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 | 240 mm |
| Outside diameter | D | 320 mm |
| Width | B | 76 mm |
| Basic dynamic load rating | C | 351 kN |
| Basic static load rating | C0 | 610 kN |
| Fatigue load limit | Pu | 15.6 kN |
| Mass | ≈m | 14.2 kg |
| Sealing | Without | |
| Bearing material | Bearing steel | |
| Lubricant | None |
Dimensions4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | 240.0 mm | |
| Outside diameter | 320.0 mm | |
| Width | 76.0 mm | |
| Contact angle | 25.0 ° |
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 dimensions5 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Diameter of shaft abutment | d a | min. 251 mm |
| Diameter of housing abutment | D b | max. 315 mm |
| Radius of fillet | r a | max. 2 mm |
| Radius of fillet | r b | max. 1 mm |
| Position of oil nozzle | d n | 271.4 mm |
Engineering — Calculation data10 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Basic dynamic load rating | C | 351 kN |
| Basic static load rating | C 0 | 610 kN |
| Fatigue load limit | P u | 15.6 kN |
| Attainable speed for grease lubrication | To be calculated: Single bearing (3600) x speed reduction factor (see table below) | |
| Attainable speed for oil-air lubrication | To be calculated: Single bearing (5300) x speed reduction factor (see table below) | |
| Contact angle | α | 25 ° |
| Ball diameter | D w | 25.4 mm |
| Number of rows | i | 2 |
| Number of balls (per bearing) | z | 31 |
| Reference grease quantity (per bearing) | G ref | 93 cm³ |
Engineering — Calculation data — Correction factors for preload calculation4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Correction factor dependent on bearing series and size | f | 1.3 |
| Correction factor dependent on contact angle | f 1 | 0.98 |
| Correction factor, preload class C | f 2C | 1.1 |
| Correction factor for hybrid bearings | f HC | 1 |
Engineering — Calculation data — Factors for equivalent bearing load calculation6 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Axial load factor (back-to-back, face-to-face) | Y 1 | 0.92 |
| Axial load factor (back-to-back, face-to-face) | Y 2 | 1.4 |
| Axial load factor (back-to-back, face-to-face) | Y 0 | 0.76 |
| Radial load factor (back-to-back, face-to-face) | X 1 | 1 |
| Radial load factor (back-to-back, face-to-face) | X 2 | 0.67 |
| Radial load factor (back-to-back, face-to-face) | X 0 | 1 |
Engineering — Calculation data — Preload and stiffness (back-to-back, face-to-face)3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Preload class | C | |
| Preload | G | 5400 N |
| Axial stiffness | 1029 N/µm |
Engineering — Dimensions6 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 240 mm |
| Outside diameter | D | 320 mm |
| Width | B | 76 mm |
| Shoulder diameter of inner ring (large side face) | d 1 | 264.7 mm |
| Chamfer dimension | r 1,2 | min. 2.1 mm |
| Chamfer dimension | r 3,4 | min. 1 mm |
Engineering — Engineering specifications1 parameter
| Parameter | Symbol | Value |
|---|---|---|
| Universal matching bearing(s) | No |
Logistics3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Product net weight | 14.2 kg | |
| eClass code | 23-05-08-04 | |
| UNSPSC code | 31171531 |
Performance3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Basic dynamic load rating | 351.0 kN | |
| Basic static load rating | 610.0 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-capacity D | |
| Universal matching bearing | No | |
| Matched arrangement | Back-to-back <> | |
| Number of bearings in matched set | 2 | |
| Matched condition (axial clearance/ preload) | Moderate preload | |
| Tolerance class | P4A | |
| Material, bearing | Bearing steel | |
| Coating | Without | |
| Sealing | Without | |
| Lubricant | None | |
| Indicative carbon footprint for new product | 52.6 kg CO 2 e |
