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Roller Bearing Outer Race

Roller Bearing Outer Race

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Description
This is an outer race for a roller bearing manufactured around 1950. Roller bearings can support very heavy radial loads (as well as light axial loads) due to their wider surface area, but must operate at a slower speed when compared to ball bearings. The Anti-Friction Bearing Manufacturers Association collected bearings for a public relations exhibit during the early 1950s, and donated them to the museum in 1977.
Simple bearings have been used for thousands of years reducing friction on turning parts like the axles of carts. In the late 1800s and early 1900s advances in machining and production expanded bearing use in all types of machines greatly increasing their life and precision. Bearings reduce friction on turning surfaces and keep them running true. Bearings come in a variety of shapes and sizes (including ball, roller, tapered, and simple friction). Modern bearings are often set in an inner and outer ring (called a race) sometimes with cages (separators) spacing the bearings. Changes to the size, shape, alignment, race, and cage allow for bearings to be used in almost any industry—from industrial turbines and automobiles to household mixers and computer hard drives.
Location
Currently not on view
Object Name
Bearing
Measurements
overall: 7/8 in x 2 in; x 2.2225 cm x 5.08 cm
ID Number
MC.336104.06
catalog number
336104.06
accession number
1977.0585
Credit Line
Anti-Friction Bearing Manufacturers Association
See more items in
Work and Industry: Mechanical and Civil Engineering
Industry & Manufacturing
Data Source
National Museum of American History
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