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.