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
“LM258649” 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 | TIMKENLM258649D-90029317.5 × 422.275 × 128.588 mm | KOYOLM258649D/610/610D317.5 × 422.275 × 269.875 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | TIMKEN | KOYO |
| Designation | LM258649D-90029 | LM258649D/610/610D |
| Product family | TDI - Tapered Double Inner | Four-row tapered roller bearings |
| Detailed type | Tapered roller bearings | Rolling mill roll neck bearings |
| Series | LM258600 | — |
| Bore diameterd | 317.5 mm | 317.5 mm |
| Outside diameterD | 422.275 mm | 422.275 mm |
| WidthB | 128.588 mm | 269.875 mm |
| Basic dynamic load ratingC | 1720 kN | 3140 kN |
| Basic static load ratingC0 | 4460 kN | 7450 kN |
| Fatigue load limitPu | — | 747 kN |
| Mass≈m | 50.26 kg | 104 kg |
| Precision class | ABMA Class 2 | — |
| Sealing | Open | — |
| Cage | Steel cage | — |
| Calculation Factors | ||
| K Factor | 1.83 | — |
| Y1 Factor | 2.11 | — |
| Y2 Factor | 3.15 | — |
| Y0 Factor | 2.07 | — |
| E Factor | 0.32 | — |
| Cg Factor | 0.1739 | — |
| 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 | 000000000100180865 | — |
| Official Class Key | — | 140-020-000 |
| World Assembly Part Number | LM258649D_LM258610 | — |
| Inner Ring Part Number | LM258649D | — |
| Outer Ring Part Number | LM258610 | — |
| Drawing Number | C-33763 | — |
| Upc | 0053893121826 | — |
| Official Source System | CORE BP - DS DF | — |
| Official Last Run | 2026-08-23T20:02:46.323 | — |
| Product Identity | ||
| Type Description | TDI - Tapered Double Inner | — |
| Construction | Double Row Tapered Roller Bearing Assembly | Imperial Series | 12.5000 in Bore | 16.6250 in OD | 5.0625 in Width | Open | Cylindrical Bore | Steel Cage | Precision ABMA Class 2 | — |
| Number Of Rows | 2 | — |
| Tapered Bore | N | — |
| Technical Data | ||
| d | — | 422.275 mm |
| T | — | 269.875 mm |
| W | — | 269.875 mm |
| R(Min.) | — | 3.2 mm |
| R1(Min.) | — | 1.6 mm |
| Overall Width | 0.000 mm | — |
| Basic Load Ratings : Cr | — | 3140 kN |
| Radial Rating | 445,000 N | — |
| Basic Load Ratings : C0R | — | 7450 kN |
| Axial Rating | 140,000 N | — |
| Fatigue Load Limit : Cu | — | 747 kN |
| Dynamic Rating C1 | 1,720,000 N | — |
| Axial Load Factors : Y2 | — | 2.12 mm |
| Dynamic Rating C90 | 445,000 N | — |
| Axial Load Factors : Y3 | — | 3.15 |
| Dynamic Axial Rating Ca90 | 140,000 N | — |
| Axial Load Factors : Y0 | — | 2.07 |
| Dynamic Axial Rating Ca1 | 539,000 N | — |
| Constant E | — | 0.32 |
| Static Radial Rating C0 | 4,460,000 N | — |
| Da(Min.) | — | 341 mm |
| Extended Dynamic Rating Ce | 0 N | — |
| Da(Max.) | — | 392 mm |
| Static Axial Rating C0A | 2,080,000 N | — |
| S(Min.) | — | 8.5 mm |
| Ra(Max.) | — | 3.2 mm |
| Rb(Max.) | — | 1.6 mm |
| Mass(Refer.) | — | 104 kg |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.