The rolling element of what type of bearing may, in some cases, be 10 times as long as its diameter?

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Needle bearings have a long, cylindrical rolling element with a small diameter, allowing for high load capacity in a compact design. In some cases, their length may be up to 10 times their diameter. Stretch bearings and axial bearings are not common bearing types, and spherical-roller bearings have spherical rolling elements.

The Rolling Element of What Type of Bearing May, in Some