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| Parameter | TIMKEN180RN91 R3180 × 280 × 82.55 mm | KOYO180FC122840900 × 1220 × 840 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | TIMKEN | KOYO |
| Designation | 180RN91 R3 | 180FC122840 |
| Product family | Cylindrical 1-Row | Four-row cylindrical roller bearings |
| Detailed type | Cylindrical roller bearings | Rolling mill roll neck bearings |
| Series | EX27973 | — |
| Bore diameterd | 180 mm | 900 mm |
| Outside diameterD | 280 mm | 1220 mm |
| WidthB | 82.55 mm | 840 mm |
| Basic dynamic load ratingC | 954 kN | 30000 kN |
| Basic static load ratingC0 | 1440 kN | 83100 kN |
| Fatigue load limitPu | — | 6240 kN |
| Mass≈m | 19 kg | 2980 kg |
| Sealing | Open | — |
| Cage | Window Brass cage | — |
| Calculation Factors | ||
| K Factor | 0.00 | — |
| Y1 Factor | 0.00 | — |
| Y2 Factor | 0.00 | — |
| Y0 Factor | 0.00 | — |
| E Factor | 0.00 | — |
| Cg Factor | 0.1409 | — |
| Classification | ||
| Official Category Path | — | Rolling mill roll neck bearings - Four-row cylindrical roller bearings |
| Official Classification 1 | — | Rolling mill roll neck bearings / Four-row cylindrical roller bearings |
| Manufacturer Identity | ||
| Material Number | 000000000100120928 | — |
| Official Class Key | — | 140-010-000 |
| World Assembly Part Number | 180RN91 | — |
| Inner Ring Part Number | 180ARNT91 | — |
| Outer Ring Part Number | 180ERNT91 | — |
| Drawing Number | M900213 | — |
| Upc | 0085706323592 | — |
| Official Source System | CORE BP - DS DF | — |
| Official Last Run | 2026-08-23T20:02:46.733 | — |
| Product Identity | ||
| Type Description | Cylindrical 1-Row | — |
| Construction | Single Row Cylindrical Roller Bearing | Imperial Series | 7.0866 in Bore | 11.0236 in OD | 3.2500 in Width | Open | Cylindrical Bore | Machined Window Brass Cage | R3 Clearance | — |
| Number Of Rows | 1 | — |
| Tapered Bore | N | — |
| Technical Data | ||
| d | — | 1220 mm |
| B | — | 840 mm |
| C | — | 840 mm |
| Fw | — | 981 mm |
| R(Min.) | — | 7.5 mm |
| Overall Width | 0.000 mm | — |
| R1(Min.) | — | 7.5 mm |
| Radial Rating | 954,000 N | — |
| Basic Load Ratings : Cr | — | 30000 kN |
| Axial Rating | 0 N | — |
| Basic Load Ratings : C0R | — | 83100 kN |
| Dynamic Rating C1 | 954,000 N | — |
| Fatigue Load Limit : Cu | — | 6240 kN |
| Dynamic Rating C90 | 0 N | — |
| Da(Min.) | — | 1146 mm |
| Dynamic Axial Rating Ca90 | 0 N | — |
| Da(Max.) | — | 1184 mm |
| Dynamic Axial Rating Ca1 | 0 N | — |
| Ra(Max.) | — | 6 mm |
| Static Radial Rating C0 | 1,440,000 N | — |
| Rb(Max.) | — | 6 mm |
| Extended Dynamic Rating Ce | 0 N | — |
| Mass(Refer.) | — | 2980 kg |
| Static Axial Rating C0A | 0 N | — |
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.