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 |
|---|---|---|
| Variant / construction | Super-precision angular contact ball bearings | |
| Bore diameter | d | 55 mm |
| Outside diameter | D | 80 mm |
| Width | B | 26 mm |
| Basic dynamic load rating | C | 25.1 kN |
| Basic static load rating | C0 | 20.8 kN |
| Fatigue load limit | Pu | 0.64 kN |
| Mass | ≈m | 0.297 kg |
| Sealing | Without | |
| Bearing material | Hybrid (ceramic balls) | |
| Lubricant | None |
Dimensions4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | 55.0 mm | |
| Outside diameter | 80.0 mm | |
| Width | 26.0 mm | |
| Contact angle | 18.0 ° |
Product identity5 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Official product category | Super-precision angular contact ball bearings | |
| Official taxonomy path | /products/super-precision-bearings/angular-contact-ball-bearings | |
| Structure group ID | BA1_010 | |
| Available from SKF | Yes | |
| Remanufacturable | No |
Engineering — Abutment dimensions7 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Diameter of shaft abutment | d a | min. 59.6 mm |
| Diameter of shaft abutment | d b | min. 57 mm |
| Diameter of housing abutment | D a | max. 75.4 mm |
| Diameter of housing abutment | D b | max. 78 mm |
| Radius of fillet | r a | max. 1 mm |
| Radius of fillet | r b | max. 0.3 mm |
| Position of oil nozzle | d n | 64.6 mm |
Engineering — Calculation data10 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Basic dynamic load rating | C | 25.1 kN |
| Basic static load rating | C 0 | 20.8 kN |
| Fatigue load limit | P u | 0.64 kN |
| Attainable speed for grease lubrication | To be calculated: Single bearing (26500) x speed reduction factor (see table below) | |
| Attainable speed for oil-air lubrication | To be calculated: Single bearing (41000) x speed reduction factor (see table below) | |
| Contact angle | α | 18 ° |
| Ball diameter | D w | 7.938 mm |
| Number of rows | i | 2 |
| Number of balls (per bearing) | z | 21 |
| Reference grease quantity (per bearing) | G ref | 2.3 cm³ |
Engineering — Calculation data — Correction factors for preload calculation3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Correction factor dependent on bearing series and size | f | 1.2 |
| Correction factor dependent on contact angle | f 1 | 1 |
| Correction factor for hybrid bearings | f HC | 1 |
Engineering — Calculation data — Factors for equivalent bearing load calculation2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Calculation factor for equivalent loads | f 0 | 8.3 |
| Additional factors for equivalent loads | Refer to Notes 1 and 2 below |
Engineering — Dimensions8 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 55 mm |
| Outside diameter | D | 80 mm |
| Width | B | 26 mm |
| Shoulder diameter of inner ring (large side face) | d 1 | 62.75 mm |
| Shoulder diameter of inner ring (small side face) | d 2 | 60.7 mm |
| Shoulder diameter of outer ring (large side face) | D 1 | 72.3 mm |
| Chamfer dimension | r 1,2 | min. 1 mm |
| Chamfer dimension | r 3,4 | min. 0.3 mm |
Engineering — Engineering specifications1 parameter
| Parameter | Symbol | Value |
|---|---|---|
| Universal matching bearing(s) | No |
Logistics3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Product net weight | 0.297 kg | |
| eClass code | 23-05-08-03 | |
| UNSPSC code | 31171531 |
Performance3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Basic dynamic load rating | 25.1 kN | |
| Basic static load rating | 20.8 kN | |
| Note | Refer to catalogue data or contact SKF for the attainable speeds |
Properties14 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Contact type | Normal contact (two-point contact) | |
| Number of rows | 2 | |
| Ring type | One-piece inner and outer rings | |
| Design | High-speed E | |
| Universal matching bearing | No | |
| Matched arrangement | Tandem << | |
| Number of bearings in matched set | 2 | |
| Matched condition (axial clearance/ preload) | Not applicable | |
| Tolerance class | P4A | |
| Material, bearing | Hybrid (ceramic balls) | |
| Coating | Without | |
| Sealing | Without | |
| Lubricant | None | |
| Indicative carbon footprint for new product | 1.1 kg CO 2 e |