Description Area of application: For lightweight design – for compensating low tolerances with connected structures Optimized entry-zone geometry and high number of balls minimize variation in elastic deflection Extra-compact lightweight design 60 % less weight due to aluminum compared to steel Ball Runner Blocks Maximum precision Patented entry zone increases the travel accuracy up to a factor of six Features Can be used on all SNS Ball Guide Rails Lube port with metal thread on all sides Ball Runner Block pre-lubricated at the factory. Attachments on the Ball Runner Block can be mounted from above Limitless interchangeability as all Ball Rail Systems can be combined at will with all Ball Runner Block versions within each accuracy class. Excellent dynamic characteristics Minimum quantity lubrication with integrated reservoir for oil lubrication Predrilled holes on the Ball Runner Block for pinned fitting Enables greater parallelism and height offsets of mounting bases Quiet, smooth running thanks to optimally designed ball and ball chain return and guidance Accuracy classes H and N are combinable with all rails in each accuracy class Long-term lubrication is possible over several years Ball chain for low noise level and best travel behavior 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 o
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