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| Parameter | TIMKEN98350-9002088.9 × 200.025 × 115.888 mm | KOYO98350/78888.9 × 200 × 49.212 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | TIMKEN | KOYO |
| Designation | 98350-90020 | 98350/788 |
| Product family | TDO - Tapered Double Outer | Single-row / Inch series |
| Detailed type | Tapered roller bearings | Tapered roller bearings |
| Series | 98000 | — |
| Bore diameterd | 88.9 mm | 88.9 mm |
| Outside diameterD | 200.025 mm | 200 mm |
| WidthB | 115.888 mm | 49.212 mm |
| Basic dynamic load ratingC | 839 kN | 433 kN |
| Basic static load ratingC0 | 1040 kN | 471 kN |
| Fatigue load limitPu | — | 58.8 kN |
| Limiting speednG | — | 1400 r/min |
| Mass≈m | 16.32 kg | 7.55 kg |
| Precision class | ABMA Class 2 | — |
| Sealing | Open | — |
| Cage | Steel cage | — |
| Calculation Factors | ||
| K Factor | 0.92 | — |
| Y1 Factor | 1.07 | — |
| Y2 Factor | 1.59 | — |
| Y0 Factor | 1.04 | — |
| E Factor | 0.63 | — |
| Cg Factor | 0.1197 | — |
| 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 | 000000000100024687 | — |
| Official Class Key | — | 050-010-020 |
| World Assembly Part Number | 98350_98789D | — |
| Inner Ring Part Number | 98350 | — |
| Outer Ring Part Number | 98789D | — |
| Drawing Number | A-26997 | — |
| Upc | 0053893797830 | — |
| Official Source System | CORE BP - DS DF | — |
| Official Last Run | 2026-08-23T20:02:47.577 | — |
| Product Identity | ||
| Type Description | TDO - Tapered Double Outer | — |
| Construction | Double Row Tapered Roller Bearing Assembly | Imperial Series | 3.5000 in Bore | 7.8750 in OD | 4.5625 in Width | Open | Cylindrical Bore | Steel Cage | Precision ABMA Class 2 | — |
| Number Of Rows | 2 | — |
| Tapered Bore | N | — |
| Technical Data | ||
| d | — | 200.000 mm |
| T | — | 52.761 mm |
| B | — | 49.212 mm |
| C | — | 34.925 mm |
| Overall Width | 0.000 mm | — |
| R(Min.) | — | 3.6 mm |
| Radial Rating | 217,000 N | — |
| R1(Min.) | — | 3.2 mm |
| Axial Rating | 135,000 N | — |
| Basic Load Ratings : Cr | — | 433 kN |
| Dynamic Rating C1 | 839,000 N | — |
| Basic Load Ratings : C0R | — | 471 kN |
| Dynamic Rating C90 | 217,000 N | — |
| Fatigue Load Limit : Cu | — | 58.8 kN |
| Dynamic Axial Rating Ca90 | 135,000 N | — |
| Limiting Speeds(Grease Lub.) | — | 1400 min-1 |
| Dynamic Axial Rating Ca1 | 521,000 N | — |
| Limiting Speeds(Oil Lub.) | — | 1900 min-1 |
| Static Radial Rating C0 | 1,040,000 N | — |
| Load Center Spread : A | — | 54.5 mm |
| Extended Dynamic Rating Ce | 0 N | — |
| Constant :E | — | 0.63 |
| Static Axial Rating C0A | 956,000 N | — |
| Axial Load Factors : Y1 | — | 0.95 |
| Axial Load Factors : Y0 | — | 0.52 |
| Da | — | 174.0 mm |
| Db | — | 188.0 mm |
| Ra(Max.) | — | 3.6 mm |
| Rb(Max.) | — | 3.2 mm |
| Mass(Refer.) | — | 7.55 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.