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| Parameter | TIMKENM12648 / M1261022.225 × 50.005 × 17.526 mm | KOYOM12648/1022.225 × 50.005 × 18.288 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | TIMKEN | KOYO |
| Designation | M12648 / M12610 | M12648/10 |
| Product family | TS - Tapered Single | Single-row / Inch series |
| Detailed type | Tapered roller bearings | Tapered roller bearings |
| Series | M12600 | — |
| Bore diameterd | 22.225 mm | 22.225 mm |
| Outside diameterD | 50.005 mm | 50.005 mm |
| WidthB | 17.526 mm | 18.288 mm |
| Basic dynamic load ratingC | 52.2 kN | 48.8 kN |
| Basic static load ratingC0 | 43.5 kN | 40.7 kN |
| Fatigue load limitPu | — | 5.8 kN |
| Limiting speednG | — | 8500 r/min |
| Mass≈m | 0.17 kg | 0.173 kg |
| Precision class | ABMA Class 2 | — |
| Sealing | Open | — |
| Cage | Steel cage | — |
| Calculation Factors | ||
| K Factor | 2.10 | — |
| Y1 Factor | 2.16 | — |
| Y2 Factor | 0.00 | — |
| Y0 Factor | 1.19 | — |
| E Factor | 0.28 | — |
| Cg Factor | 0.0479 | — |
| 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 | 000000000100056317 | — |
| Official Class Key | — | 050-010-020 |
| World Assembly Part Number | KM12648_M12610 | — |
| Inner Ring Part Number | KM12648 | — |
| Outer Ring Part Number | M12610 | — |
| Drawing Number | A-27608 | — |
| Upc | 0053893653754 | — |
| Official Source System | CORE BP - DS DF | — |
| Official Last Run | 2026-08-23T20:02:47.577 | — |
| Product Identity | ||
| Type Description | TS - Tapered Single | — |
| Construction | Single Row Tapered Roller Bearing Assembly | Imperial Series | 0.8750 in Bore | 1.9687 in OD | 0.6900 in Width | Open | Cylindrical Bore | Steel Cage | Precision ABMA Class 2 | — |
| Number Of Rows | 1 | — |
| Tapered Bore | N | — |
| Technical Data | ||
| d | — | 50.005 mm |
| T | — | 17.526 mm |
| B | — | 18.288 mm |
| C | — | 13.970 mm |
| Overall Width | 20.088 mm | — |
| R(Min.) | — | 1.2 mm |
| Radial Rating | 13,500 N | — |
| R1(Min.) | — | 1.2 mm |
| Axial Rating | 6,440 N | — |
| Basic Load Ratings : Cr | — | 48.8 kN |
| Dynamic Rating C1 | 52,200 N | — |
| Basic Load Ratings : C0R | — | 40.7 kN |
| Dynamic Rating C90 | 13,500 N | — |
| Fatigue Load Limit : Cu | — | 5.80 kN |
| Dynamic Axial Rating Ca90 | 6,440 N | — |
| Limiting Speeds(Grease Lub.) | — | 8500 min-1 |
| Dynamic Axial Rating Ca1 | 24,800 N | — |
| Limiting Speeds(Oil Lub.) | — | 11000 min-1 |
| Static Radial Rating C0 | 43,500 N | — |
| Load Center Spread : A | — | 11.1 mm |
| Extended Dynamic Rating Ce | 0 N | — |
| Constant :E | — | 0.28 |
| Static Axial Rating C0A | 35,200 N | — |
| Axial Load Factors : Y1 | — | 2.16 |
| Axial Load Factors : Y0 | — | 1.19 |
| Da | — | 44.0 mm |
| Db | — | 46.0 mm |
| Ra(Max.) | — | 1.2 mm |
| Rb(Max.) | — | 1.2 mm |
| Mass(Refer.) | — | 0.173 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.