BEARINGDEXAngular contact ball
7304 bearing
20 mm bore, 52 mm outside diameter, 15 mm width (0.7874 × 2.0472 × 0.5906 in).
Dimensions
| mm | inch | |
|---|---|---|
| Bore d | 20 | 0.7874 |
| Outside diameter D | 52 | 2.0472 |
| Width B | 15 | 0.5906 |
Quick numbers
| Pitch diameter dm | 36.0 mm |
| Section height (D − d)/2 | 16.0 mm |
| n·dm at 1,800 rpm | 64,800 |
| n·dm at 3,600 rpm | 129,600 |
Compare against the maker's limiting speed. Speed calculator · L10 life
What the number means
7Angular contact ball
3Diameter series 3: medium. Width series 0 is implied and left off.
04Bore code 04 × 5 = 20 mm
Same size, different bearing
These share the 20 × 52 × 15 mm envelope but carry load differently. They aren't drop-in swaps.