SERVICE: Recommended for suspension of cold pipe lines or hot lines where little or no insulation is required. 50: Light Two Bolt Pipe ClampįINISH: Black or galvanized furnished black unless otherwise specified.
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If the fit is too loose, the bearings slide around on the shaft, eliminating the advantages gained by selecting a ball bearing in the first place. Within the assembled mechanism, the fit of the ball bearing on its mating components is vital to maximizing bearing life. Finally, many miniature bearings are used in pulling and stressing man-made vacuums and the natural vacuum of space. Flow meter bearings travel at slower speeds but face a unique set of pressure, corrosion, and environmental challenges. For example, some high-speed instrument bearings travel at speeds approaching 500,000 rpm. Aircraft, medical instruments, computers, flow meters, and pick-and-place robots are just some of the challenging applications they are found in. Miniature and instrument ball bearings are used in high-precision applications to mate parts, control movement, and provide rotational and oscillating functionality.
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One of the rings in the bearing assembly must be free to move to prevent axial pre-loading. Axial play is proportional to the radial play in the bearing. Higher contact angle is desirable for axial load applications. A low contact angle is desirable for pure radial loads. A higher assembled radial play means a higher contact angle. The contact angle of a radial bearing under axial load is related to the radial play remaining in the bearing after installation. An interference fit causes a 50-80% loss in radial play. Interference fits may be necessary to prevent one bearing ring from turning relative to its mating part under heavy loads or when cycle vibration is present. to Line to slightly loose shaft and housing fits are desirable for most applications. ** For closer running accuracy or reduced axial play K25 internal clearance may be used provided that the fit of the outer ring in the housing is line to line or looser.Ĭonsult our Engineering Department for unique applications. * For closer running accuracy or reduced axial play K13 internal clearance may be used provided that the fit of the outer ring is line to line or looser One of our SR1878 bearings, mounted in a Zero-Resistance throttle tube Light Load In other conditions, modification in fits and internal clearance may be required. The following tables are a guide for establishing shaft and bearing fits for miniature and instrument bearings, when the expansion coefficients of the shaft and housing are similar or when the operating temperature differential between them is nominal.