Same-model Comparison
Explore products that share a base designation across loaded brands, with dimensional agreement and data gaps shown clearly.
Cross Reference centre · Interchange verification checklist · Understand suffix differences
You entered 3578SLH-903A1. This table explores the base group 3578; it does not preserve or approve every requested suffix. Search your complete marking first →
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.
“3578” 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.
Brand differences at a glance
| Parameter | TIMKEN3578A / 352544.45 × 87.312 × 30.162 mm | KOYO3578R/2044.45 × 84.138 × 30.886 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | TIMKEN | KOYO |
| Designation | 3578A / 3525 | 3578R/20 |
| Product family | TS - Tapered Single | Single-row / Inch series |
| Detailed type | Tapered roller bearings | Tapered roller bearings |
| Series | 3500 | — |
| Bore diameterd | 44.45 mm | 44.45 mm |
| Outside diameterD | 87.312 mm | 84.138 mm |
| WidthB | 30.162 mm | 30.886 mm |
| Basic dynamic load ratingC | 113 kN | 120 kN |
| Basic static load ratingC0 | 134 kN | 120 kN |
| Fatigue load limitPu | — | 18.2 kN |
| Limiting speednG | — | 4600 r/min |
| Mass≈m | 0.76 kg | 0.7 kg |
| Precision class | ABMA Class 2 | — |
| Sealing | Open | — |
| Cage | Steel cage | — |
| Calculation Factors | ||
| K Factor | 1.91 | — |
| Y1 Factor | 1.96 | — |
| Y2 Factor | 0.00 | — |
| Y0 Factor | 1.08 | — |
| E Factor | 0.31 | — |
| Cg Factor | 0.0808 | — |
| 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 | 000000000100373103 | — |
| Official Class Key | — | 050-010-020 |
| World Assembly Part Number | 3578A_3525 | — |
| Inner Ring Part Number | 3578A | — |
| Outer Ring Part Number | 3525 | — |
| Drawing Number | A-31143 | — |
| Upc | 0013992327253 | — |
| Official Source System | CORE BP - DS DF | — |
| Official Last Run | 2026-08-23T20:02:47.15 | — |
| Product Identity | ||
| Type Description | TS - Tapered Single | — |
| Construction | Single Row Tapered Roller Bearing Assembly | Imperial Series | 1.7500 in Bore | 3.4375 in OD | 1.1875 in Width | Open | Cylindrical Bore | Steel Cage | Precision ABMA Class 2 | — |
| Number Of Rows | 1 | — |
| Tapered Bore | N | — |
| Technical Data | ||
| d | — | 84.138 mm |
| T | — | 30.162 mm |
| B | — | 30.886 mm |
| C | — | 23.812 mm |
| Overall Width | 33.986 mm | — |
| R(Min.) | — | 3.6 mm |
| Radial Rating | 29,400 N | — |
| R1(Min.) | — | 3.2 mm |
| Axial Rating | 15,400 N | — |
| Basic Load Ratings : Cr | — | 120 kN |
| Dynamic Rating C1 | 113,000 N | — |
| Basic Load Ratings : C0R | — | 120 kN |
| Dynamic Rating C90 | 29,400 N | — |
| Fatigue Load Limit : Cu | — | 18.2 kN |
| Dynamic Axial Rating Ca90 | 15,400 N | — |
| Limiting Speeds(Grease Lub.) | — | 4600 min-1 |
| Dynamic Axial Rating Ca1 | 59,400 N | — |
| Limiting Speeds(Oil Lub.) | — | 6200 min-1 |
| Static Radial Rating C0 | 134,000 N | — |
| Load Center Spread : A | — | 20.5 mm |
| Extended Dynamic Rating Ce | 0 N | — |
| Constant :E | — | 0.31 |
| Static Axial Rating C0A | 119,000 N | — |
| Axial Load Factors : Y1 | — | 1.96 |
| Axial Load Factors : Y0 | — | 1.08 |
| Da | — | 74.0 mm |
| Db | — | 79.5 mm |
| Ra(Max.) | — | 3.6 mm |
| Rb(Max.) | — | 3.2 mm |
| Mass(Refer.) | — | 0.7 kg |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.