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| Parameter | TIMKENJHM840449 / JHM840410200 × 300 × 65 mm | KOYOJHM840449/10200 × 300 × 62 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | TIMKEN | KOYO |
| Designation | JHM840449 / JHM840410 | JHM840449/10 |
| Product family | TS - Tapered Single | Single-row / Inch series |
| Detailed type | Tapered roller bearings | Tapered roller bearings |
| Series | HM840400 | — |
| Bore diameterd | 200 mm | 200 mm |
| Outside diameterD | 300 mm | 300 mm |
| WidthB | 65 mm | 62 mm |
| Basic dynamic load ratingC | 695 kN | 773 kN |
| Basic static load ratingC0 | 1280 kN | 1140 kN |
| Fatigue load limitPu | — | 124 kN |
| Limiting speednG | — | 1100 r/min |
| Mass≈m | 15.56 kg | 15.1 kg |
| Precision class | ABMA Class N | — |
| Sealing | Open | — |
| Cage | Steel cage | — |
| Calculation Factors | ||
| K Factor | 1.12 | — |
| Y1 Factor | 1.15 | — |
| Y2 Factor | 0.00 | — |
| Y0 Factor | 0.63 | — |
| E Factor | 0.52 | — |
| Cg Factor | 0.1428 | — |
| 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 | 000000000100098863 | — |
| Official Class Key | — | 050-010-020 |
| World Assembly Part Number | JHM840449_JHM840410 | — |
| Inner Ring Part Number | JHM840449 | — |
| Outer Ring Part Number | JHM840410 | — |
| Drawing Number | C-44706 | — |
| Upc | 0053893663241 | — |
| Official Source System | CORE BP - DS DF | — |
| Official Last Run | 2026-08-23T20:02:48.4 | — |
| Product Identity | ||
| Type Description | TS - Tapered Single | — |
| Construction | Single Row Tapered Roller Bearing Assembly | Imperial Series | 7.8740 in Bore | 11.8110 in OD | 2.5591 in Width | Open | Cylindrical Bore | Steel Cage | Precision ABMA Class N | — |
| Number Of Rows | 1 | — |
| Tapered Bore | N | — |
| Technical Data | ||
| d | — | 300.000 mm |
| T | — | 65.000 mm |
| B | — | 62.000 mm |
| C | — | 51.000 mm |
| Overall Width | 72.900 mm | — |
| R(Min.) | — | 3.6 mm |
| Radial Rating | 180,000 N | — |
| R1(Min.) | — | 2.5 mm |
| Axial Rating | 161,000 N | — |
| Basic Load Ratings : Cr | — | 773 kN |
| Dynamic Rating C1 | 695,000 N | — |
| Basic Load Ratings : C0R | — | 1140 kN |
| Dynamic Rating C90 | 180,000 N | — |
| Fatigue Load Limit : Cu | — | 124 kN |
| Dynamic Axial Rating Ca90 | 161,000 N | — |
| Limiting Speeds(Grease Lub.) | — | 1100 min-1 |
| Dynamic Axial Rating Ca1 | 621,000 N | — |
| Limiting Speeds(Oil Lub.) | — | 1500 min-1 |
| Static Radial Rating C0 | 1,280,000 N | — |
| Load Center Spread : A | — | 72.1 mm |
| Extended Dynamic Rating Ce | 0 N | — |
| Constant :E | — | 0.52 |
| Static Axial Rating C0A | 1,940,000 N | — |
| Axial Load Factors : Y1 | — | 1.15 |
| Axial Load Factors : Y0 | — | 0.63 |
| Da | — | 270.0 mm |
| Db | — | 288.0 mm |
| Ra(Max.) | — | 3.6 mm |
| Rb(Max.) | — | 2.5 mm |
| Mass(Refer.) | — | 15.1 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.