This SKF 33 DNRCBM series double-row angular contact ball bearing is an open bearing, and has a two-piece inner ring, 40-degree contact angle, snap ring, brass cage, and P6 tolerance rating. It supports high thrust loads and radial loads, and occupies less axial space than a pair of single-row angular contact ball bearings mounted together. This bearing is nonseparable and has a two-piece inner ring that allows for the maximum number of balls in each raceway, providing a higher radial load capacity than a Conrad-type bearing of the same size. This bearing is specifically designed for applications involving centrifugal pumps but is suitable for other industrial and commercial applications. The 40-degree contact angle of the balls in relation to the raceways gives the bearing a greater capacity for supporting thrust loads over bearings with a lower contact angle. It has a snap ring groove with a snap ring in the outer ring for locating the bearing axially in the housing and an open design for lubricating the bearing in place. This bearing has a brass cage to prevent the balls from coming into contact with each other during use, reducing friction, vibration, and noise. The bearing has a dimensional and running accuracy to tolerance class P6 in accordance with International Organization for Standardization (ISO) 492:2002 for a higher level of precision than bearings manufactured to normal tolerances. ISO-rated ball bearings are manufactured to tight dimensional tolerances, making them useful in applications that require high accuracy, high rotational speeds, and increased operating efficiency. This angular contact ball bearing is primarily for using in compressor pump applications, but it is also for use in other industrial applications including automotive drives and gearboxes, among others.
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 manufactures bearings, seals, and lubrication systems for automotive, OEM, energy, and other and industrial applications. The company, founded in 1907, is headquartered in Gothenburg, Sweden, and meets International Organization for Standardization (ISO) TS 16949 and 9001 standards for quality assurance.