precision spindle bearings Parts cleaning process

1 forging blank checks

2 Rough

3 Rough aging

4 fine cars

5 forming fine cars

Cross, three-row worm gear speed reducer‍ roller slewing bearing inner Special Process: To prevent cross, three-row roller slewing bearing inner heat treatment after deformation. When turning the pair must be processed, i.e., the raceway back-processing precision spindle bearings, cutting is not performed before the heat treatment, heat, cut molding.

6 heat treatment

Min raceway surface hardening (sometimes customer requirements can carburizing, nitriding, carbonitriding, etc.)

After quenching and tempering treatment

7 rolling, milling and processing

8 during drilling according to customer requirements can be blue, phosphate, sulfide and other treatment

9 grinding coarse and fine grinding can be divided into two parts detection process 10.

10. demagnetization, cleaning, assembly, surface Deep groove ball bearing‍ coated with anti-rust oil, grease filling, sealing nozzle, packaging (plastic film bag inner layer, an intermediate layer of kraft paper, plastic tape wrapped nylon outer layer).

precision spindle bearings Note the plane bearing fault maintenance

A plane bearing fault feature showed a serious fault is less than a week time, large equipment, bigger, faster, the shorter time intervals. Therefore, the bearing fault diagnosis of actual, once found fault, its advanced function, should decisively determine sealed bearing‍ the precision spindle bearings  fault, repaired as soon as possible.

Selection and control 1, shaft and bearing chamber tolerance: press bearing plane bearing should be flexible rotation not block a sense of. If there is obviously the rotation is not flexible, indicates that the axial size is too large, the tolerance to cut. If the bearing onto the shaft by hand after turning has obvious "rustle" sense, the tolerances of the shaft may be too large or the roundness of the shaft is not good. So in the control of the shaft and housing tolerances to control the roundness, many domestic manufacturers only on tolerance control, no control of roundness.

2, the bearing assembly: Spherical roller bearings‍ because the bearings are precision products, such as improper assembly is easy to bearing raceway damage, cause damage to the bearing. Bearing assembly shall have the special mould, can not be beat, after pressing shaft when only small force, force pressure when only circle circle. The assembly by pneumatic or hydraulic press, the upper and lower mold to outside in the horizontal state, if tilt will cause the plane bearing raceway damage due to stress, and the bearing guide ring.

3, to prevent foreign bodies bearing assembly: easily mounted to the rotor dynamic balance when the dynamic balance of iron filings into bearing interior, so it is best to install bearing dynamic balancing. Some manufacturers in order to convenient assembly, the assembly of some oil or grease lubrication effect in the bearing chamber painted, but the operation is often difficult to control, if the oil or grease in the bearing chamber accumulates more, in the bearing rotates easily Full complement cylindrical roller bearings‍ along the shaft into the plane bearing. The bearing chamber is best not to oil or grease, such as non coated not to control may not be in the bearing chamber of accumulation.

4, rust prevention paint: paint rust is characterized by multiple sealed type motor, the motor voice in the assembly is very good, but in some time within the warehouse, the electrical noise change greatly, remove bearing with serious rust. Many manufacturers are considered to be before the bearing problem, through our advocacy, motor factory is now aware of the main insulation paint problems. This is mainly because the acidic material insulating paint volatile out of the formation of corrosive substances under certain temperature, humidity, the plane bearing groove corrosion cause bearing damage. The problem can only be good choice of insulating varnish, and after drying ventilation for a period of time after the assembly.

We should arouse our vigilance bearing assembly in the defects thin wall bearings‍ and other countries, failure is often very fast, very suddenly. That is after two hours, examples of this digital measurement of rotor shaft end.

marine crane bearing Some key points of maintenance and detection of bearingwind power bearing

1, in the use of the bearing process, regular cleaning is very important. How accurate cleaning bearings? First remove the bearings when the five, first with photography and other methods appearance record. In addition, to confirm that the remaining amount of lubricant and wind power bearing‍ lubricant sampling, and then marine crane bearing.

2 bearing cleaning, rough cleaning and washing suspension, and metal frame use the bottom of the container placed on.

3, rough when washing, in oil use brush Su Qingrun grease or adhesions. If the oil migration shift bearing, note blend due to foreign Thrust Roller Bearings‍ bodies such as damage the rolling surface.

4, when sperm washing, slowly in the oil migration shift bearing, be hard to stop.

Cleaning agent 5, usually used for neutral without water diesel oil or petroleum, based on demand and sometimes the use of temperature alkaline liquid. Regardless of the use of what kind of slewing rings‍ cleaning agents, are often filtered confrontation clean.

6, immediately after cleaning, coating rust preventive oil on the bearings or antirust grease.                                             ‍

agricultural bearings characteristics of deep groove ball bearing

Deep groove ball bearing has the advantages of simple structure, compared with other types of easy to achieve high manufacturing accuracy, so easy to become series mass production, lower manufacturing costs, the use of very common. Select the radial internal clearance self aligning bearings‍ greater axial bearing capacity, under purely radial force when the contact angle is zero. The action of axial force, contact angle greater than zero. General use of the stamping cage, car solid cage, sometimes also used nylon frame. Deep groove ball bearing except basic types, there are a variety of forms, such as: deep groove ball bearings with dustproof cover; deep groove ball bearings with rubber sealing ring; deep groove ball bearings with snap groove; deep groove ball bearing a large load capacity ball gap; double deep groove ball Double Row Ball Slewing Bearing‍ bearings. But they all share the following characteristics:

Continuous groove type 1, each ring in the structure of deep groove ball bearing has a cross-section of approximately spherical perimeter 1/3 roller. It is mainly used to bear radial load, also can withstand the axial load;

2, in the bearing radial clearance increases, with the nature of angular contact ball bearing, the axial load bearing two directions alternating;

3, small friction, high speed;

4, has the advantages of simple structure, low manufacturing flanged ball bearing‍ cost, easy to manufacture high precision;

5, the general methods of stamping cage diameter greater than 200mm, the bearing or high-speed operation, the use of the car business entity retainer.                                                                                                                      ‍

precision spindle bearings The characteristics of deep groove ball bearing

Deep groove ball bearing has the advantages of simple structure, compared with other types of easy to achieve high manufacturing accuracy, so easy to become series mass production, lower manufacturing costs, the use of very common. Select the radial internal spherical roller bearing‍ clearance greater axial bearing capacity, under purely radial force when the contact angle is zero. The action of axial force, contact angle greater than zero. General use of the stamping cage, car solid cage, sometimes also used nylon frame. Deep groove ball precision spindle bearings  except basic types, there are a variety of forms, such as: deep groove ball bearings with dustproof cover; deep groove ball bearings with rubber sealing ring; deep groove ball bearings with snap groove; deep groove ball bearing a large load capacity ball Series super thin section bearings‍ gap; double deep groove ball bearings. But they all share the following characteristics:

Continuous groove type 1, each ring in the structure of deep groove ball bearing has a cross-section of approximately spherical perimeter 1/3 roller. It is mainly used to bear radial load, also can withstand the axial load;

2, in the bearing radial clearance increases, with the nature of angular contact ball bearing, the axial load bearing two directions alternating;

3, small friction, high speed;

4, has the advantages of simple structure, low manufacturing Thin section bearings‍ cost, easy to manufacture high precision;

5, the general methods of stamping cage diameter greater than 200mm, the bearing or high-speed operation, the use of the car business entity retainer.‍

marine crane bearing

Deep groove ball bearings generally consists of a pair of rings a retainer, a group of rigid ball and a group of cage, deep groove ball bearing type code 6 is most popular, the most widely used one kind of bearing, deep groove ball bearing has the advantages of simple wind power bearing‍ structure, convenient use, is the largest production volume, bearing a certain axial load. When the bearing radial clearance increased, with the function of angular contact ball bearings, can bear large axial load. ,

Deep groove ball bearings are mainly used to withstand pure radial load, also can bear radial load and axial load, when the only subject to pure radial load, the contact angle is zero. When deep groove ball bearings with a larger radial clearance, with angular contact Thin section bearings‍ marine crane bearing performance, can bear large axial load. Deep groove ball bearing friction coefficient is small, the limit speed is very high, especially in the high speed operating condition of large axial load, deep groove ball bearing thrust ball bearings are more advantages than. The other kind of bearing with the same size, such bearing small friction coefficient, high limiting speed. In high speed should not adopt the thrust ball bearings are available in case the axial load of bearing, deep groove ball bearings mounted on the shaft, the axial displacement of the shaft or housing restrictions in bearing axial clearance range. At the same time Series super thin section bearings‍ the shell, when the hole and shaft (or outer ring of the inner ring) relative to tilt, (not more than 8-16 according to play determination) can still work properly. However, that is inclined to exist, it is necessary to reduce the service life of bearing.

Compared with other types of bearings, deep groove ball bearings of the same size, friction loss, high limit speed, should not be used in high speed thrust ball bearing case, available such turntable bearings‍ bearings subjected to pure axial load. If we improve the manufacturing precision, and the bakelite, bronze, aluminum and other materials of the solid cage, the speed can also be improved.

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agricultural bearings Coordination selection

Inner diameter and outer diameter of rolling bearings are manufactured according to the standard tolerance, bearing inner ring and shaft, tolerance of slewing bearing‍ outer ring and the seat hole degree can only through tolerance and seat hole control shaft neck to achieve. With the agricultural bearings inner ring and shaft using the basic hole system, combined with the outer ring of the bearing seat hole of the shaft.

The correct choice of cooperation, must know the actual load conditions of bearing, the working temperature and other requirements, but in fact it is very difficult. Therefore, in most cases it is used according to the selection of fine grinding.

The size of load

The ring and the shaft or housing Double Row Ball Slewing Bearing‍ between the win depends on the size of the load, heavy load by win larger, lighter load by winning the smaller amount.                                                                        

precision spindle bearings Bearing use and coordination

The use of bearing

Use the matters needing attention

Rolling bearings make precision parts, and therefore requested the use of the corresponding support cautious attitude, not only changing bearing high slewing ring bearings‍ performance, if used improperly, can not achieve the expected performance, so, use of the bearing that should pay attention to the following items:

Keep the bearings and the surrounding environment clean. Even the eyes can not see the smile dirt into the bearing, also increase the precision spindle bearings‍ wear, vibration and noise.

Use the installation carefully, Other bearing‍ do not allow powerful punch, does not allow direct percussion bearing with a hammer, not allowed to pass through the rolling pressure.

Use tools appropriate, accurate, as far as possible the use of special tools, the use of fabric and fiber or something to avoid.

To prevent corrosion of bearings, the direct use of hands to take bearings, should wash hands sweat, and coated with high quality mineral oil before operation, during the rainy season Series super thin section bearings‍ and summer with particular attention to anti rust.

                                                                                

marine crane bearing The speed limit of angular contact ball bearing

Angular contact ball bearing speed increased restrictions is mainly because of the angular contact ball bearing friction fever induced by internal temperature, when the speed reaches a certain value, due to burn and cause cannot continue rotating angular contact ball bearing. The speed limit of marine crane bearing‍ angular contact ball bearing is the frictional heating does not cause burns and continuous rotation of the boundary values.

Therefore, angular contact ball bearing limit speed depends on the angular contact ball bearing type, size and accuracy and lubrication, lubricant quality, cage and type of material, loading conditions and other factors. All kinds of angular contact ball bearings with grease lubrication and oil lubrication (oil bath lubrication) speed limit when contained in the angular contact ball bearing size table, its numerical Needle Roller Bearing‍ representation standards for the design of the angular contact ball bearing under general loading conditions (C/P>=13, Fa/Fr<=0.25) limits when the rotation speed value.                                                                                   Bearing high speed rotating matters needing attention

High speed rotating note: bearing rotating at high speed, especially the speed of approach or exceed the speed limit size table records, should pay attention to the following matters:

(1) the use of precision bearing

(2) analysis of bearing internal clearance (bearing internal clearance considering temperature rise reduction)

(3) the analysis material of cage type (for high speed rotation, Taper roller bearings‍ suitable for copper alloy or phenolic resin cutting holder. There is also suitable for synthetic resin forming high-speed rotating cage)

(4) analysis of lubrication (which is suitable for lubrication of high speed rotating, spray lubrication, oil mist lubrication and oil air lubrication, lubrication).                                                                                                              ‍

agricultural bearings What is the angular contact ball bearing

Angular contact ball bearings, thrust ball bearings to the heart that is usually said, the allowable working speed and deep groove ball bearing is similar, but the support rigidity ratio of deep groove ball bearing is stronger, mainly because of the bearing steel ball is more, the radial load capacity agricultural bearings‍ than the ordinary ball bearing, but also bear large axial load or subject to pure axial load. The bearings are generally used in pairs, used for Small Span Rigid double supporting shaft or precision spindle, can improve the rigidity of the bearing system.

Can bear radial load and axial load for angular contact ball bearing. Can work at a higher speed. The larger the contact angle, the higher the axial bearing capacity. High precision and high speed bearings usually take 15 degrees contact angle. Under the action of axial force, Flange Slewing Bearing‍ contact angle increases. The axial load of single row angular contact ball bearings can bear a direction, in radial load, will cause additional axial force. The axial displacement of the bearing can limit shaft or shell in one direction. If quality.the installation, the outer ring of a bearing on the relative, the wide end of the wide face, narrow end face with narrow end. So to avoid the additional axial force, but also in the two direction of the shaft or shell limit in the axial clearance range.

Because of its inner and outer ring raceway can have relative taper roller bearing‍ displacement on the horizontal axis angular contact ball bearing, can bear radial load and axial load -- combined load (single row angular contact ball bearings can only endure single direction axial load, mounting is often adopted to them).                                                               

precision spindle bearings Non locating bearing

Non locating bearing roller bearing used in vibration. Them to press fit mounted to the shaft, eliminating the friction corrosion which may be caused by axial clearance is not tight, self-aligning bearing system can also be formed with good performance and reliability.

Toroidal roller bearings precision spindle bearings‍ can performance structure with smaller and lighter to achieve the same or better, for example in the planetary gear box. They simplify the bearing arrangement on the longitudinal axis of the larger temperature change. The use of this kind of bearing vibration are reduced, for example in the paper machine and fan. It is a long and slightly single row bearings symmetrical roller coronary. Bearing inner and outer ring raceway are concave in shape, around the bearing center symmetric distribution. Thus the best combination of raceway characteristics, load distribution in favor of bearings to reduce friction. Roller bearing with self-directed, slewing bearing‍ regardless of whether the inner ring relative to the outer ring axial displacement and / or misalignment, roller is always in a uniform load distribution on the roller length position. It's a very strong load capacity, even in has to compensate for angular misalignment or axial displacement. So, bearing layout in the operation is reliable, extended service life.

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marine crane bearing rolling bearing

The bearing arrangement includes not only the rolling bearing, but also with the bearing components related, such as the shaft and the bearing seat. A very important part of the lubricant is also bearing configuration, as lubricants to corrosion abrasion proof, so that the bearing can give full play to the role of. In addition, the seal is also a very important component, the seal performance is very important for marine crane bearing‍ lubricant clean, keep clean the bearing service life have a profound impact.

In order to design of rolling bearing configuration, need

– select the suitable bearing type and

Determine the appropriate size of the - bearing,

But this is not enough. There are several other aspects to consider:

- such as the other parts of the bearing arrangement proper form and design,

- correct fit thin wall bearings‍ and bearing internal clearance or preload,

- fixed device,

Seal - proper,

The type and dosage, lubricant, and

- installation and removal methods.

Each individual will affect the performance, reliability and economy of the bearing arrangement.

Work required depends on whether similar bearing matching experienced. In case of lack of experience, there are special requirements, or the need for bearing configuration Needle Roller Bearing‍ cost and any other subsequent appearance to give special consideration, we need to do more work, such as a more accurate calculation or test.

Selection and application of bearing.‍

precision spindle bearings Calculation of the needle roller bearing radial clearance of tone

Self-aligning roller bearing should ensure the outer spherical raceway and roller and raceway ask radial clearance at the contact line in the direction of the supporting, the radial clearance. Effect of self-aligning roller bearing radial clearance C, the main factors are: outer ring spherical Lang was D.. precision spindle bearings‍ Inner ring diameter

Distance of two roller and roller contact by diagonal ask. The maximum diameter of D and the spherical roller

What is different. Spherical roller bearings supporting the identification process, the outer ring spherical raceway diameter deviation and the inner ring two most road diagonal distance deviation measurement and centripetal bearing the general differences. Measurement of packet and Zhu spherical raceway diameter deviation is generally performed by D924, bore dial indicator instrument; measurement packets in which two rolling deviation road diagonal distance is quite difficult. There are two methods used at present: don't choose an approximate diagonal distance measurement method, another is the method of measuring diameter of roll.

Structure self-aligning roller bearing is complex, Taper roller bearings‍ many factors affect the radial clearance. Only by grouping calculation matching is not guaranteed to pass the radial internal clearance of the bearing. This kind of bearing must be clearance in the matching test for the feast. Matching efficiency can reach the higher matching ginseng powder - revised. Aligning roller on the radial travel clothes measuring bearing commonly used in removing. At present, most manufacturers use 12 measurement device. 

agricultural bearings cylindrical roller bearings

1. roller and raceway for the line of contact, radial load capacity, suitable for heavy load and shock load.

2. the friction coefficient is small, suitable for high-speed, the speed limit is close to the deep groove ball bearing.

3. N type and NU type axial moving, agricultural bearings‍ can adapt to the changes due to thermal expansion and installation error of the shaft and the casing relative position, can be used as a free end bearing.

Use. The inner or outer ring can be separated, which is convenient for installation and disassembly.                                               4. the processing requirements Spherical roller bearings‍ of shaft and hole high, bearing inner and outer ring axis relative deviation after installation must strictly control, so as to avoid the contact stress concentration. Hole with 1:12 taper double row cylindrical roller bearings. 5. radial clearance can be adjusted, radial rigidity is high, suitable for machine tool spindles.

The 3.6 cross roller bearings, cylindrical roller in a V shaped groove 90 degree roll surface through the isolated blocks are arranged vertically, so the cross roller bearings can bear radial load, axial load and torque load and multi direction load. The inner ring and the outer ring size is miniaturized, thin form is small size is close single direction thrust ball bearing‍ to the limit, and has the advantages of high rigidity, and the precision can reach P5 P4, P2. The rotary table is therefore suitable for industrial robot joint part and a rotating part, machining centers, precision equipment rotary table, medical equipment, calculators, military industry, IC manufacturing equipment etc..                                                                                                                                                   

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precision spindle bearings angular contact ball bearing

Can bear radial load and axial load, high speed, the larger the contact angle, the higher the axial bearing capacity. Single row bearings can only bear the axial load in one direction, in radial load, will cause additional axial force. The axial displacement of the bearing can limit shaft or shell in one precision spindle bearings‍ direction. If quality.the installation, the outer ring of a bearing on the relative, the wide end of the wide face, narrow end face with narrow end. So to avoid the additional axial force, but also in the two direction of the shaft or shell limit in the axial clearance range. Structural change of angular contact ball bearing as many as 70.

The 2.1 contact angle is 15 °, 25 °. 40 degrees three, the larger the contact angle of the axial bearing capacity is higher. High precision and high worm gear speed reducer‍ speed bearings usually take 15 degrees contact angle, under the action of axial force, contact angle increases. The 2.2 is the inner or outer lock, inner, outer ring can not be separated. The outer ring and the inner ring heating after expansion, the rolling body, the holder assembly. Ball number ratio of deep groove ball bearing. Rated load in ball bearings in the largest, strong rigidity, smooth operation.

marine crane bearing Cross roller bearings

1, deep groove ball bearing

Continuous groove type 1.1 structure of deep groove ball bearings on each ring has a cross-section of approximately spherical perimeter 1/3 raceway. It is mainly used to bear radial load, also can withstand the axial load.

1.2 in the bearing radial marine crane bearing‍ clearance increases, with the nature of angular contact ball bearing, the axial load bearing two directions alternating.

1.3 small friction, high speed.

1.4 has the advantages of simple structure, low manufacturing cost, easy to manufacture high precision.

1.5 general methods of stamping cage diameter greater than 200mm, slewing bearing‍ the bearing or high-speed operation, the use of the car business entity retainer. Variant structure of deep groove ball bearing as many as 60.