Technical data
Product specifications
Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.
Core specifications11 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Series | A4000 | |
| Variant / construction | TS - Tapered Single | |
| Bore diameter | d | 12.7 mm |
| Outside diameter | D | 34.988 mm |
| Width | B | 10.998 mm |
| Basic dynamic load rating | C | 15.6 kN |
| Basic static load rating | C0 | 11.5 kN |
| Mass | ≈m | 0.05 kg |
| Precision class | ABMA Class 0 | |
| Sealing | Open | |
| Cage | Steel cage |
Calculation Factors6 parameters
| Parameter | Symbol | Value |
|---|---|---|
| K Factor | 1.29 | |
| Y1 Factor | 1.32 | |
| Y2 Factor | 0.00 | |
| Y0 Factor | 0.73 | |
| E Factor | 0.45 | |
| Cg Factor | 0.0355 |
Manufacturer Identity9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Brand | Timken | |
| Material Number | 000000000100142701 | |
| World Assembly Part Number | NP870522_A4138 | |
| Inner Ring Part Number | NP870522 | |
| Outer Ring Part Number | A4138 | |
| Drawing Number | A-4370 | |
| Upc | 0053893001418 | |
| Official Source System | CORE BP - DS DF | |
| Official Last Run | 2026-08-23T20:02:47.163 |
Product Identity4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Type Description | TS - Tapered Single | |
| Construction | Precision Tapered Roller Bearing Assembly | Imperial Series | 0.5000 in Bore | 1.3775 in OD | 0.4330 in Width | Open | Cylindrical Bore | Steel Cage | Precision ABMA Class 0 | |
| Number Of Rows | 1 | |
| Tapered Bore | N |
Technical Data10 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Overall Width | 12.788 mm | |
| Radial Rating | 4,040 N | |
| Axial Rating | 3,130 N | |
| Dynamic Rating C1 | 15,600 N | |
| Dynamic Rating C90 | 4,040 N | |
| Dynamic Axial Rating Ca90 | 3,130 N | |
| Dynamic Axial Rating Ca1 | 12,100 N | |
| Static Radial Rating C0 | 11,500 N | |
| Extended Dynamic Rating Ce | 0 N | |
| Static Axial Rating C0A | 15,200 N |
