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| Parameter | TIMKENM255449D-90054288.925 × 406.4 × 144.462 mm | KOYOM255449D/410/410D288.925 × 406.4 × 298.45 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | TIMKEN | KOYO |
| Designation | M255449D-90054 | M255449D/410/410D |
| Product family | TDI - Tapered Double Inner | Four-row tapered roller bearings |
| Detailed type | Tapered roller bearings | Rolling mill roll neck bearings |
| Series | M255400 | — |
| Bore diameterd | 288.925 mm | 288.925 mm |
| Outside diameterD | 406.4 mm | 406.4 mm |
| WidthB | 144.462 mm | 298.45 mm |
| Basic dynamic load ratingC | 2070 kN | 3700 kN |
| Basic static load ratingC0 | 5040 kN | 8840 kN |
| Fatigue load limitPu | — | 890 kN |
| Mass≈m | 60.79 kg | 127 kg |
| Precision class | ABMA Class 4 | — |
| Sealing | Open | — |
| Cage | Steel cage | — |
| Calculation Factors | ||
| K Factor | 1.73 | — |
| Y1 Factor | 2.00 | — |
| Y2 Factor | 2.97 | — |
| Y0 Factor | 1.95 | — |
| E Factor | 0.34 | — |
| Cg Factor | 0.1722 | — |
| 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 | 000000000100180988 | — |
| Official Class Key | — | 140-020-000 |
| World Assembly Part Number | M255449D_M255410 | — |
| Inner Ring Part Number | M255449D | — |
| Outer Ring Part Number | M255410 | — |
| Drawing Number | C-22616 | — |
| Upc | 0053893559810 | — |
| Official Source System | CORE BP - DS DF | — |
| Official Last Run | 2026-08-23T20:02:47.393 | — |
| Product Identity | ||
| Type Description | TDI - Tapered Double Inner | — |
| Construction | Double Row Tapered Roller Bearing Assembly | Imperial Series | 11.3750 in Bore | 16.0000 in OD | 5.6875 in Width | Open | Cylindrical Bore | Steel Cage | Precision ABMA Class 4 | — |
| Number Of Rows | 2 | — |
| Tapered Bore | N | — |
| Technical Data | ||
| d | — | 406.400 mm |
| T | — | 298.450 mm |
| W | — | 298.450 mm |
| R(Min.) | — | 3.2 mm |
| R1(Min.) | — | 3.2 mm |
| Overall Width | 0.000 mm | — |
| Basic Load Ratings : Cr | — | 3700 kN |
| Radial Rating | 537,000 N | — |
| Basic Load Ratings : C0R | — | 8840 kN |
| Axial Rating | 179,000 N | — |
| Fatigue Load Limit : Cu | — | 890 kN |
| Dynamic Rating C1 | 2,070,000 N | — |
| Axial Load Factors : Y2 | — | 2.00 mm |
| Dynamic Rating C90 | 537,000 N | — |
| Axial Load Factors : Y3 | — | 2.97 |
| Dynamic Axial Rating Ca90 | 179,000 N | — |
| Axial Load Factors : Y0 | — | 1.95 |
| Dynamic Axial Rating Ca1 | 689,000 N | — |
| Constant E | — | 0.34 |
| Static Radial Rating C0 | 5,040,000 N | — |
| Da(Min.) | — | 316 mm |
| Extended Dynamic Rating Ce | 0 N | — |
| Da(Max.) | — | 373 mm |
| Static Axial Rating C0A | 2,480,000 N | — |
| S(Min.) | — | 9 mm |
| Ra(Max.) | — | 3.2 mm |
| Rb(Max.) | — | 3.2 mm |
| Mass(Refer.) | — | 127 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.