NTN 4T-30212 tapered roller bearings
385 Series are 384ED Cup Part Number a few brands you will find in our inventory. Find NTN 4T-30212 tapered roller bearings to see what’s in stock!
| Series | 385 |
| Cone Part Number | 387-S |
| Cup Part Number | 384ED |
| Design Units | Imperial |
| Bearing Weight | 3.12 lb |
| Cage Type | Stamped Steel |
| Ab – Cage-Cone Frontface Clearance | 0.11 in |
| d | 2.2500 in |
| D | 3.9370 in |
| B – Cone Width | 0.8640 in |
| C – Double Cup Width | 1.5620 in |
| T – Bearing Width across Cones | 1.9369 in |
| R – Cone Backface To Clear Radius1 | 0.03 in |
| r – Cup Frontface To Clear Radius2 | 0.03 in |
| db – Cone Backface Backing Diameter | 2.52 in |
| Da – Cup Frontface Backing Diameter | 3.68 in |
| Aa – Cage-Cone Backface Clearance | 0.03 in |
| C90 – Dynamic Radial Rating (One-Row, 90 million revolutions)3 | 6280 lbf |
| C1 – Dynamic Radial Rating (Two-Row, 1 million revolutions)4 | 42200 lbf |
| C90(2) – Dynamic Radial Rating (Two-Row, 90 million revolutions)5 | 10900 lbf |
| Ca90 – Dynamic Thrust Rating (90 million revolutions)6 | 3810 lbf |
| K – Factor7 | 1.65 |
| e – ISO Factor8 | 0.35 |
| Y1 – ISO Factor9 | 1.91 |
| Y2 – ISO Factor10 | 2.84 |
| G1 – Heat Generation Factor (Roller-Raceway)11 | 42 |
| G2 – Heat Generation Factor (Rib-Roller End) | 15.7 |
| Cg – Geometry Factor12 | 0.0859 |
Detailed Parameters
parameter：
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