Cross-brand designation analysis
COMPARE / VERIFY
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 6581X-6536. This table explores the base group 6581; it does not preserve or approve every requested suffix. Search your complete marking first →
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
“6581” across 3 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 | SKF6581 X/653590 × 161.925 × mm | TIMKEN6581X / 653590 × 161.925 × 53.974 mm | KOYO6581XR/3590 × 161.925 × 55.1 mm |
|---|---|---|---|
| Comparable specifications | |||
| Brand | SKF | TIMKEN | KOYO |
| Designation | 6581 X/6535 | 6581X / 6535 | 6581XR/35 |
| Product family | Tapered roller bearings | TS - Tapered Single | Single-row / Inch series |
| Detailed type | Single row tapered roller bearing | Tapered roller bearings | Tapered roller bearings |
| Series | — | 6500 | — |
| Bore diameterd | 90 mm | 90 mm | 90 mm |
| Outside diameterD | 161.925 mm | 161.925 mm | 161.925 mm |
| WidthB | — | 53.974 mm | 55.1 mm |
| Basic dynamic load ratingC | 404 kN | 439 kN | 395 kN |
| Basic static load ratingC0 | 510 kN | 523 kN | 471 kN |
| Fatigue load limitPu | 56 kN | — | 61.4 kN |
| Reference speednref | 3200 r/min | — | — |
| Limiting speednG | 4000 r/min | — | 2400 r/min |
| Mass≈m | 4.72 kg | 4.64 kg | 4.67 kg |
| Sealing | Without | — | — |
| Cage | Sheet metal | — | — |
| Lubricant | None | — | — |
| Calculation Factors | |||
| K Factor | — | 1.46 | — |
| Y1 Factor | — | 1.50 | — |
| Y2 Factor | — | -1.00 | — |
| Y0 Factor | — | 0.82 | — |
| E Factor | — | 0.40 | — |
| Cg Factor | — | 0.1037 | — |
| Classification | |||
| Official Category Path | — | — | Tapered roller bearings - Single-row - Inch series |
| Official Classification 1 | — | — | Tapered roller bearings / Single-row / Inch series |
| Dimensions | |||
| Width, total | 55.1 mm | — | — |
| Width, inner ring | 55.1 mm | — | — |
| Width, outer ring | 42.862 mm | — | — |
| Contact angle | 14.9 ° | — | — |
| Engineering — Abutment dimensions | |||
| Diameter of shaft abutmentd a | max. 102 mm | — | — |
| Diameter of shaft abutmentd b | min. 103.5 mm | — | — |
| Diameter of housing abutmentD a | max. 149 mm | — | — |
| Diameter of housing abutmentD b | min. 153 mm | — | — |
| Minimum width of space required in housing on large side faceC a | min. 8 mm | — | — |
| Minimum width of space required in housing on small side faceC b | min. 11 mm | — | — |
| Radius of shaft filletr a | max. 3 mm | — | — |
| Radius of housing filletr b | max. 3.3 mm | — | — |
| Engineering — Calculation data | |||
| SKF performance class | SKF Explorer | — | — |
| Limiting valuee | 0.4 | — | — |
| Calculation factorY | 1.5 | — | — |
| Calculation factorY 0 | 0.8 | — | — |
| Engineering — Dimensions | |||
| Bearing width, totalT | 53.975 mm | — | — |
| Shoulder diameter of inner ringd 1 | ≈ 125.1 mm | — | — |
| Width of inner ringB | 55.1 mm | — | — |
| Width of outer ringC | 42.862 mm | — | — |
| Chamfer dimension of inner ringr 1,2 | min. 3 mm | — | — |
| Chamfer dimension of outer ringr 3,4 | min. 3.3 mm | — | — |
| Distance side face to pressure pointa | 39.875 mm | — | — |
| Engineering — Engineering specifications | |||
| Dimension series | 6500 | — | — |
| Logistics | |||
| Product net weight | 4.72 kg | — | — |
| eClass code | 23-05-09-10 | — | — |
| UNSPSC code | 31171516 | — | — |
| Manufacturer Identity | |||
| Material Number | — | 100050093100044502 | — |
| Official Class Key | — | — | 050-010-020 |
| World Assembly Part Number | — | 6581X / 6535 | — |
| Inner Ring Part Number | — | 6581X | — |
| Outer Ring Part Number | — | 6535 | — |
| Official Source System | — | TS_PREPAIR | — |
| Official Last Run | — | 2026-08-23T00:00:00 | — |
| Product identity | |||
| Official product category | Tapered roller bearings | — | — |
| Official taxonomy path | /products/rolling-bearings/roller-bearings/tapered-roller-bearings/single-row-tapered-roller-bearings | — | — |
| Structure group ID | BT1_001_101 | — | — |
| Available from SKF | Yes | — | — |
| Remanufacturable | No | — | — |
| Product Identity | |||
| Type Description | — | TS - Tapered Single | — |
| Number Of Rows | 1 | 1 | — |
| Tapered Bore | — | N | — |
| Properties | |||
| Bearing part | Complete bearing | — | — |
| Locating feature, bearing outer ring | Without | — | — |
| Bore type | Cylindrical | — | — |
| Arrangement of contact angle (double-row bearing) | Not applicable | — | — |
| Matched arrangement | No | — | — |
| Coating | Without | — | — |
| Relubrication feature | Without | — | — |
| Unit system | Inch | — | — |
| Indicative carbon footprint for new product | 17.5 kg CO 2 e | — | — |
| Technical Data | |||
| d | — | — | 161.925 mm |
| Overall Width | — | 56.600 mm | — |
| T | — | — | 53.975 mm |
| Radial Rating | — | 114,000 N | — |
| B | — | — | 55.100 mm |
| Axial Rating | — | 78,100 N | — |
| C | — | — | 42.862 mm |
| Dynamic Rating C1 | — | 439,000 N | — |
| R(Min.) | — | — | 3.0 mm |
| Dynamic Rating C90 | — | 114,000 N | — |
| R1(Min.) | — | — | 3.2 mm |
| Dynamic Axial Rating Ca90 | — | 78,100 N | — |
| Basic Load Ratings : Cr | — | — | 395 kN |
| Dynamic Axial Rating Ca1 | — | 301,000 N | — |
| Basic Load Ratings : C0R | — | — | 471 kN |
| Static Radial Rating C0 | — | 523,000 N | — |
| Fatigue Load Limit : Cu | — | — | 61.4 kN |
| Extended Dynamic Rating Ce | — | 0 N | — |
| Limiting Speeds(Grease Lub.) | — | — | 2400 min-1 |
| Static Axial Rating C0A | — | 610,000 N | — |
| Limiting Speeds(Oil Lub.) | — | — | 3200 min-1 |
| Load Center Spread : A | — | — | 41.0 mm |
| Constant :E | — | — | 0.40 |
| Axial Load Factors : Y1 | — | — | 1.50 |
| Axial Load Factors : Y0 | — | — | 0.82 |
| Da | — | — | 141.0 mm |
| Db | — | — | 154.0 mm |
| Ra(Max.) | — | — | 3.0 mm |
| Rb(Max.) | — | — | 3.2 mm |
| Mass(Refer.) | — | — | 4.67 kg |
Automatic matching is a search aid, not an interchangeability declaration. Confirm the full suffix, tolerances, internal design and application limits before substitution.