
Koyo 1203 self-aligning ball bearing
Koyo 1203 self-aligning ball bearing: bore d 17 mm, outside diameter D 40 mm, width 12 mm.
Figure © Koyo, clipped unaltered from Koyo Ball & Roller Bearings catalog B2001E-6 — Standard Bearings section (B2001E-6b). It illustrates the product family printed there, which may include other sizes. Removed on request.


Specifications
| Bore d | 17 mm |
|---|---|
| Outside diameter D | 40 mm |
| Width | 12 mm |
| Basic dynamic load rating Cr | 7.90 kN |
| Basic static load rating C0r | 2.05 kN |
| Limiting speed, grease lubrication | 16000 min-1 |
| Limiting speed, oil lubrication | 20000 min-1 |
All specifications: Verifiedprinted in Koyo’s own catalogue
Same size, other makers and types (17 × 40 × 12 mm)
| Part | Manufacturer | Type |
|---|---|---|
| 6203LB | NTN | deep groove ball bearing |
| 6203LBN | NTN | deep groove ball bearing |
| 6203LBNC3 | NTN | deep groove ball bearing |
| 6203LU/5C | NTN | deep groove ball bearing |
| 6203LU | NTN | deep groove ball bearing |
| 6203LUC3/5C | NTN | deep groove ball bearing |
| 6203LUC3 | NTN | deep groove ball bearing |
| 6203LUN | NTN | deep groove ball bearing |
| 6203LUNC3 | NTN | deep groove ball bearing |
| 6203ZN | NTN | deep groove ball bearing |
| 6203ZNC3 | NTN | deep groove ball bearing |
| 7203 | Koyo | angular contact ball bearing |
These match this part on the dimensions each maker prints. A size match is not a stated interchange: check the other specifications before substituting. 9 more share this size.
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