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 | 52 mm |
| Basic dynamic load rating | C | 40.3 kN |
| Basic static load rating | C0 | 41.5 kN |
| Fatigue load limit | Pu | 1.29 kN |
| Mass | ≈m | 0.62 kg |
| Sealing | Seal on both sides | |
| Bearing material | Hybrid (ceramic balls) | |
| Lubricant | Grease |
Dimensions4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | 55.0 mm | |
| Outside diameter | 80.0 mm | |
| Width | 52.0 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 dimensions8 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Diameter of shaft abutment | d a | min. 59.6 mm |
| Diameter of shaft abutment | d a | max. 62.2 mm |
| Diameter of shaft abutment | d b | min. 57 mm |
| Diameter of shaft abutment | d b | max. 60.1 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 |
Engineering — Calculation data9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Basic dynamic load rating | C | 40.3 kN |
| Basic static load rating | C 0 | 41.5 kN |
| Fatigue load limit | P u | 1.29 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 () x speed reduction factor (see table below) | |
| Contact angle | α | 18 ° |
| Ball diameter | D w | 7.938 mm |
| Number of rows | i | 4 |
| Number of balls (per bearing) | z | 21 |
Engineering — Calculation data — Correction factors for preload calculation4 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, preload class A | f 2A | 1 |
| Correction factor for hybrid bearings | f HC | 1 |
Engineering — Calculation data — Preload and stiffness (back-to-back, face-to-face)2 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Preload class | A | |
| Preload and stiffness | Preload and stiffness depend on final arrangement. Contact SKF |
Engineering — Dimensions9 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 55 mm |
| Outside diameter | D | 80 mm |
| Width | B | 52 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 |
| Recess diameter of outer ring (large side face) | D 2 | 74.7 mm |
| Recess diameter outer ring shoulder (small side face) | D 4 | 76.15 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) | Yes, back-to-back (<>), face-to-face (> >) |
Logistics3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Product net weight | 0.62 kg | |
| eClass code | 23-05-08-03 | |
| UNSPSC code | 31171531 |
Performance3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Basic dynamic load rating | 40.3 kN | |
| Basic static load rating | 41.5 kN | |
| Note | Refer to catalogue data or contact SKF for the attainable speeds |
Properties15 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Contact type | Normal contact (two-point contact) | |
| Number of rows | 4 | |
| Ring type | One-piece inner and outer rings | |
| Design | High-speed E | |
| Universal matching bearing | Yes, back-to-back (<>), face-to-face (> >) | |
| Matched arrangement | Universal matching | |
| Number of bearings in matched set | 4 | |
| Matched condition (axial clearance/ preload) | Extra light preload | |
| Tolerance class | P4A | |
| Material, bearing | Hybrid (ceramic balls) | |
| Coating | Without | |
| Sealing | Seal on both sides | |
| Sealing type | Non-contact | |
| Lubricant | Grease | |
| Indicative carbon footprint for new product | 2.3 kg CO 2 e |
