BEARINGDEXAngular contact ball
7309 bearing
45 mm bore, 100 mm outside diameter, 25 mm width (1.7717 × 3.937 × 0.9843 in).
Dimensions
| mm | inch | |
|---|---|---|
| Bore d | 45 | 1.7717 |
| Outside diameter D | 100 | 3.9370 |
| Width B | 25 | 0.9843 |
Quick numbers
| Pitch diameter dm | 72.5 mm |
| Section height (D − d)/2 | 27.5 mm |
| n·dm at 1,800 rpm | 130,500 |
| n·dm at 3,600 rpm | 261,000 |
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.
09Bore code 09 × 5 = 45 mm
Same size, different bearing
These share the 45 × 100 × 25 mm envelope but carry load differently. They aren't drop-in swaps.