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Angular Contact Bearings

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About Angular Contact Bearings

Angular contact bearings are designed such that a contact angle between the races and the balls is formed when the bearing is in use. The major design characteristic of this type of bearing is that one, or both of the ring races have one shoulder relieved, or higher than the other. In order for these bearings to function properly, they must be assembled with a thrust load. This loading (or preload) creates a line of contact (or contact angle) between the inner race, the ball and the outer race. The preload can be built into the bearing or created when the bearing is inserted into an assembly. The contact angle varies from 15° to 40° and is measured relative to a line running perpendicular to the bearing axis. Angular contact bearings are unidirectional thrust bearings that can withstand heavy thrust loads and moderate radial loads.

Important dimensions to consider when searching for angular contact bearings include design units, bore, outside diameters, and outer ring width.  Design units can be in either inches or metric units.  Some manufacturers may specify parts in both.  The bearing industry uses a standard number system for bearings with metric diameter bores.  For bore sizes 04 and up multiply by 5 to obtain the bore in millimeters.  If the bore is a hex enter the dimension across the flats.  If the bore is tapered enter the smaller diameter.  The outside diameter of the bearing includes the housing if a housed unit, but excludes the flange if a flanged bearing.

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Products & Services Related to Angular Contact Bearings

Ball Screw Support Bearings
Ball screw support bearings are designed for use in ball or lead screw applications.
Ceramic Bearings
Ceramic hybrid bearings, the most common type of ceramic bearing, are constructed of steel inner and outer rings with ceramic (typically Si3N4) balls in place of steel.  Common types of ceramic bearings are angular contact and conrad.
Cylindrical Roller Bearings
Cylindrical roller bearings have high radial-load capacity and moderate thrust loads. They contain rollers which are cylindrically-shaped, but crowned or end-relieved to reduce stress concentrations.
Slewing Rings and Turntable Bearings
Slewing rings and turntable bearings can accommodate axial, radial and moment loads. They are not mounted in a housing or on a shaft, but are instead mounted directly to a seating surface via mounting holes.
Spherical Roller Bearings
Spherical roller bearings are self-aligning, double row, combination radial and thrust bearings. They use a spherical or crowned roller as the rolling element.
Super Precision and Spindle Bearings
Super precision and spindle bearings are high-precision bearings that are designed for use in machine-tool spindles and other precision applications. Most super precision bearings and spindle bearings carry a high quality-rating such as ABEC-7 or ABEC-9, and run coolly and smoothly at high speeds.
Thrust Bearings
Thrust bearings are designed for pure thrust loads, and can handle little or no radial load. The rolling element in a thrust bearing can be a ball, needle or roller.

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Engineering Web: Angular Contact Bearings

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Part Numbers for Angular Contact Bearings

Part # Distributor Manufacturer Product Category Description
7309 BECBM Amazon SKF BISS SKF 7309 BECBM Single Row Angular Contact Ball Bearing With Machined Brass Cage
5212CZZ Amazon MRC BISS MRC 5212CZZ Double Row Sealed Angular Contact Ball Bearing
Kit8359 Amazon VXB BISS Angular Contact Bearing 35x52x20:Air Conditioner:Sealed
Kit6930 Amazon VXB BISS 5201ZZ Bearing 12x32x15.9 Angular Contact
Kit6939 Amazon VXB BISS 5205ZZ Bearing 25x52x20.6 Angular Contact

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