SKF 6308-2Z Radial Bearing

The SKF single-row, double-shielded non-contact radial bearing has symmetric races to support radial loads while maintaining high speeds and rotational accuracy. It conforms to the precision standard Annular Bearing Engineers Committee (ABEC) 1 for performance within a narrow range of variation, and its deep grooves make it capable of supporting heavier loads than standard grooves and keeping balls stable for high speeds. It has a CN (normal) radial internal clearance for applications that do not involve thermal expansion, and its steel cage evenly spaces the rollers for even load distribution and prevents contact to reduce friction, vibrations, and noise. It is shielded on both sides of the bearing to protect against contaminants. This radial ball bearing is suitable for use in general purpose applications that primarily involve radial loads and minimal axial loads at relatively high rotational speeds. These include transmissions, motors, and pumps, among others.

Specifications

• Main bearing dimensions ISO 104:2002
• Basic dynamic load ratings DIN ISO 281
• Dimensional and geometric tolerances ISO 199:1997, tolerance class PN
• Through-hardening steel for inner and outer rings and rollers ISO 683-17
• Pressed sheet steel for cage (DIN) EN 10111:1998
• Load carrying capacity and life ISO 281:1990
• System for creating part numbers for rolling bearings DIN 623-1
• Bore Diameter 40 millimeters
• Inside Diameter 40 millimeters
• Item Diameter 90 millimeters
• Outside Diameter 90 millimeters
• Width 23 millimeters

Rolling bearings use rolling elements to maintain the separation between moving parts to reduce rotational friction and support radial and axial loads. These elements can be one of the following types: ball, cylindrical, spherical, barrel, needle, spindle, or tapered. All rolling bearings are open, shielded, or sealed. Sealed bearings are lubricated with oil or grease in the bearing factory, while open and shielded bearings are meant to be lubricated in place, with periodic reapplication of lubrication, based on use. The shield protects the working parts of the bearing from environmental debris that may be introduced and could reduce the ball bearing speed and lifespan. Rolling bearings are used in a range of applications from agricultural machinery to conveying equipment, robotics, dental equipment, elevators, rolling mills, ship rudder shafts, and aggregate crushers, among others.

SKF Group manufactures bearings and units, seals, mechatronics, and lubrication systems that meet International Organization for Standardization (ISO) 14001 and 9001, and Occupational Health and Safety Assessment Series (OHSAS) 18001 standards for quality assurance. The company, founded in 1907, is headquartered in Göteborg, Sweden.