638 ZZ / 2Z 8x28x9mm Miniature Deep Groove Ball Bearing
For use in special conditions. The miniature ball bearing 638-ZZ / 2Z is small and suitable for installation with limited space and on thin shafts. It can withstand very high speeds.
Features
-
miniature ball bearing with smallest dimensions
-
suitable for high radial loads and light axial loads in both directions
-
suitable for high running accuracy, quiet running and very high speeds
-
seal: non-contact gap seal on both sides made of a profiled sheet steel disc (ZZ / 2Z) for higher speeds than with rubber seal
-
good fixed bearing property, but can also be used as a floating bearing, each in both directions
Technical Data
Inside Ø (mm):
8
Outside Ø (mm):
28
Width (mm):
9
Tolerance for inside-Ø (mm):
0/-0,008
Tolerance for outside-Ø (mm):
0/-0,009
Tolerance for width (mm):
0/-0,12
Rows Of Balls:
single row
Seal:
ZZ
Internal Clearance:
CN (Standard)
Flange:
no
Slot & Snap Ring:
no
Ring Material:
Rolling bearing steel
Rolling Element Material:
Rolling bearing steel
Cage Material:
Sheet Steel
Full Complement Ball Set:
no
- miniature ball bearing with smallest dimensions
- suitable for high radial loads and light axial loads in both directions
- suitable for high running accuracy, quiet running and very high speeds
- seal: non-contact gap seal on both sides made of a profiled sheet steel disc (ZZ / 2Z) for higher speeds than with rubber seal
- good fixed bearing property, but can also be used as a floating bearing, each in both directions
| Inside Ø (mm): | 8 |
| Outside Ø (mm): | 28 |
| Width (mm): | 9 |
| Tolerance for inside-Ø (mm): | 0/-0,008 |
| Tolerance for outside-Ø (mm): | 0/-0,009 |
| Tolerance for width (mm): | 0/-0,12 |
| Rows Of Balls: | single row |
| Seal: | ZZ |
| Internal Clearance: | CN (Standard) |
| Flange: | no |
| Slot & Snap Ring: | no |
| Ring Material: | Rolling bearing steel |
| Rolling Element Material: | Rolling bearing steel |
| Cage Material: | Sheet Steel |
| Full Complement Ball Set: | no |
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