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| Parameter | TIMKENL540049 / L540010196.85 × 254 × 28.575 mm | KOYOL540049/10196.85 × 254 × 27.783 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | TIMKEN | KOYO |
| Designation | L540049 / L540010 | L540049/10 |
| Product family | TS - Tapered Single | Single-row / Inch series |
| Detailed type | Tapered roller bearings | Tapered roller bearings |
| Series | L540000 | — |
| Bore diameterd | 196.85 mm | 196.85 mm |
| Outside diameterD | 254 mm | 254 mm |
| WidthB | 28.575 mm | 27.783 mm |
| Basic dynamic load ratingC | 211 kN | 236 kN |
| Basic static load ratingC0 | 408 kN | 387 kN |
| Fatigue load limitPu | — | 48.2 kN |
| Limiting speednG | — | 1200 r/min |
| Mass≈m | 3.33 kg | 3.36 kg |
| Precision class | ABMA Class 2 | — |
| Sealing | Open | — |
| Cage | Steel cage | — |
| Calculation Factors | ||
| K Factor | 1.47 | — |
| Y1 Factor | 1.51 | — |
| Y2 Factor | 0.00 | — |
| Y0 Factor | 0.83 | — |
| E Factor | 0.40 | — |
| Cg Factor | 0.1371 | — |
| Classification | ||
| Official Category Path | — | Tapered roller bearings - Single-row - Inch series |
| Official Classification 1 | — | Tapered roller bearings / Single-row / Inch series |
| Manufacturer Identity | ||
| Material Number | 000000000190019482 | — |
| Official Class Key | — | 050-010-020 |
| World Assembly Part Number | L540049_L540010 | — |
| Inner Ring Part Number | L540049 | — |
| Outer Ring Part Number | L540010 | — |
| Drawing Number | B-26211 | — |
| Upc | 0053893883151 | — |
| Official Source System | CORE BP - DS DF | — |
| Official Last Run | 2026-08-23T20:02:46.32 | — |
| Product Identity | ||
| Type Description | TS - Tapered Single | — |
| Construction | Single Row Tapered Roller Bearing Assembly | Imperial Series | 7.7500 in Bore | 10.0000 in OD | 1.1250 in Width | Open | Cylindrical Bore | Steel Cage | Precision ABMA Class 2 | — |
| Number Of Rows | 1 | — |
| Tapered Bore | N | — |
| Technical Data | ||
| d | — | 254.000 mm |
| T | — | 28.575 mm |
| B | — | 27.783 mm |
| C | — | 21.433 mm |
| Overall Width | 32.283 mm | — |
| R(Min.) | — | 1.6 mm |
| Radial Rating | 54,700 N | — |
| R1(Min.) | — | 1.6 mm |
| Axial Rating | 37,100 N | — |
| Basic Load Ratings : Cr | — | 236 kN |
| Dynamic Rating C1 | 211,000 N | — |
| Basic Load Ratings : C0R | — | 387 kN |
| Dynamic Rating C90 | 54,700 N | — |
| Fatigue Load Limit : Cu | — | 48.2 kN |
| Dynamic Axial Rating Ca90 | 37,100 N | — |
| Limiting Speeds(Grease Lub.) | — | 1200 min-1 |
| Dynamic Axial Rating Ca1 | 143,000 N | — |
| Limiting Speeds(Oil Lub.) | — | 1600 min-1 |
| Static Radial Rating C0 | 408,000 N | — |
| Load Center Spread : A | — | 43.1 mm |
| Extended Dynamic Rating Ce | 0 N | — |
| Constant :E | — | 0.40 |
| Static Axial Rating C0A | 472,000 N | — |
| Axial Load Factors : Y1 | — | 1.51 |
| Axial Load Factors : Y0 | — | 0.83 |
| Da | — | 238.0 mm |
| Db | — | 245.0 mm |
| Ra(Max.) | — | 1.6 mm |
| Rb(Max.) | — | 1.6 mm |
| Mass(Refer.) | — | 3.36 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.