Cross-brand designation analysis
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Same-model Comparison
Explore products that share a base designation across loaded brands, with dimensional agreement and data gaps shown clearly.
Automatic candidate selection
One base designation across loaded brands
Exact designations rank first. Dimensions, suffixes and other technical differences remain visible so the result is not mistaken for an interchangeability declaration.
Dimensions differ
“180” across 2 loaded brands
The base designation is shared, but the loaded boundary dimensions do not agree. Use Custom Compare when you want to choose exact suffix variants yourself.
Technical comparison
Choose exact variants instead →Brand differences at a glance
| 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 | — |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.