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| Parameter | TIMKENM238849 / M238810187.325 × 269.875 × 55.562 mm | KOYOM238849D/810/810D187.325 × 269.875 × 211.138 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | TIMKEN | KOYO |
| Designation | M238849 / M238810 | M238849D/810/810D |
| Product family | TS - Tapered Single | Four-row tapered roller bearings |
| Detailed type | Tapered roller bearings | Rolling mill roll neck bearings |
| Series | M238800 | — |
| Bore diameterd | 187.325 mm | 187.325 mm |
| Outside diameterD | 269.875 mm | 269.875 mm |
| WidthB | 55.562 mm | 211.138 mm |
| Basic dynamic load ratingC | 548 kN | 1510 kN |
| Basic static load ratingC0 | 999 kN | 3220 kN |
| Fatigue load limitPu | — | 367 kN |
| Mass≈m | 9.85 kg | 39.5 kg |
| Precision class | ABMA Class 2 | — |
| Sealing | Open | — |
| Cage | Steel cage | — |
| Calculation Factors | ||
| K Factor | 1.76 | — |
| Y1 Factor | 1.80 | — |
| Y2 Factor | 0.00 | — |
| Y0 Factor | 0.99 | — |
| E Factor | 0.33 | — |
| Cg Factor | 0.1201 | — |
| Classification | ||
| Official Category Path | — | Rolling mill roll neck bearings - Four-row tapered roller bearings |
| Official Classification 1 | — | Rolling mill roll neck bearings / Four-row tapered roller bearings |
| Manufacturer Identity | ||
| Material Number | 000000000100375556 | — |
| Official Class Key | — | 140-020-000 |
| World Assembly Part Number | M238849_M238810 | — |
| Inner Ring Part Number | M238849 | — |
| Outer Ring Part Number | M238810 | — |
| Drawing Number | B-35486 | — |
| Upc | 0053893790732 | — |
| Official Source System | CORE BP - DS DF | — |
| Official Last Run | 2026-08-23T20:02:47.287 | — |
| Product Identity | ||
| Type Description | TS - Tapered Single | — |
| Construction | Single Row Tapered Roller Bearing Assembly | Imperial Series | 7.3750 in Bore | 10.6250 in OD | 2.1875 in Width | Open | Cylindrical Bore | Steel Cage | Precision ABMA Class 2 | — |
| Number Of Rows | 1 | — |
| Tapered Bore | N | — |
| Technical Data | ||
| d | — | 269.875 mm |
| T | — | 211.138 mm |
| W | — | 211.138 mm |
| R(Min.) | — | 3.2 mm |
| R1(Min.) | — | 1.6 mm |
| Overall Width | 63.862 mm | — |
| Basic Load Ratings : Cr | — | 1510 kN |
| Radial Rating | 142,000 N | — |
| Basic Load Ratings : C0R | — | 3220 kN |
| Axial Rating | 80,900 N | — |
| Fatigue Load Limit : Cu | — | 367 kN |
| Dynamic Rating C1 | 548,000 N | — |
| Axial Load Factors : Y2 | — | 2.03 mm |
| Dynamic Rating C90 | 142,000 N | — |
| Axial Load Factors : Y3 | — | 3.02 |
| Dynamic Axial Rating Ca90 | 80,900 N | — |
| Axial Load Factors : Y0 | — | 1.98 |
| Dynamic Axial Rating Ca1 | 312,000 N | — |
| Constant E | — | 0.33 |
| Static Radial Rating C0 | 999,000 N | — |
| Da(Min.) | — | 206 mm |
| Extended Dynamic Rating Ce | 0 N | — |
| Da(Max.) | — | 245 mm |
| Static Axial Rating C0A | 968,000 N | — |
| S(Min.) | — | 5 mm |
| Ra(Max.) | — | 3.2 mm |
| Rb(Max.) | — | 1.6 mm |
| Mass(Refer.) | — | 39.5 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.