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| Parameter | TIMKENM349549 / M349510257.175 × 342.9 × 57.15 mm | KOYOM349549/10257.175 × 342.9 × 57.15 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | TIMKEN | KOYO |
| Designation | M349549 / M349510 | M349549/10 |
| Product family | TS - Tapered Single | Single-row / Inch series |
| Detailed type | Tapered roller bearings | Tapered roller bearings |
| Series | M349500 | — |
| Bore diameterd | 257.175 mm | 257.175 mm |
| Outside diameterD | 342.9 mm | 342.9 mm |
| WidthB | 57.15 mm | 57.15 mm |
| Basic dynamic load ratingC | 680 kN | 764 kN |
| Basic static load ratingC0 | 1430 kN | 1280 kN |
| Fatigue load limitPu | — | 135 kN |
| Limiting speednG | — | 870 r/min |
| Mass≈m | 13.71 kg | 13.26 kg |
| Precision class | ABMA Class 2 | — |
| Sealing | Open | — |
| Cage | Steel cage | — |
| Calculation Factors | ||
| K Factor | 1.68 | — |
| Y1 Factor | 1.73 | — |
| Y2 Factor | 0.00 | — |
| Y0 Factor | 0.95 | — |
| E Factor | 0.35 | — |
| Cg Factor | 0.1475 | — |
| 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 | 000000000100117912 | — |
| Official Class Key | — | 050-010-020 |
| World Assembly Part Number | M349549_M349510 | — |
| Inner Ring Part Number | M349549 | — |
| Outer Ring Part Number | M349510 | — |
| Drawing Number | C-29437 | — |
| Upc | 0053893660875 | — |
| Official Source System | CORE BP - DS DF | — |
| Official Last Run | 2026-08-23T20:02:46.743 | — |
| Product Identity | ||
| Type Description | TS - Tapered Single | — |
| Construction | Single Row Tapered Roller Bearing Assembly | Imperial Series | 10.1250 in Bore | 13.5000 in OD | 2.2500 in Width | Open | Cylindrical Bore | Steel Cage | Precision ABMA Class 2 | — |
| Number Of Rows | 1 | — |
| Tapered Bore | N | — |
| Technical Data | ||
| d | — | 342.900 mm |
| T | — | 57.150 mm |
| B | — | 57.150 mm |
| C | — | 44.450 mm |
| Overall Width | 65.250 mm | — |
| R(Min.) | — | 6.4 mm |
| Radial Rating | 176,000 N | — |
| R1(Min.) | — | 3.2 mm |
| Axial Rating | 105,000 N | — |
| Basic Load Ratings : Cr | — | 764 kN |
| Dynamic Rating C1 | 680,000 N | — |
| Basic Load Ratings : C0R | — | 1280 kN |
| Dynamic Rating C90 | 176,000 N | — |
| Fatigue Load Limit : Cu | — | 135 kN |
| Dynamic Axial Rating Ca90 | 105,000 N | — |
| Limiting Speeds(Grease Lub.) | — | 870 min-1 |
| Dynamic Axial Rating Ca1 | 404,000 N | — |
| Limiting Speeds(Oil Lub.) | — | 1200 min-1 |
| Static Radial Rating C0 | 1,430,000 N | — |
| Load Center Spread : A | — | 60.1 mm |
| Extended Dynamic Rating Ce | 0 N | — |
| Constant :E | — | 0.35 |
| Static Axial Rating C0A | 1,440,000 N | — |
| Axial Load Factors : Y1 | — | 1.73 |
| Axial Load Factors : Y0 | — | 0.95 |
| Da | — | 320.0 mm |
| Db | — | 330.0 mm |
| Ra(Max.) | — | 6.4 mm |
| Rb(Max.) | — | 3.2 mm |
| Mass(Refer.) | — | 13.26 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.