FZ
FZH（copper）、FZL（Aluminium）、FZP（Resin Matrix Composite）Ball Retainer ，Copper alloy, hard aluminum alloy, and POM resin are used as the matrix, and on the outer surface of the outer circle, holes with orderly arrangement, appropriate size and special shape are processed, and rolling bearing steel balls are inserted into the holes. The use of the latest grooved circumferential ball lock technology effectively solves the problem that the traditional ball lock and indentation lock 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.
Product advantages
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 the steel ball is used to retain the ring, the shaft and the hole are not in direct contact, but through a small amount of interference in the middle. The steel ball, therefore, has high motion accuracy, rolling friction instead of dynamic friction, flexible rolling, small friction coefficient, and long service life. When there is both rotation and movement, the shaft sleeve without oil or oil is used to match the shaft, although it can It meets, but the motion accuracy is low. Rolling bearings can only meet the relative rotation of the shaft. The steel ball retaining ring meets 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 radial simultaneous movement.
Requirements for matching parts
1.Guide sleeve: material GCrl5, YB9, heat treatment, hardness HRC62~66, technical conditions according to GB/T12446 and shaft should have 0.01-0.02 radial interference, surface roughness is 0.05
2.Shaft: Material GCrl5, YB9, heat treatment, hardness HRC62~66, technical conditions according to GB/T12446, shaft tolerance adopts h5, surface roughness is 0.05
3.Measurement: Use general measuring methods (pneumatic measuring instrument, outer diameter dry scale, inner diameter dial gauge, etc.) to measure the dimensional deviation value of the shaft guide sleeve and the steel ball, and then the interference after fitting can be obtained, namely Ymax=dmax+2d'-DmIn, the required interference is 0.01-0.02mm
Tech. Data
|
Performance |
FZH | FZL |
FZP |
|
Max. Load |
30 |
30 |
30 |
|
Max. Speed |
6 |
6 |
6 |
|
Matching gap |
0.08~1.2 |
0.08~1.2 |
0.08~1.2 |
|
Deviation of steel ball diameter |
20~40 |
20~40 |
20~40 |
|
Friction coefficient |
0.01~0.08 |
0.01~0.08 |
0.01~0.08 |
