Description Area of application: For restricted space in transverse direction and high rigidity requirements Higher rigidity than SNS Maximum precision Significantly reduced frictional oscillations and low friction level, particularly under external load Steel Ball Runner Block body with corrosion-resistant coating, matt silver finish, hard chrome plated Features Patented entry zone increases the travel accuracy up to a factor of six Long-term lubrication is possible over several years Excellent dynamic characteristics End-face fastening thread for all attachments Ball Runner Block pre-lubricated at the factory. The same high load ratings in all four main directions of loading 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 15 25 30 35 45 C N 9860 28600 36500 51800 86400 C0 N 12700 35900 48100 80900 132000 Mt Nm 95 410 630 1110 2330 Mt0 Nm 120 510 830 1740 3560 ML Nm 68 290 440 720 1540 ML0 Nm 87 360 580 1130 2350 The
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