealed bearing dustproof performance is good, not easy leakage of lubricating grease. And the use of light contact seal ring, bearing torque low, low fever.

Advantages and characteristics of precision spindle bearings

The spindle bearing is the main shaft bearing of precision machine tools and similar equipment, to ensure the accuracy of its work and the use of performance of precision machine tool.

  Taking the NSK spindle bearing products in Japan as an example, precision spindle bearings include precision angular contact ball bearing 70 series, 719 series, 72 series, precision round
The column roller bearing N10 series, NN30 series, TAC series of bearings for precision ball screw support.

• Spindle bearing characteristics
• High performance design.

High rigidity, Ball Number 600, contact angle, high stiffness.
Long life, EP steel with long life, high reliability, service life is 3 times that of ordinary bearing steel SUJ2.

• Contact sealed bearing series, high reliability, high dustSealed bearing dustproof performance is good, not easy leakage of lubricating grease. And the use of light contact seal ring, bearing torque low, low fever.

Brief introduction of agricultural bearings

Agricultural bearings are special sealed ball bearings which are widely used in the foreign agricultural machinery.

  It is based on the disc plough, disc harrow and other agricultural tillage machinery, farming in the transfer load slurry easy to enter the working shaft bearing inner (Plow harrow shaft or axle) equidistantly installed multi bearing characteristics, specially designed a good sealing performance, good performance in bearing, big self aligning bearing capacity , easy to install and disassemble.

  The structure of agricultural bearings is very special, the inner hole is provided with cylindrical, four square, six square; outside diameter of cylindrical, spherical, cylindrical spherical mixed form. Stamping bearing seat some bearing is also provided with a square hole or a circular hole, the bearing can simplify the host structure, installation, disassembly and easy bearing.

No bearing distance ，no progress.

In the aspect of vibration, noise and abnormal sound. Japan has launched a mute and super mute bearing, while the extreme horizontal vibration China bearing compared with Japan bearing, general is above 10dB.

  In the aspect of life and reliability. Taking the deep groove ball bearing as an example, foreign brand-name products typically live for the life calculation of more than 8 times(highest up to over 30 times), the reliability is above 98% (or pursuit and host life), and Chinese bearing life generally only for the calculation of life expectancy of 3 to 5 times, the reliability is about 96%.

  In the precision of the bearing. Domestic bearing size deviation and rotation accuracy although and imported bearings have been very close, but with the SKF bearing imports also has certain disparity in the discrete degree. Foreign countries have already begun to research and application of "non repeatable runout" rotation accuracy index of such fine, and China research in this area is still a blank.

  In the high speed bearing performance of foreign famous brand products, the DmN value of 4 by 106 mm r/min, and China bearing is only 2 by 106 mm r/min.

  No matter how long the distance is,China is always trying to keep up with the world ,and never stop.Just like LYHY bearing,one part of China bearing.