BEARINGDEXAngular contact ball
7209 bearing
45 mm bore, 85 mm outside diameter, 19 mm width (1.7717 × 3.3465 × 0.748 in).
Dimensions
| mm | inch | |
|---|---|---|
| Bore d | 45 | 1.7717 |
| Outside diameter D | 85 | 3.3465 |
| Width B | 19 | 0.7480 |
Quick numbers
| Pitch diameter dm | 65.0 mm |
| Section height (D − d)/2 | 20.0 mm |
| n·dm at 1,800 rpm | 117,000 |
| n·dm at 3,600 rpm | 234,000 |
Compare against the maker's limiting speed. Speed calculator · L10 life
What the number means
7Angular contact ball
2Diameter series 2: light. Width series 0 is implied and left off.
09Bore code 09 × 5 = 45 mm
Same size, different bearing
These share the 45 × 85 × 19 mm envelope but carry load differently. They aren't drop-in swaps.