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| Parameter | TIMKENLM772749D-902A1;489.026 × 634.873 × 153.988 mm | KOYOLM772749D/710/710D489.026 × 634.873 × 320.675 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | TIMKEN | KOYO |
| Designation | LM772749D-902A1; | LM772749D/710/710D |
| Product family | TDI - Tapered Double Inner | Four-row tapered roller bearings |
| Detailed type | Tapered roller bearings | Rolling mill roll neck bearings |
| Series | LM772700 | — |
| Bore diameterd | 489.026 mm | 489.026 mm |
| Outside diameterD | 634.873 mm | 634.873 mm |
| WidthB | 153.988 mm | 320.675 mm |
| Basic dynamic load ratingC | 3240 kN | 5300 kN |
| Basic static load ratingC0 | 7750 kN | 13700 kN |
| Fatigue load limitPu | — | 1230 kN |
| Mass≈m | 125.03 kg | 261 kg |
| Precision class | ABMA Class 2 | — |
| Sealing | Open | — |
| Cage | Steel cage | — |
| Calculation Factors | ||
| K Factor | 1.24 | — |
| Y1 Factor | 1.43 | — |
| Y2 Factor | 2.12 | — |
| Y0 Factor | 1.40 | — |
| E Factor | 0.47 | — |
| Cg Factor | 0.2525 | — |
| 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 | 000000000190113203 | — |
| Official Class Key | — | 140-020-000 |
| World Assembly Part Number | LM772749D_LM772710 | — |
| Inner Ring Part Number | LM772749D | — |
| Outer Ring Part Number | LM772710 | — |
| Drawing Number | E-61826 | — |
| Upc | 0085706277932 | — |
| Official Source System | CORE BP - DS DF | — |
| Official Last Run | 2026-08-23T20:02:48.507 | — |
| Product Identity | ||
| Type Description | TDI - Tapered Double Inner | — |
| Construction | Double Row Tapered Roller Bearing Assembly | Imperial Series | 19.2530 in Bore | 24.9950 in OD | 6.0625 in Width | Open | Cylindrical Bore | Steel Cage | Precision ABMA Class 2 | — |
| Number Of Rows | 2 | — |
| Tapered Bore | N | — |
| Technical Data | ||
| d | — | 634.873 mm |
| T | — | 320.675 mm |
| W | — | 320.675 mm |
| R(Min.) | — | 3.2 mm |
| R1(Min.) | — | 3.2 mm |
| Overall Width | 0.000 mm | — |
| Basic Load Ratings : Cr | — | 5300 kN |
| Radial Rating | 840,000 N | — |
| Basic Load Ratings : C0R | — | 13700 kN |
| Axial Rating | 390,000 N | — |
| Fatigue Load Limit : Cu | — | 1230 kN |
| Dynamic Rating C1 | 3,240,000 N | — |
| Axial Load Factors : Y2 | — | 1.43 mm |
| Dynamic Rating C90 | 840,000 N | — |
| Axial Load Factors : Y3 | — | 2.12 |
| Dynamic Axial Rating Ca90 | 390,000 N | — |
| Axial Load Factors : Y0 | — | 1.40 |
| Dynamic Axial Rating Ca1 | 1,510,000 N | — |
| Constant E | — | 0.47 |
| Static Radial Rating C0 | 7,750,000 N | — |
| Da(Min.) | — | 513 mm |
| Extended Dynamic Rating Ce | 0 N | — |
| Da(Max.) | — | 594 mm |
| Static Axial Rating C0A | 5,340,000 N | — |
| S(Min.) | — | 9.5 mm |
| Ra(Max.) | — | 3.2 mm |
| Rb(Max.) | — | 3.2 mm |
| Mass(Refer.) | — | 261 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.