Description Area of application: For restricted upward and longitudinal space Maximum precision Significantly reduced frictional oscillations and low friction level, particularly under external load Ball Runner Block body or ball Guide Rail made of steel with corrosion-resistant coating, matt silver finish, hard chrome plated Patented entry zone increases the travel accuracy up to a factor of six Features Long-term lubrication is possible over several years Excellent dynamic characteristics End-face fastening thread for all attachments Low noise level and outstanding 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 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. Technical data Load capacities and load moments Size 20 25 C N 14500 28600 C0 N 24400 35900 Mt Nm 190 410 Mt0 Nm 310 510 ML Nm 100 290 ML0 Nm 165 360 The calculation of the dynamic load ratings and load moments is based on a stroke length of 100,000 m as per DIN ISO 14728-1. However, often only 5
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