Technical data
Product specifications
Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.
Core specifications12 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Variant / construction | Super-precision angular contact thrust ball bearings | |
| Bore diameter | d | 55 mm |
| Outside diameter | D | 90 mm |
| Height | H | 44 mm |
| Basic dynamic load rating | C | 30.2 kN |
| Basic static load rating | C0 | 80 kN |
| Fatigue load limit | Pu | 3.8 kN |
| Mass | ≈m | 0.865 kg |
| Sealing | Without | |
| Cage | Non-metallic | |
| Bearing material | Bearing steel | |
| Lubricant | None |
Dimensions4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | 55.0 mm | |
| Outside diameter | 90.0 mm | |
| Height | 44.0 mm | |
| Contact angle | 60.0 ° |
Product identity5 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Official product category | Super-precision angular contact thrust ball bearings | |
| Official taxonomy path | /products/super-precision-bearings/double-direction-acthbb | |
| Structure group ID | BEA_010 | |
| Available from SKF | Yes | |
| Remanufacturable | No |
Engineering — Abutment dimensions5 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Abutment diameter shaft | d a | min. 68 mm |
| Abutment diameter shaft | D a | min. 84 mm |
| Abutment diameter housing | D a | max. 85 mm |
| Fillet radius | r a | max. 1 mm |
| Fillet radius | r b | max. 0.6 mm |
Engineering — Calculation data12 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Basic dynamic load rating | C | 30.2 kN |
| Basic static load rating | C 0 | 80 kN |
| Fatigue load limit | P u | 3.8 kN |
| Attainable speed for grease lubrication | 7500 r/min | |
| Attainable speed for oil-air lubrication | 9000 r/min | |
| Contact angle | α | 60 ° |
| Ball diameter | D w | 7.5 mm |
| Number of rolling element rows | i | 2 |
| Number of balls (per bearing) | z | 24 |
| Reference grease quantity | G ref | 4.8 cm³ |
| Preload | 440 N | |
| Static axial stiffness | 580 N/µm |
Engineering — Calculation data — Preload and stiffness1 parameter
| Parameter | Symbol | Value |
|---|---|---|
| Axial stiffness for preload A (sets of two brgs back-to-back or face-to-face) | 580 N/µm |
Engineering — Dimensions8 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 55 mm |
| Outside diameter | D | 90 mm |
| Height | H | 44 mm |
| Shoulder diameter shaft washer (high shoulder) | d 1 | 75.2 mm |
| Shoulder diameter housing washer (low shoulder) | D 1 | 84 mm |
| Height of both housing washers | 2C | 22 mm |
| Shaft washer chamfer radius | r 1,2 | min. 1.1 mm |
| Housing washer small chamfer radius | r 3,4 | min. 0.6 mm |
Logistics3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Product net weight | 0.865 kg | |
| eClass code | 23-05-10-02 | |
| UNSPSC code | 31171531 |
Performance4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Basic dynamic load rating | 30.2 kN | |
| Basic static load rating | 80.0 kN | |
| Attainable speed for grease lubrication | 7500.0 r/min | |
| Attainable speed for oil-air lubrication | 9000.0 r/min |
Properties13 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Axial load capability | Double-direction | |
| Number of rows | 2 | |
| Locating feature, bearing outer ring | Without | |
| Design | Basic (BTW series) | |
| Housing washer type (double-row angular contact thrust ball bearings) | Two-piece | |
| Cage | Non-metallic | |
| Tolerance class | SP | |
| Material, bearing | Bearing steel | |
| Coating | Without | |
| Sealing | Without | |
| Lubricant | None | |
| Relubrication feature | Without | |
| Indicative carbon footprint for new product | 3.2 kg CO 2 e |