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| Parameter | TIMKEN855 / 85288.9 × 190.5 × 57.15 mm | KOYO855R/85488.9 × 190.5 × 57.531 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | TIMKEN | KOYO |
| Designation | 855 / 852 | 855R/854 |
| Product family | TS - Tapered Single | Single-row / Inch series |
| Detailed type | Tapered roller bearings | Tapered roller bearings |
| Series | 855 | — |
| Bore diameterd | 88.9 mm | 88.9 mm |
| Outside diameterD | 190.5 mm | 190.5 mm |
| WidthB | 57.15 mm | 57.531 mm |
| Basic dynamic load ratingC | 458 kN | 482 kN |
| Basic static load ratingC0 | 630 kN | 565 kN |
| Fatigue load limitPu | — | 72.4 kN |
| Limiting speednG | — | 2100 r/min |
| Mass≈m | 7.8 kg | 7.71 kg |
| Calculation Factors | ||
| K Factor | 1.74 | — |
| Y1 Factor | 1.79 | — |
| Y2 Factor | -1.00 | — |
| Y0 Factor | 0.99 | — |
| E Factor | 0.33 | — |
| Cg Factor | 0.1072 | — |
| 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 | 100051878100051584 | — |
| Official Class Key | — | 050-010-020 |
| World Assembly Part Number | 855 / 852 | — |
| Inner Ring Part Number | 855 | — |
| Outer Ring Part Number | 852 | — |
| Official Source System | TS_PREPAIR | — |
| Official Last Run | 2026-08-23T00:00:00 | — |
| Product Identity | ||
| Type Description | TS - Tapered Single | — |
| Number Of Rows | 1 | — |
| Tapered Bore | N | — |
| Technical Data | ||
| d | — | 190.500 mm |
| Overall Width | 59.031 mm | — |
| T | — | 57.150 mm |
| Radial Rating | 119,000 N | — |
| B | — | 57.531 mm |
| Axial Rating | 68,000 N | — |
| C | — | 44.450 mm |
| Dynamic Rating C1 | 458,000 N | — |
| R(Min.) | — | 7.9 mm |
| Dynamic Rating C90 | 119,000 N | — |
| R1(Min.) | — | 3.2 mm |
| Dynamic Axial Rating Ca90 | 68,000 N | — |
| Basic Load Ratings : Cr | — | 482 kN |
| Dynamic Axial Rating Ca1 | 262,000 N | — |
| Basic Load Ratings : C0R | — | 565 kN |
| Static Radial Rating C0 | 630,000 N | — |
| Fatigue Load Limit : Cu | — | 72.4 kN |
| Extended Dynamic Rating Ce | 0 N | — |
| Limiting Speeds(Grease Lub.) | — | 2100 min-1 |
| Static Axial Rating C0A | 614,000 N | — |
| Limiting Speeds(Oil Lub.) | — | 2700 min-1 |
| Load Center Spread : A | — | 40.0 mm |
| Constant :E | — | 0.33 |
| Axial Load Factors : Y1 | — | 1.79 |
| Axial Load Factors : Y0 | — | 0.99 |
| Da | — | 170.0 mm |
| Db | — | 174.0 mm |
| Ra(Max.) | — | 7.9 mm |
| Rb(Max.) | — | 3.2 mm |
| Mass(Refer.) | — | 7.71 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.