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| Parameter | TIMKENLM281049 / LM281010646.112 × 857.25 × 141.288 mm | KOYOLM281049D/10/10D646.112 × 857.25 × 542.925 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | TIMKEN | KOYO |
| Designation | LM281049 / LM281010 | LM281049D/10/10D |
| Product family | TS - Tapered Single | Four-row tapered roller bearings |
| Detailed type | Tapered roller bearings | Rolling mill roll neck bearings |
| Series | LM281000 | — |
| Bore diameterd | 646.112 mm | 646.112 mm |
| Outside diameterD | 857.25 mm | 857.25 mm |
| WidthB | 141.288 mm | 542.925 mm |
| Basic dynamic load ratingC | 4700 kN | 12300 kN |
| Basic static load ratingC0 | 10400 kN | 34100 kN |
| Fatigue load limitPu | — | 2680 kN |
| Mass≈m | 219.31 kg | 881 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 | 0.3153 | — |
| 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 | 000000000190017998 | — |
| Official Class Key | — | 140-020-000 |
| World Assembly Part Number | LM281049_LM281010 | — |
| Inner Ring Part Number | LM281049 | — |
| Outer Ring Part Number | LM281010 | — |
| Drawing Number | E-50584 | — |
| Upc | 0013992356864 | — |
| Official Source System | CORE BP - DS DF | — |
| Official Last Run | 2026-08-23T20:02:47.4 | — |
| Product Identity | ||
| Type Description | TS - Tapered Single | — |
| Construction | Single Row Tapered Roller Bearing Assembly | Imperial Series | 25.4375 in Bore | 33.7500 in OD | 5.5625 in Width | Open | Cylindrical Bore | Steel Cage | Precision ABMA Class 4 | — |
| Number Of Rows | 1 | — |
| Tapered Bore | N | — |
| Technical Data | ||
| d | — | 857.250 mm |
| T | — | 542.925 mm |
| W | — | 542.925 mm |
| R(Min.) | — | 6.4 mm |
| R1(Min.) | — | 3.2 mm |
| Overall Width | 161.588 mm | — |
| Basic Load Ratings : Cr | — | 12300 kN |
| Radial Rating | 1,220,000 N | — |
| Basic Load Ratings : C0R | — | 34100 kN |
| Axial Rating | 694,000 N | — |
| Fatigue Load Limit : Cu | — | 2680 kN |
| Dynamic Rating C1 | 4,700,000 N | — |
| Axial Load Factors : Y2 | — | 2.03 mm |
| Dynamic Rating C90 | 1,220,000 N | — |
| Axial Load Factors : Y3 | — | 3.02 |
| Dynamic Axial Rating Ca90 | 694,000 N | — |
| Axial Load Factors : Y0 | — | 1.98 |
| Dynamic Axial Rating Ca1 | 2,680,000 N | — |
| Constant E | — | 0.33 |
| Static Radial Rating C0 | 10,400,000 N | — |
| Da(Min.) | — | 690 mm |
| Extended Dynamic Rating Ce | 0 N | — |
| Da(Max.) | — | 801 mm |
| Static Axial Rating C0A | 10,000,000 N | — |
| S(Min.) | — | 13 mm |
| Ra(Max.) | — | 6.4 mm |
| Rb(Max.) | — | 3.2 mm |
| Mass(Refer.) | — | 881 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.