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| Parameter | TIMKEN581D-9009480.962 × 139.992 × 80.962 mm | KOYO581R/57280.962 × 139.992 × 36.098 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | TIMKEN | KOYO |
| Designation | 581D-90094 | 581R/572 |
| Product family | TDI - Tapered Double Inner | Single-row / Inch series |
| Detailed type | Tapered roller bearings | Tapered roller bearings |
| Series | 575 | — |
| Bore diameterd | 80.962 mm | 80.962 mm |
| Outside diameterD | 139.992 mm | 139.992 mm |
| WidthB | 80.962 mm | 36.098 mm |
| Basic dynamic load ratingC | 360 kN | 220 kN |
| Basic static load ratingC0 | 582 kN | 262 kN |
| Fatigue load limitPu | — | 39.8 kN |
| Limiting speednG | — | 2700 r/min |
| Mass≈m | 5.22 kg | 2.249 kg |
| Precision class | ABMA Class 2 | — |
| Sealing | Open | — |
| Cage | Steel cage | — |
| Calculation Factors | ||
| K Factor | 1.45 | — |
| Y1 Factor | 1.67 | — |
| Y2 Factor | 2.49 | — |
| Y0 Factor | 1.63 | — |
| E Factor | 0.40 | — |
| Cg Factor | 0.1295 | — |
| 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 | 000000000100060184 | — |
| Official Class Key | — | 050-010-020 |
| World Assembly Part Number | 581D_572 | — |
| Inner Ring Part Number | 581D | — |
| Outer Ring Part Number | 572 | — |
| Drawing Number | A-6775 | — |
| Upc | 0053893063423 | — |
| Official Source System | CORE BP - DS DF | — |
| Official Last Run | 2026-08-23T20:02:47.273 | — |
| Product Identity | ||
| Type Description | TDI - Tapered Double Inner | — |
| Construction | Double Row Tapered Roller Bearing Assembly | Imperial Series | 3.1875 in Bore | 5.5115 in OD | 3.1875 in Width | Open | Cylindrical Bore | Steel Cage | Precision ABMA Class 2 | — |
| Number Of Rows | 2 | — |
| Tapered Bore | N | — |
| Technical Data | ||
| d | — | 139.992 mm |
| T | — | 36.512 mm |
| B | — | 36.098 mm |
| C | — | 28.575 mm |
| Overall Width | 0.000 mm | — |
| R(Min.) | — | 3.6 mm |
| Radial Rating | 93,400 N | — |
| R1(Min.) | — | 3.2 mm |
| Axial Rating | 37,100 N | — |
| Basic Load Ratings : Cr | — | 220 kN |
| Dynamic Rating C1 | 360,000 N | — |
| Basic Load Ratings : C0R | — | 262 kN |
| Dynamic Rating C90 | 93,400 N | — |
| Fatigue Load Limit : Cu | — | 39.8 kN |
| Dynamic Axial Rating Ca90 | 37,100 N | — |
| Limiting Speeds(Grease Lub.) | — | 2700 min-1 |
| Dynamic Axial Rating Ca1 | 143,000 N | — |
| Limiting Speeds(Oil Lub.) | — | 3600 min-1 |
| Static Radial Rating C0 | 582,000 N | — |
| Load Center Spread : A | — | 31.0 mm |
| Extended Dynamic Rating Ce | 0 N | — |
| Constant :E | — | 0.40 |
| Static Axial Rating C0A | 342,000 N | — |
| Axial Load Factors : Y1 | — | 1.49 |
| Axial Load Factors : Y0 | — | 0.82 |
| Da | — | 125.0 mm |
| Db | — | 133.0 mm |
| Ra(Max.) | — | 3.6 mm |
| Rb(Max.) | — | 3.2 mm |
| Mass(Refer.) | — | 2.249 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.