High Speed NAST25ZZ Roller Followers Bearing 25x52x20mm Separable Type with Side Plates Bearings NAST25UUR

BearingsBearingHigh precision, fast speed, long life, uniformly load distributed, can withstand high thrust loads.SEPARABLE ROLLER FOLLOWERSRoller Followers are bearings designed for outer ring rotation, in which needle rollers are incorporated in a thick walled outer ring. Roller Followers include separable and non-separable types. These bearings are available in a variety of types to suit almost any kind of application. They are widely used for cam mechanisms and for linear motions of conveying equipment.MOUNTING1 In case of shield and sealed types, match the side surface correctly to the mating seating surface indicated by the dimension a shown in the dimension table, and fix them. (See Fig. 1.)2 When mounting Roller Followers, pay special attention to avoid locating the oil hole of the inner ring within the loading zone. This may lead to a short bearing life. (See Fig. 2.)3 When mounting Sealed Type Separable Roller Followers, do not cause the side plates to come off. If they come off, set them again in place taking care to avoid damaging the seal lips.4 In case of Roller Followers without an inner ring, the shaft requires heat treatment and grinding finish. The recommended surface hardness of the shaft is 58-64HRC, and the recommended roughness of the shaft is 0.2 umRa or less. Also, the outer ring and cage are guided by side surfaces of the mounting parts. Therefore, it is recommended that the side surfaces of the mounting parts be finished by grinding or at least by machining. (See Fig. 3.)5 In Non-separable Roller Followers, the side plates are press-fitted. Therefore, when mounting the Roller Followers, do not push the side plates.

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