Description Area of application: For high torsional moments on rails with restricted lateral space The same high load ratings in all four main directions of loading Long-term lubrication is possible over several years Excellent dynamic characteristics High torque capacity Features Attachments on the Ball Runner Block can be mounted from above Integrated all-around sealing Improved rigidity under lift-off and side loading conditions due to two additional mounting screw holes at the center of the Ball Runner Block Can be used on all BNS Ball Guide Rails Wide range of accessories End-face fastening thread for all attachments Optimized entry-zone geometry and high number of balls minimize variation in elastic deflection Quiet, smooth running thanks to optimally designed ball and ball chain return and guidance Maximum system rigidity due to pre-tensioned O-arrangement Very high torsional moment load capacity and very high torsion resistance – therefore primarily used as an individual guide Ball chain for low noise level and best travel behavior Ball Runner Block pre-lubricated at the factory. 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 mou
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