Description Area of application: For restricted space in the longitudinal direction Significantly reduced frictional oscillations and low friction level, particularly under external load Attachments on the Ball Runner Block can be mounted from above and below Maximum precision Patented entry zone increases the travel accuracy up to a factor of six Features Long-term lubrication is possible over several years Lube fittings with metal threads on all sides End-face fastening thread for all attachments Integrated all-around sealing High torque capacity Different preload classes High rigidity in all load directions – permits applications with just one runner block per rail The same high load ratings in all four main directions of loading Maximum system rigidity due to pre-tensioned O-arrangement Optional integrated, inductive and wear-free measuring system Excellent dynamic characteristics Can be used on all SNS/SNO 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 cust
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