Technical data
Product specifications
Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.
Core specifications13 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Variant / construction | Super-precision cylindrical roller bearings | |
| Bore diameter | d | 240 mm |
| Outside diameter | D | 320 mm |
| Width | B | 80 mm |
| Basic dynamic load rating | C | 528 kN |
| Basic static load rating | C0 | 1220 kN |
| Fatigue load limit | Pu | 118 kN |
| Mass | ≈m | 18.3 kg |
| Internal clearance | C1 | |
| Sealing | Without | |
| Cage | Machined metal | |
| Bearing material | Bearing steel | |
| Lubricant | None |
Dimensions3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | 240.0 mm | |
| Outside diameter | 320.0 mm | |
| Width | 80.0 mm |
Product identity5 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Official product category | Super-precision cylindrical roller bearings | |
| Official taxonomy path | /products/super-precision-bearings/cylindrical-roller-bearings | |
| Structure group ID | BC2_010 | |
| Available from SKF | Yes | |
| Remanufacturable | No |
Engineering — Abutment dimensions6 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Abutment diameter shaft | d a | min. 251 mm |
| Abutment diameter shaft (NNU design) | d a | max. 262 mm |
| Abutment diameter shaft (NNU design; not for tapered bore) | d b | min. 269 mm |
| Abutment diameter housing | D a | max. 309 mm |
| Fillet radius | r a | max. 2 mm |
| Oil nozzle position (not for variants with TNHA cage) | d n | 267 mm |
Engineering — Calculation data7 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Basic dynamic load rating | C | 528 kN |
| Basic static load rating | C 0 | 1220 kN |
| Fatigue load limit | P u | 118 kN |
| Attainable speed for grease lubrication | 2200 r/min | |
| Attainable speed for oil-air lubrication | 2600 r/min | |
| Reference grease quantity | G ref | 171 cm³ |
| Static radial stiffness (guideline value) | 6340 N/µm |
Engineering — Dimensions10 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bore diameter | d | 240 mm |
| Outside diameter | D | 320 mm |
| Width | B | 80 mm |
| Shoulder diameter outer ring (NNU design) | D 1 | 292.2 mm |
| Raceway diameter inner ring (NNU design) | F | 265 mm |
| Width annular lubrication groove at outer ring | b | 11.1 mm |
| Diameter lubrication hole (outer ring) | K | 3 mm |
| Chamfer dimension outer ring | r 1,2 | min. 2.1 mm |
| Chamfer dimension inner ring (bearing with tapered bore) | r 3,4 | min. 2.1 mm |
| Permissible axial displacement from the normal position of one bearing ring relative to the other (all) | s | max. 3.7 mm |
Engineering — Engineering specifications1 parameter
| Parameter | Symbol | Value |
|---|---|---|
| Bore type | Cylindrical |
Logistics3 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Product net weight | 18.3 kg | |
| eClass code | 23-05-09-01 | |
| UNSPSC code | 31171505 |
Performance4 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Basic dynamic load rating | 528.0 kN | |
| Basic static load rating | 1220.0 kN | |
| Attainable speed for grease lubrication | 2200.0 r/min | |
| Attainable speed for oil-air lubrication | 2600.0 r/min |
Properties16 parameters
| Parameter | Symbol | Value |
|---|---|---|
| Bearing part | Complete bearing | |
| Number of rows | 2 | |
| Bore type | Cylindrical | |
| Cage | Machined metal | |
| Design | NNU | |
| Number of flanges, outer ring | 3 | |
| Number of flanges, inner ring | 0 | |
| Loose flange | None | |
| Radial internal clearance | C1 | |
| Tolerance class | Class SP (SP) | |
| Material, bearing | Bearing steel | |
| Coating | Without | |
| Sealing | Without | |
| Lubricant | None | |
| Relubrication feature | Annular groove and lubrication holes | |
| Indicative carbon footprint for new product | 67.9 kg CO 2 e |
