SKF spherical roller bearings can deal with heavy radial and axial loads, misalignment, and shaft deflections.
The assortment of SKF spherical roller bearings is the widest available on the market. The standard assortment includes:
SKF spherical roller bearings are SKF Explorer bearings, which means more uptime, lower operating and maintenance costs, and more profit for your business. Almost all bearings are available with the option of a tapered bore. Depending on the bearing series, the tapered bore has:
- a taper 1:12 (designation suffix K)
- a taper 1:30 (designation suffix K30)
CC, CA, E design SKF spherical roller bearings
CC design SKF spherical roller bearings have two stamped window-type steel cages, an inner ring without flanges and a floating guide ring centred on the inner ring. CC design bearings are indicated by the designation suffix CC, or ECC for larger bearings.
CA design SKF spherical roller bearings have a machined double prong-type brass cage, an inner ring with a retaining flange on both sides and a floating guide ring centred on the inner ring. The flanges on the inner ring are designed to keep the rollers in place when swivelling the bearing during mounting or maintenance and are not designed to guide the rollers or accommodate any axial load. CA design bearings are indicated by the designation suffix CA, or ECA.
E design SKF spherical roller bearings have two stamped window-type steel cages, an inner ring without flanges and a floating guide ring centred on the inner ring (d ≤ 65 mm) or on the cages (d > 65 mm). E design bearings are indicated by the designation suffix E.
Annular groove and lubrication holes
- CC and CA design bearings are available with an annular groove and three lubrication holes in the outer ring (designation suffix W33) or three lubrication holes in the outer ring (designation suffix W20)
- E design bearings have an annular groove and three lubrication holes as standard. This feature is not identified in the bearing designation (no designation suffix).
Application specific bearings
SKF spherical roller bearings for vibratory applications are available in the 223 series, and are available with a cylindrical or tapered bore. Bearings for vibratory applications have C4 radial internal clearance as standard.
SKF spherical roller bearings for vibratory applications are manufactured to one of the following designs:
- E/VA405 bearings have two surface-hardened stamped window-type steel cages, an inner ring without flanges and a guide ring centred on the inner ring or on the cages.
- EJA/VA405 and CCJA/W33VA405 bearings have two surface-hardened stamped window-type steel cages, an inner ring without flanges and a guide ring centred on the outer ring raceway.
SKF spherical roller bearings for wind energy applications are available in the 240 series, from d ≥ 530 mm, and are designed explicitly for wind turbine main shafts. SKF spherical roller bearings for wind energy applications are indicated by the designation suffix BC.
SKF spherical roller bearings for high-speed applications have 50% higher limiting speeds than standard bearings, and are available in the 223, 232, 240 and 241 series in a special execution. These type of SKF bearings are indicated by the designation suffix VA991.
SKF spherical roller bearing specifications
The boundary dimensions are in ISO 15, except for the width of sealed bearings with a BS2- designation prefix.
Tolerances
Normal. Except for:
- SKF spherical roller bearings with d ≤ 300 mm:
- width tolerance at least 50% tighter than ISO standard
- P5 run-out
- SKF spherical roller bearings for vibratory applications:
- width tolerance at least 50% tighter than ISO standard
- P5 bore diameter
- P6 outside diameter
- Bearings for continuous caster applications: Normal
For more information, please refer to Tolerances, and bearing tolerance chart for actual tolerance values.
Internal clearance
Normal, C3. For more information, please refer to Internal clearance, and Radial internal clearance table of spherical roller bearings.
- Bearings for vibratory applications: C4
- Bearings for high-speed applications: C4
- Bearings for continuous casters: C3, C4
SKF spherical roller bearing designation system
SKF spherical roller bearings follow a system that may consist of a basic designation with or without one or more prefixes and/or suffixes. Please refer to SKF bearings designation system for basic designation
Prefixes
| Prefixes | Description |
|---|---|
| BS2-.. | Bearing, designated by a drawing number |
| ZE | Bearing with SensorMount feature |
Suffixes
| Suffixes | Description | |
|---|---|---|
| BC | Bearing for wind turbine main shafts with roller-guided cast iron cage (unless one of the cage design suffixes is specified) | Internal design |
| CA, CAC | Retaining flanges on the inner ring, guide ring centred on the inner ring, machined brass cage (unless one of the cage design suffixes is specified) | |
| CC(J), CJ | Flangeless inner ring, guide ring centred on the inner ring, two stamped steel cages | |
| CCJA | Flangeless inner ring, guide ring centred on the outer ring raceway, two stamped steel cages | |
| E | Optimized internal design for increased load carrying capacity 213, 222 and 223 series: Flangeless inner ring and two stamped steel cages. Annular groove and three lubrication holes in the outer ring. | |
| -CS, -2CS | Contact seal, NBR, on one or both sides | External design (seals, snap ring groove etc.) |
| -CS2, -2CS2 | Contact seal, FKM, on one or both sides | |
| -CS5, -2CS5 | Contact seal, HNBR, on one or both sides | |
| -CS6, -2CS6 | Contact seal, G-ECOPUR, on one or both sides | |
| -RS, -2RS | Contact seal, NBR, on one or both sides | |
| -RS5, -2RS5 | Contact seal, HNBR, on one or both sides | |
| K | Tapered bore, taper 1:12 | |
| K30 | Tapered bore, taper 1:30 | |
| F | Machined steel cage, inner ring centred | Cage design |
| FA | Machined steel cage, outer ring centred | |
| J | Stamped steel cage, inner ring centred | |
| JA | Stamped steel cage, outer ring centred | |
| MA | Machined brass cage, outer ring centred | |
| 235220 | Case-hardened inner ring with a helical groove in the bore | Materials, heat treatment |
| HA3 | Case-hardened inner ring | |
| C08 | Geometrical tolerances (tolerances of run-out and orientation) to class P5 | Accuracy, clearance, preload, quiet running |
| C083 | C08 + C3 | |
| C084 | C08 + C4 | |
| C2 | Radial internal clearance smaller than Normal | |
| C3 | Radial internal clearance greater than Normal | |
| C3H | Radial internal clearance in the upper half of the C3 range | |
| C4 | Radial internal clearance greater than C3 | |
| C4L | Radial internal clearance in the lower half of the C4 range | |
| C5 | Radial internal clearance greater than C4 | |
| P5 | Dimensional and geometrical tolerances (tolerances of run-out and orientation) to class P5 | |
| P6 | Dimensional and geometrical tolerances (tolerances of run-out) to class P6 | |
| P62 | P6 + C2 | |
| GEA8 | Filled to 60 – 80% with SKF LGEV 2 grease | Lubrication |
| GEM9 | Filled to 70 – 100% with SKF LGHB 2 grease | |
| GFP9 | Filled to 70 – 100% with SKF LGFQ 2 grease | |
| GLE | Filled to 25 – 45% with SKF LGWM 2 grease | |
| VT143 | Filled to 25 – 45% with SKF LGEP 2 grease | |
| VT143B | Filled to 45 – 60% with SKF LGEP 2 grease | |
| VT143C | Filled to 70 – 100% with SKF LGEP 2 grease | |
| W64 | Solid Oil | |
| W | Without annular groove and lubrication holes in the outer ring | |
| W4 | Eccentricity high point location marked on the inner ring | |
| W20 | Three lubrication holes in the outer ring | |
| W26 | Six lubrication holes in the inner ring | |
| W31 | Special inspection, recording and marking | |
| W33 | Annular groove and three lubrication holes in the outer ring | |
| W33X | Annular groove and six lubrication holes in the outer ring | |
| W77 | Plugged W33 lubrication holes | |
| W506 | W31 + W33 | |
| W507 | W4 + W31 + W33 | |
| W509 | W26 + W31 + W33 | |
| W513 | W26 + W33 | |
| W525 | W31 + W77 | |
| R505 | Bearing for railway axleboxes | Other variants |
| VA405 | Bearing for vibratory applications, surface-hardened stamped steel cages | |
| VA406 | Same as VA405, but PTFE coated cylindrical inner ring bore | |
| VA944 | Bearing for food and beverage applications | |
| VA991 | Bearing for high-speed applications | |
| VA9B1 | Bearing for continuous caster applications | |
| VE552(E) | Outer ring with three equally-spaced threaded holes in one side face to accommodate lifting tackle. The E indicates that appropriate eye bolts are supplied with the bearing. | |
| VE553(E) | Same as VE552(E), but threaded holes in both side faces | |
| VG114 | Surface-hardened stamped steel cages | |
| VG127 | Two separate cages | |
| VQ424 | Geometrical tolerances (tolerances of run-out and orientation) tighter than C08 | |