Precautions for Use
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• When assembling oil seals, apply grease following procedures below in order to prevent dry friction for initial stage of operations. a. Single lip type oil seal Apply to entire periphery on the opposite side of lip's seal end uniformly with finger to the extent that it does not build up. b. Double lip type oil seal Apply to 40 to 60 % of the entire periphery of lip's space with finger. • Make sure that there is neither dust, flaw, nor rust on the contact surface (shaft area) of the oil seal and apply grease or oil for smooth installation. • For checking a flaw on the lip surface, lightly sweep with a wire. If it catches, replace the oil seal.
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• Install using a guide and jig as shown below to avoid damaging the oil seal lip.
CO US N F E ID O E F N TS TI M AL GL : F O OR BA T L H
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• After the oil seal is pressed in, there should be no inclination. Inclination allowance: ≦ 0.2 mm / dia. 100 mm. • When applying adhesive to the oil seal periphery, take care that it does not adhere to the lip surface. Use clean guides and jigs since adhesive on the jig could easily be transferred to the lip. [4] Handling bearings Due to the extremely high precision of bearing, the following precautions should be observed. 1) Since dust adversely affects bearing wear, dust prevention measures should be carried out sufficiently during disassembly and reassembly. Do not unpack a bearing package until immediately before installation. 2) Avoid rough handling or shock on bearings. Do not allow a bearing to spin to the extent that it makes noise while cleaning with compressed air. Cautions during bearing installation 1) Do not hit on neither the inner nor outer ring during bearing installation which causes indentation on the rolling surfaces.
2) If interference is required on the inner ring, press in with a jig as shown in the figure. Bearing with large interference should be heat-treated. When using a heater, do not raise temperature to more than 120 ℃ because that would decrease heat-treated hardness. 3) Non-separating bearing which requires interference on both inner and outer rings should be pressed in with a jig as shown in the figure. [5] Handling snap ring • When installing or removing a snap ring, use a snap ring pliers with special attention not to widen excessively. • Make sure that it is completely fitted in the grooves after installation.
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MSM-17-04-001EN 17
