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 | 30311 | |
| Variant / construction | TSF - Tapered Single Flanged | |
| Bore diameter | d | 55 mm |
| Outside diameter | D | 120 mm |
| Width | B | 12 mm |
| Basic dynamic load rating | C | 206 kN |
| Basic static load rating | C0 | 190 kN |
| Mass | ≈m | 1.66 kg |
| Precision class | ABMA Class K | |
| Sealing | Open | |
| Cage | Steel cage |
Calculation Factors6 parameters
| Parameter | Symbol | Value |
|---|---|---|
| K Factor | 1.69 | |
| Y1 Factor | 1.74 | |
| Y2 Factor | 0.00 | |
| Y0 Factor | 0.96 | |
| E Factor | 0.35 | |
| Cg Factor | 0.0628 |
Manufacturer Identity9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Brand | Timken | |
| Material Number | 000000000190072638 | |
| World Assembly Part Number | X30311G_Y30311RG | |
| Inner Ring Part Number | X30311G | |
| Outer Ring Part Number | Y30311RG | |
| Drawing Number | C-119970 | |
| Upc | 0013992409881 | |
| Official Source System | CORE BP - DS DF | |
| Official Last Run | 2026-08-23T20:02:47.387 |
Product Identity4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Type Description | TSF - Tapered Single Flanged | |
| Construction | Single Row Tapered Roller Bearing Assembly | Imperial Series | 2.1654 in Bore | 4.7244 in OD | 1.2402 in Width | Open | Cylindrical Bore | Steel Cage | Precision ABMA Class K | |
| Number Of Rows | 1 | |
| Tapered Bore | N |
Technical Data10 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Overall Width | 32.800 mm | |
| Radial Rating | 53,400 N | |
| Axial Rating | 31,600 N | |
| Dynamic Rating C1 | 206,000 N | |
| Dynamic Rating C90 | 53,400 N | |
| Dynamic Axial Rating Ca90 | 31,600 N | |
| Dynamic Axial Rating Ca1 | 122,000 N | |
| Static Radial Rating C0 | 190,000 N | |
| Extended Dynamic Rating Ce | 0 N | |
| Static Axial Rating C0A | 191,000 N |
