6203 Bearing Dimensions
17 × 40 × 12 mm
✓ Verified starter recordThe standard 6203 bearing has a 17 mm bore, 40 mm outside diameter, and 12 mm width. This page provides a dimensional reference in millimeters and inches, plus nearby sizes for comparison.
6203 bearing size
| Dimension | Metric | Inches |
|---|---|---|
| Bore diameter (d) | 17 mm | 0.6693 in |
| Outside diameter (D) | 40 mm | 1.5748 in |
| Width (B) | 12 mm | 0.4724 in |
Inch values are metric conversions rounded to four decimal places.
What does 6203 mean?
6203 identifies a bearing in the 6200 dimensional series. For practical replacement work, the key fit dimensions are the bore, outside diameter and width. A part marked 6203 should therefore be checked against 17 × 40 × 12 mm before selection.
Suffixes such as seals, shields, internal clearance or manufacturer-specific variants can change construction or operating characteristics even when the principal dimensions remain the same. Confirm the exact manufacturer designation for critical applications.
Related bearing dimensions
6203 dimension FAQ
What is the bore of a 6203?
The bore diameter is 17 mm (0.6693 in).
What is the OD of a 6203?
The outside diameter is 40 mm (1.5748 in).
How wide is a 6203?
The bearing width is 12 mm (0.4724 in).