Choose the exact products yourself
CUSTOM / 08 MAX
Custom Comparison
Search a designation, choose up to eight exact suffix variants, and build your own side-by-side technical table.
Build your own set
Choose exact variants
For an automatic one-result-per-brand view, use Same-model Comparison. This page is for deliberate manual selection.
Auto-compare 6581 by brand →Model matches
Select products
The first result per loaded brand is preselected. Choose up to eight exact variants and update the table.
Technical comparison
3 products side by side
A dash means that the loaded manufacturer source did not provide that field. It does not mean the feature is absent.
| 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 |
Independent reference comparison based on the manufacturer data currently loaded. Always verify current limits, tolerances and suffix definitions with the official source before engineering selection.