7938 KOYO Single-row, matched pair angular contact ball bearings
| Brand Name: | KOYO |
| Model Number: | 7938 |
| Series: | 25500 |
| Cone Part Number: | 25570 |
| Cup Part Number: | 25520D |
| Design Units: | Imperial |
| Bearing Weight: | 3.27 lb |
| Cage Type: | Stamped Steel |
| Ab - Cage-Cone Frontface Clearance: | 0.06 in |
| d: | 1.4375 in |
| PDF |
7938 |
Product Details
| Series | 25500 |
| Cone Part Number | 25570 |
| Cup Part Number | 25520D |
| Design Units | Imperial |
| Bearing Weight | 3.27 lb |
| Cage Type | Stamped Steel |
| Ab - Cage-Cone Frontface Clearance | 0.06 in |
| d | 1.4375 in |
| D | 3.2650 in |
| B - Cone Width | 1.0000 in |
| C - Double Cup Width | 1.8750 in |
| T - Bearing Width across Cones | 2.2500 in |
| R - Cone Backface To Clear Radius1 | 0.14 in |
| r - Cup Frontface To Clear Radius2 | 0.03 in |
| db - Cone Backface Backing Diameter | 2.01 in |
| Da - Cup Frontface Backing Diameter | 3.05 in |
| Aa - Cage-Cone Backface Clearance | 0.01 in |
| C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)3 | 5270 lbf |
| C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)4 | 35400 lbf |
| C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 | 9180 lbf |
| Ca90 - Dynamic Thrust Rating (90 million revolutions)6 | 3020 lbf |
| K - Factor7 | 1.74 |
| e - ISO Factor8 | 0.33 |
| Y1 - ISO Factor9 | 2.02 |
| Y2 - ISO Factor10 | 3 |
| G1 - Heat Generation Factor (Roller-Raceway)11 | 35.2 |
| G2 - Heat Generation Factor (Rib-Roller End) | 14.3 |
| Cg - Geometry Factor12 | 0.0801 |
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