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Product name: Two-way thrust angular contact ball bearing
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Price: ASK
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Post date: 2024-01-10
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Stock Quantity:
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Product features
Strong axial bearing capacity and high stiffness ; .
High machining precision, can work at a higher speed ;
The characteristics of two-way thrust angular contact ball bearing is that they can bear the combined
load of radial and axial at the same time, limiting the axial displacement of both sides of the shaft.
Main areas
Machine tool screw, spindle, etc.
Structure and characteristics
Two-way thrust angular contact ball bearing is a high-precision bearing specially designed for machine tool spindle, which can withstand axial load in two directions. Compared with the 511 series of thrust ball bearing, the ball assembled in the bearing has a small diameter, a large number of balls and a 60 contact angle. Therefore, the influence of centrifugal force is reduced, more resistant to high-speed rotation, large rigidity, size series 234400 and size series 234900 bearings, respectively, and cylindrical roller bearings NN3000K series and NNU4900K series of inner and outer diameter size is the same, withstand axial load.
Dimensions
The basic dimensions of two-way thrust angular contact ball bearing shall be implemented in accordance with the provisions of JB/6362.
Tolerance grade two-way thrust angular contact ball bearing provides SP tolerance grade products, and UP tolerance grade products can be provided whenrequired.
Cage
The cage is made of mesh alloy car cage, and the structure with BM1 after the code is improved for the traditional design of the cage structure, because the cage size is in the middle, the lubrication space is increased, and special copper alloy is used as the cage material, the friction area of the cage is reduced, so the allowable rotation speed is increased by 50%.
The preload of the two-way thrust angular contact ball bearing is determined by the spacer diagram installed between the two shaft diagrams. The antenna of the two-way thrust angular contact ball bearing is 60, so that the ball can be reliably guided when running at high speed. The use of thrust angular contact ball bearing can achieve significantly higher speed than the use of the corresponding thrust ball bearing.
Mounting dimensions
Bearing rings are only allowed to fit with shaft shoulders and support seat shoulders and cannot be stuck by the chamfer of shaft and housing. Therefore, the maximum chamfer radius of the matching piece ramax must be less than the thrust angular contact ball bearing corresponding chamfer of the minimum coordinate rsmin, the shoulder of the matching piece should be high enough to meet the maximum chamfer coordinate in the case can also have a sufficient supporting area, the table lists the chamfer radius ramax size and the diameter of the supporting shaft shoulder recommended to cooperate with the shaft diagram.
Recommended fit
The matching of the shaft ring and the shaft is aimed at a state without interference or clearance; The fit of halo seat ring and shell hole is a dynamic fit. In the case of housing with the same inner diameter in parallel with double row cylindrical roller bearings, the outer diameter dimension tolerance is 16 in order to become a dynamic fit.