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| Parameter | TIMKENLM281849 / LM281810679.45 × 901.7 × 142.875 mm | KOYOLM281849D/810/810D679.45 × 901.7 × 552.45 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | TIMKEN | KOYO |
| Designation | LM281849 / LM281810 | LM281849D/810/810D |
| Product family | TS - Tapered Single | Four-row tapered roller bearings |
| Detailed type | Tapered roller bearings | Rolling mill roll neck bearings |
| Series | LM281800 | — |
| Bore diameterd | 679.45 mm | 679.45 mm |
| Outside diameterD | 901.7 mm | 901.7 mm |
| WidthB | 142.875 mm | 552.45 mm |
| Basic dynamic load ratingC | 5020 kN | 13700 kN |
| Basic static load ratingC0 | 11000 kN | 36100 kN |
| Fatigue load limitPu | — | 2820 kN |
| Mass≈m | 246.73 kg | 973 kg |
| Precision class | ABMA Class 4 | — |
| Sealing | Open | — |
| Cage | Steel cage | — |
| Calculation Factors | ||
| K Factor | 1.76 | — |
| Y1 Factor | 1.80 | — |
| Y2 Factor | 0.00 | — |
| Y0 Factor | 0.99 | — |
| E Factor | 0.33 | — |
| Cg Factor | 0.3252 | — |
| 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 | 000000000100173482 | — |
| Official Class Key | — | 140-020-000 |
| World Assembly Part Number | LM281849_LM281810 | — |
| Inner Ring Part Number | LM281849 | — |
| Outer Ring Part Number | LM281810 | — |
| Drawing Number | E-29361 | — |
| Upc | 0053893124506 | — |
| Official Source System | CORE BP - DS DF | — |
| Official Last Run | 2026-08-23T20:02:47.683 | — |
| Product Identity | ||
| Type Description | TS - Tapered Single | — |
| Construction | Single Row Tapered Roller Bearing Assembly | Imperial Series | 26.7500 in Bore | 35.5000 in OD | 5.6250 in Width | Open | Cylindrical Bore | Steel Cage | Precision ABMA Class 4 | — |
| Number Of Rows | 1 | — |
| Tapered Bore | N | — |
| Technical Data | ||
| d | — | 901.700 mm |
| T | — | 552.450 mm |
| W | — | 552.450 mm |
| R(Min.) | — | 6.4 mm |
| R1(Min.) | — | 3.2 mm |
| Overall Width | 162.675 mm | — |
| Basic Load Ratings : Cr | — | 13700 kN |
| Radial Rating | 1,300,000 N | — |
| Basic Load Ratings : C0R | — | 36100 kN |
| Axial Rating | 741,000 N | — |
| Fatigue Load Limit : Cu | — | 2820 kN |
| Dynamic Rating C1 | 5,020,000 N | — |
| Axial Load Factors : Y2 | — | 2.03 mm |
| Dynamic Rating C90 | 1,300,000 N | — |
| Axial Load Factors : Y3 | — | 3.02 |
| Dynamic Axial Rating Ca90 | 741,000 N | — |
| Axial Load Factors : Y0 | — | 1.98 |
| Dynamic Axial Rating Ca1 | 2,860,000 N | — |
| Constant E | — | 0.33 |
| Static Radial Rating C0 | 11,000,000 N | — |
| Da(Min.) | — | 724 mm |
| Extended Dynamic Rating Ce | 0 N | — |
| Da(Max.) | — | 847 mm |
| Static Axial Rating C0A | 10,700,000 N | — |
| S(Min.) | — | 11.5 mm |
| Ra(Max.) | — | 6.4 mm |
| Rb(Max.) | — | 3.2 mm |
| Mass(Refer.) | — | 973 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.