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| Parameter | TIMKENLM742749 / LM742710215.9 × 285.75 × 46.038 mm | KOYOLM742749D/714/714D215.9 × 288.925 × 177.8 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | TIMKEN | KOYO |
| Designation | LM742749 / LM742710 | LM742749D/714/714D |
| Product family | TS - Tapered Single | Four-row tapered roller bearings |
| Detailed type | Tapered roller bearings | Rolling mill roll neck bearings |
| Series | LM742700 | — |
| Bore diameterd | 215.9 mm | 215.9 mm |
| Outside diameterD | 285.75 mm | 288.925 mm |
| WidthB | 46.038 mm | 177.8 mm |
| Basic dynamic load ratingC | 430 kN | 1310 kN |
| Basic static load ratingC0 | 892 kN | 3120 kN |
| Fatigue load limitPu | — | 381 kN |
| Mass≈m | 7.65 kg | 32.8 kg |
| Precision class | ABMA Class 4 | — |
| Sealing | Open | — |
| Cage | Steel cage | — |
| Calculation Factors | ||
| K Factor | 1.21 | — |
| Y1 Factor | 1.25 | — |
| Y2 Factor | 0.00 | — |
| Y0 Factor | 0.69 | — |
| E Factor | 0.48 | — |
| Cg Factor | 0.1388 | — |
| 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 | 000000000100114735 | — |
| Official Class Key | — | 140-020-000 |
| World Assembly Part Number | LM742749_LM742710 | — |
| Inner Ring Part Number | LM742749 | — |
| Outer Ring Part Number | LM742710 | — |
| Drawing Number | B-30103 | — |
| Upc | 0053893770857 | — |
| Official Source System | CORE BP - DS DF | — |
| Official Last Run | 2026-08-23T20:02:47.287 | — |
| Product Identity | ||
| Type Description | TS - Tapered Single | — |
| Construction | Single Row Tapered Roller Bearing Assembly | Imperial Series | 8.5000 in Bore | 11.2500 in OD | 1.8125 in Width | Open | Cylindrical Bore | Steel Cage | Precision ABMA Class 4 | — |
| Number Of Rows | 1 | — |
| Tapered Bore | N | — |
| Technical Data | ||
| d | — | 288.925 mm |
| T | — | 177.800 mm |
| W | — | 177.800 mm |
| R(Min.) | — | 3.2 mm |
| R1(Min.) | — | 0.8 mm |
| Overall Width | 53.638 mm | — |
| Basic Load Ratings : Cr | — | 1310 kN |
| Radial Rating | 111,000 N | — |
| Basic Load Ratings : C0R | — | 3120 kN |
| Axial Rating | 91,800 N | — |
| Fatigue Load Limit : Cu | — | 381 kN |
| Dynamic Rating C1 | 430,000 N | — |
| Axial Load Factors : Y2 | — | 1.40 mm |
| Dynamic Rating C90 | 111,000 N | — |
| Axial Load Factors : Y3 | — | 2.09 |
| Dynamic Axial Rating Ca90 | 91,800 N | — |
| Axial Load Factors : Y0 | — | 1.37 |
| Dynamic Axial Rating Ca1 | 354,000 N | — |
| Constant E | — | 0.48 |
| Static Radial Rating C0 | 892,000 N | — |
| Da(Min.) | — | 229 mm |
| Extended Dynamic Rating Ce | 0 N | — |
| Da(Max.) | — | 265 mm |
| Static Axial Rating C0A | 1,250,000 N | — |
| S(Min.) | — | 5.5 mm |
| Ra(Max.) | — | 3.2 mm |
| Rb(Max.) | — | 0.8 mm |
| Mass(Refer.) | — | 32.8 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.