Description Area of application: For compensating higher tolerances with connected structures The same high load ratings in all four main directions of loading Low noise level and outstanding travel behavior Limitless interchangeability as all Ball Rail Systems can be combined at will with all Ball Runner Block versions within each accuracy class. Smooth operation due to optimal return and ball pick-up and entry design Features Compensates own misalignments (for deviations up to 10' in 2 levels) Extra-compact design Enables greater parallelism and height offsets of mounting bases Accuracy classes H and N Preload classes: C0 (without preload, clearance) and C1 (moderate preload) Minimum quantity lubrication with integrated reservoir for oil lubrication Lube fittings with metal threads on all sides Excellent dynamic characteristics Can be used on all SNS Ball Guide Rails Product description Product description of Ball Rail Systems Production description – Ball Runner Block Materials Selection of a linear guide acc. to DIN 637 Ball chain and seals Design and version Friction Due to the Rexroth design with four rows of balls, 2-point contact is available in all loading directions. This reduces the friction to a minimum. Other ball rail systems with two or four rows of balls with 4-point contact have multiple friction: due to the differential slip with lateral loading and in case of comparable prestressing without the load, the gothic raceway profile causes higher friction (depending on the raceway curvature and the load, up to five times the friction coefficient). This high friction leads correspondingly to greater heat. Seals Seals are use to prevent dirt, chips and coolants, etc. from working their way into the inside of he Ball Runner Block, thereby preventing reductions to its service life. For further information, see "Selection criteria/seals". Standard seal (SS) Universal seals are fitted as standard in Rexroth Ball Runner Blocks. They have a uniform sealing effect for Ball Guide Rails with and without cover strips. Low friction and a good sealing effect have both been taken into account in the design. For applications where effective sealing is required. Low-friction seal (LS) For special requirements with regard to ease of movement. Double-lip seal (DS) For increased exposure to media Front seal For applications in environments with fine dirt or metal particles, as well as coolants or cutting fluids. Interchangeable during servicing. Front seals are available as accessories for mounting by the customer. FKM seal For applications in extreme environments with fine dirt or metal particles, as well as heavy use of coolants or cutting fluids. Interchangeable during servicing. FKM front seals are available as accessories for mounting by the customer. Cover plate wiper For use in environments with coarse dirt or chips. Cover plate wiper are available as accessories for mounting by the customer. Internal ball loads at angle alignment errors α a) Int
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