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 verified
“681” across 2 loaded brands
At least two brands share the same bore, outside diameter and width. Use Custom Compare when you want to choose exact suffix variants yourself.
Technical comparison
Choose exact variants instead →Brand differences at a glance
| Parameter | TIMKEN681A / 67292.075 × 168.275 × 41.275 mm | KOYO681A/67292.075 × 168.275 × 41.275 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | TIMKEN | KOYO |
| Designation | 681A / 672 | 681A/672 |
| Product family | TS - Tapered Single | Single-row / Inch series |
| Detailed type | Tapered roller bearings | Tapered roller bearings |
| Series | 675 | — |
| Bore diameterd | 92.075 mm | 92.075 mm |
| Outside diameterD | 168.275 mm | 168.275 mm |
| WidthB | 41.275 mm | 41.275 mm |
| Basic dynamic load ratingC | 265 kN | 282 kN |
| Basic static load ratingC0 | 386 kN | 349 kN |
| Fatigue load limitPu | — | 50.4 kN |
| Limiting speednG | — | 2200 r/min |
| Mass≈m | 3.81 kg | 3.82 kg |
| Calculation Factors | ||
| K Factor | 1.24 | — |
| Y1 Factor | 1.28 | — |
| Y2 Factor | -1.00 | — |
| Y0 Factor | 0.70 | — |
| E Factor | 0.47 | — |
| Cg Factor | 0.1056 | — |
| 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 | 100050784100045765 | — |
| Official Class Key | — | 050-010-020 |
| World Assembly Part Number | 681A / 672 | — |
| Inner Ring Part Number | 681A | — |
| Outer Ring Part Number | 672 | — |
| Official Source System | TS_PREPAIR | — |
| Official Last Run | 2026-08-23T00:00:00 | — |
| Product Identity | ||
| Type Description | TS - Tapered Single | — |
| Number Of Rows | 1 | — |
| Tapered Bore | N | — |
| Technical Data | ||
| d | — | 168.275 mm |
| Overall Width | 44.275 mm | — |
| T | — | 41.275 mm |
| Radial Rating | 68,600 N | — |
| B | — | 41.275 mm |
| Axial Rating | 55,300 N | — |
| C | — | 30.162 mm |
| Dynamic Rating C1 | 265,000 N | — |
| R(Min.) | — | 6.4 mm |
| Dynamic Rating C90 | 68,600 N | — |
| R1(Min.) | — | 3.2 mm |
| Dynamic Axial Rating Ca90 | 55,300 N | — |
| Basic Load Ratings : Cr | — | 282 kN |
| Dynamic Axial Rating Ca1 | 213,000 N | — |
| Basic Load Ratings : C0R | — | 349 kN |
| Static Radial Rating C0 | 386,000 N | — |
| Fatigue Load Limit : Cu | — | 50.4 kN |
| Extended Dynamic Rating Ce | 0 N | — |
| Limiting Speeds(Grease Lub.) | — | 2200 min-1 |
| Static Axial Rating C0A | 529,000 N | — |
| Limiting Speeds(Oil Lub.) | — | 3000 min-1 |
| Load Center Spread : A | — | 38.6 mm |
| Constant :E | — | 0.47 |
| Axial Load Factors : Y1 | — | 1.28 |
| Axial Load Factors : Y0 | — | 0.70 |
| Da | — | 149.0 mm |
| Db | — | 160.0 mm |
| Ra(Max.) | — | 6.4 mm |
| Rb(Max.) | — | 3.2 mm |
| Mass(Refer.) | — | 3.82 kg |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.