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 744 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
2 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 | TIMKEN744A / 74269.85 × 150.089 × 44.45 mm | KOYO744R/74273.025 × 150.089 × 46.672 mm |
|---|---|---|
| Comparable specifications | ||
| Brand | TIMKEN | KOYO |
| Designation | 744A / 742 | 744R/742 |
| Product family | TS - Tapered Single | Single-row / Inch series |
| Detailed type | Tapered roller bearings | Tapered roller bearings |
| Series | 745 | — |
| Bore diameterd | 69.85 mm | 73.025 mm |
| Outside diameterD | 150.089 mm | 150.089 mm |
| WidthB | 44.45 mm | 46.672 mm |
| Basic dynamic load ratingC | 318 kN | 330 kN |
| Basic static load ratingC0 | 417 kN | 368 kN |
| Fatigue load limitPu | — | 50.1 kN |
| Limiting speednG | — | 2500 r/min |
| Mass≈m | 3.91 kg | 3.73 kg |
| Precision class | ABMA Class 2 | — |
| Sealing | Open | — |
| Cage | Steel cage | — |
| Calculation Factors | ||
| K Factor | 1.80 | — |
| Y1 Factor | 1.84 | — |
| Y2 Factor | 0.00 | — |
| Y0 Factor | 1.01 | — |
| E Factor | 0.33 | — |
| Cg Factor | 0.0898 | — |
| 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 | 000000000100375642 | — |
| Official Class Key | — | 050-010-020 |
| World Assembly Part Number | 744A_742 | — |
| Inner Ring Part Number | 744A | — |
| Outer Ring Part Number | 742 | — |
| Drawing Number | A-11212 | — |
| Upc | 0013992338211 | — |
| Official Source System | CORE BP - DS DF | — |
| Official Last Run | 2026-08-23T20:02:46.163 | — |
| Product Identity | ||
| Type Description | TS - Tapered Single | — |
| Construction | Single Row Tapered Roller Bearing Assembly | Imperial Series | 2.7500 in Bore | 5.9090 in OD | 1.7500 in Width | Open | Cylindrical Bore | Steel Cage | Precision ABMA Class 2 | — |
| Number Of Rows | 1 | — |
| Tapered Bore | N | — |
| Technical Data | ||
| d | — | 150.089 mm |
| T | — | 44.450 mm |
| B | — | 46.672 mm |
| C | — | 36.512 mm |
| Overall Width | 49.972 mm | — |
| R(Min.) | — | 3.6 mm |
| Radial Rating | 82,400 N | — |
| R1(Min.) | — | 3.2 mm |
| Axial Rating | 45,900 N | — |
| Basic Load Ratings : Cr | — | 330 kN |
| Dynamic Rating C1 | 318,000 N | — |
| Basic Load Ratings : C0R | — | 368 kN |
| Dynamic Rating C90 | 82,400 N | — |
| Fatigue Load Limit : Cu | — | 50.1 kN |
| Dynamic Axial Rating Ca90 | 45,900 N | — |
| Limiting Speeds(Grease Lub.) | — | 2500 min-1 |
| Dynamic Axial Rating Ca1 | 177,000 N | — |
| Limiting Speeds(Oil Lub.) | — | 3400 min-1 |
| Static Radial Rating C0 | 417,000 N | — |
| Load Center Spread : A | — | 32.4 mm |
| Extended Dynamic Rating Ce | 0 N | — |
| Constant :E | — | 0.33 |
| Static Axial Rating C0A | 395,000 N | — |
| Axial Load Factors : Y1 | — | 1.84 |
| Axial Load Factors : Y0 | — | 1.01 |
| Da | — | 134.0 mm |
| Db | — | 142.0 mm |
| Ra(Max.) | — | 3.6 mm |
| Rb(Max.) | — | 3.2 mm |
| Mass(Refer.) | — | 3.73 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.