Product Description
FZH (copper-based), FZL (aluminum-based), and FZP (resin-based) steel balls are kept solid, and are respectively based on copper alloy, hard aluminum alloy, and POM resin. Appropriately sized and specially shaped holes are embedded with rolling bearing steel balls in the holes.
The mouth adopts the latest groove circumferential ball locking technology, which effectively solves the problem that the traditional locking ball and the indentation locking ball cannot completely prevent the steel ball from falling off. The bottom of the hole is machined with a 90° stop so that the steel ball can rotate freely in the hole without falling off.
Since the diameter of the steel ball is larger than the wall thickness of the retaining ring, the steel ball is higher than the inner and outer surfaces of the retaining ring during use, and directly contacts the matching hole and the shaft, so that the matrix (retaining ring) floats in the middle, and the matching The difference between the radius of the hole and the shaft is smaller than the diameter of the steel ball, that is, the steel ball is fitted with an interference fit, and the fitting precision is high, and the relative movement of the shaft and the hole is flexible. It is an updated product of the maintenance circle.
Advantages and Uses
Advantages and Uses
There is a certain gap between the traditional hole and the shaft with relative motion, and the friction coefficient between the hole and the shaft is relatively large. After using the steel ball retaining ring, the shaft and the hole are not in direct contact, but through a small amount of interference in the middle. The steel ball has high motion accuracy, rolling friction instead of dynamic friction, flexible rolling, small friction coefficient, and long service life. However, the motion accuracy is low. Rolling bearings can only meet the relative rotation of the shaft, and the steel ball retaining ring can meet the above two conditions. It has been widely used in cold die rolling die sets, high-precision machine tools, Machine tool accessories and occasions requiring high-precision axial or axial radial simultaneous movement.
Requirements for matching parts
1. Guide sleeve: material GCrl5, YB9, heat treatment, hardness HRC62~66, technical conditions should be 0.01-0.02 radial interference in accordance with GB/T12446 and the shaft fit, and the surface roughness is
2.Shaft: material GCrl5, YB9, heat treatment, hardness HRC62~66, technical conditions according to GB/T12446, shaft tolerance is h5, surface roughness is
3.Measurement: measure the dimensional deviation of the shaft guide bush and the steel ball with common measuring means (pneumatic gauge, outer diameter dry gauge, inner diameter dial gauge, etc.) dmax+2d'-DmIn, the required interference is 0.01-0.02mm
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