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| Parameter | TIMKEN8576D-902B1234.95 × 327.025 × 93.662 mm | KOYO8576D/20/20D234.95 × 327.025 × 196.85 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | TIMKEN | KOYO |
| Designation | 8576D-902B1 | 8576D/20/20D |
| Product family | TDI - Tapered Double Inner | Four-row tapered roller bearings |
| Detailed type | Tapered roller bearings | Rolling mill roll neck bearings |
| Series | 8500 | — |
| Bore diameterd | 234.95 mm | 234.95 mm |
| Outside diameterD | 327.025 mm | 327.025 mm |
| WidthB | 93.662 mm | 196.85 mm |
| Basic dynamic load ratingC | 918 kN | 1720 kN |
| Basic static load ratingC0 | 2130 kN | 3720 kN |
| Fatigue load limitPu | — | 401 kN |
| Mass≈m | 25.82 kg | 50.1 kg |
| Precision class | ABMA Class 2 | — |
| Sealing | Open | — |
| Cage | Steel cage | — |
| Calculation Factors | ||
| K Factor | 1.44 | — |
| Y1 Factor | 1.66 | — |
| Y2 Factor | 2.47 | — |
| Y0 Factor | 1.62 | — |
| E Factor | 0.41 | — |
| Cg Factor | 0.1401 | — |
| Classification | ||
| Official Category Path | — | Rolling mill roll neck bearings - Four-row tapered roller bearings |
| Official Classification 1 | — | Rolling mill roll neck bearings / Four-row tapered roller bearings |
| Manufacturer Identity | ||
| Material Number | 000000000100038025 | — |
| Official Class Key | — | 140-020-000 |
| World Assembly Part Number | 8576D_8520 | — |
| Inner Ring Part Number | 8576D | — |
| Outer Ring Part Number | 8520 | — |
| Drawing Number | B-31116 | — |
| Upc | 0053893708287 | — |
| Official Source System | CORE BP - DS DF | — |
| Official Last Run | 2026-08-23T20:02:47.287 | — |
| Product Identity | ||
| Type Description | TDI - Tapered Double Inner | — |
| Construction | Double Row Tapered Roller Bearing Assembly | Imperial Series | 9.2500 in Bore | 12.8750 in OD | 3.6875 in Width | Open | Cylindrical Bore | Steel Cage | Precision ABMA Class 2 | — |
| Number Of Rows | 2 | — |
| Tapered Bore | N | — |
| Technical Data | ||
| d | — | 327.025 mm |
| T | — | 196.850 mm |
| W | — | 196.850 mm |
| R(Min.) | — | 3.2 mm |
| R1(Min.) | — | 1.6 mm |
| Overall Width | 0.000 mm | — |
| Basic Load Ratings : Cr | — | 1720 kN |
| Radial Rating | 238,000 N | — |
| Basic Load Ratings : C0R | — | 3720 kN |
| Axial Rating | 95,200 N | — |
| Fatigue Load Limit : Cu | — | 401 kN |
| Dynamic Rating C1 | 918,000 N | — |
| Axial Load Factors : Y2 | — | 1.66 mm |
| Dynamic Rating C90 | 238,000 N | — |
| Axial Load Factors : Y3 | — | 2.47 |
| Dynamic Axial Rating Ca90 | 95,200 N | — |
| Axial Load Factors : Y0 | — | 1.62 |
| Dynamic Axial Rating Ca1 | 367,000 N | — |
| Constant E | — | 0.41 |
| Static Radial Rating C0 | 2,130,000 N | — |
| Da(Min.) | — | 255 mm |
| Extended Dynamic Rating Ce | 0 N | — |
| Da(Max.) | — | 299 mm |
| Static Axial Rating C0A | 1,260,000 N | — |
| S(Min.) | — | 5.5 mm |
| Ra(Max.) | — | 3.2 mm |
| Rb(Max.) | — | 1.6 mm |
| Mass(Refer.) | — | 50.1 kg |
Independent reference comparison based on the manufacturer data currently loaded. Always verify current limits, tolerances and suffix definitions with the official source before engineering selection.