Description Rexroth connection dimensions With seals Preload class: C1, C2, C3 Tolerance grade: T3 (for sizes as per the product overview for screws, see General Technical Notes and Information "Product description"), T5, T7 Product description Driven flanged single nut FAR-B-S The assembly consists of: nut, angular-contact thrust ball bearing, and slotted nut NMZ Fundamental advantages of systems with driven nuts Moment of inertia In the case of long screws, the screw does not have to be rotated in the acceleration phase, only the nut. The mass moment of inertia of the screw is not therefore critical. The moment of inertia of the nut is comparatively low and it is no longer dependent on the required stroke. Dynamics The intricate end bearing designs required for high dynamics, for example, fixed bearing on both ends with angular-contact ball bearings, are no longer necessary. Screw extenders Since the screw is stationary, relatively little effort is needed to stretch the screw: Increase in permissible axial loading (buckling load); not limited by end bearings Compensation of temperature influences Increase in overall rigidity Design and manufacturing tolerances The use of nuts with a high level of axial and radial runout precision minimizes the induced screw vibration. All functional components are supplied from a single source. In-house designs are no longer needed. Liquid cooling Improved cooling can easily be provided using a hollow-bored screw: the stationary screw can be cooled with comparatively little effort. Controlled cooling virtually eliminates changes in length due to temperature fluctuations. 1) Driven nut FAR 2) Ball screw assemblies BSA screw Product overview Technical data Technical data for nuts Size C C0 Mass JFAR MRb nmax d0 x P x Dw - i N N kg kg·m² Nm rpm 32 x 10R x 3,969 - 5 38000 1) 58300 1) 2) 5.8 0225 1 3000 3) 32 x 20R x 3,969 - 3 23600 1) 33700 1) 2) 5.9 0229 32 x 32R x 3,969 - 3 23400 1) 34000 1) 2) 6.3 0251 40 x 10R x 6 - 5 73400 1) 109300 1) 2) 7.3 0427 1.2 2800 3) 40 x 20R x 6 - 3 45500 1) 62800 1) 2) 7.5 0439 40 x 40R x 6 - 3 44400 1) 62300 1) 2) 8.4 0507 50 x 10R x 6 - 6 95600 1) 166500 1) 2) 8.3 0676 1.4 2700 3) 50 x 20R x 6,5 - 5 90800 1) 149700 1) 2) 9.1 076 50 x 40R x 6,5 - 3 55800 1) 85900 1) 2) 9.5 0798 63 x 10R x 6 - 6 106600 1) 214300 1) 2) 12.8 0.0139 2.3 2300 3) 63 x 20R x 6,5 - 5 100700 1) 190300 1) 2) 13.5 0.01564 63 x 40R x 6,5 - 3 64100 1) 114100 1) 2) 13.9 0.01616 1) Load ratings calculated according to DIN ISO 3408-5 2) The load ratings are valid for tolerance grades T3 and T5 only. For other tolerance grades, please take into account the correction factor fac (see General Technical Notes and Information "Technical Data", Technical Notes). 3) Limited by the max. speed of the bearing. Bearing pretensioned without external operating load. Duty cycle 25%; max. steady-state temp. +50°C Operating conditions Size Admissible operating temperature (min ... max) 1) Admissible storage temperature (min ... m
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