Rollers needle rollers are parts that can be supplied separately or included in more complex products, such as roller bearings. They are cylindrical products with a significant length to diameter ratio. They are most often used in bearings that have dimensional constraints in the radial direction.
Version A has a spherical end shape, version B has a flat end shape. Rollers A have a rounded profile at the ends, which helps to reduce stresses causing damage to parts. Typical sizes and tolerances of these products are fixed in GOST 6870. The products are available in several degrees of accuracy.
Needle rollers are supplied in boxes containing one size, made with one specific degree of tolerance..
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