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roller bearing |
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roller bearingOne of the two types of rolling, or antifriction, bearings, the other being the ball bearing. Like a ball bearing, a roller bearing has two grooved tracks, but the balls are replaced by rollers. The rollers may be cylinders or shortened cones. If the rollers are cylindrical, only radial loads (perpendicular to the axis of rotation) can be carried, but with conical rollers both radial and thrust, or axial, loads (parallel to the axis of rotation) can be carried. In a given space, a roller bearing can carry a greater radial load than a ball bearing can. roller bearing [′rō·lər ‚ber·iŋ] (mechanical engineering) A shaft bearing characterized by parallel or tapered steel rollers confined between outer and inner rings. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Heavy-duty spherical roller bearings are mounted in cast steel pillow block housing for improved shock loading Ball bearings are often used in wheel applications because they are cheap and get the job done, but tapered roller bearings have long been the gold standard (both in the senses of price and quality). At present, two methods are used to move the head: moving along ceramic rails on roller bearings, and moving it on flexures. |
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