Rack and pinion planetary reducers

Paul Boughton

KRPX is the new version of REDEX ANDANTEX rack and pinion high-tech planetary reducers, offering cost effective, easy to implement and high performing solutions for moving column and gantry machine types.

Made of two high-tech planetary reducers, KRPX allows perfect mounting on both sides of the machine frame and enables true zero backlash when coupled with an electrical preload system.
The output pinions are machined to the same diameter as the shafts, allowing the best possible balance between transmissible torque and rigidity at the rack. In addition, output bearing consists of two preloaded and substantially oversized angular contact roller bearings.

This exclusive design offers exceptional compound stiffness which allows to dramatically decrease the radial bending (up to 60 per cent of the overalldistortion) and to increase the natural frequencies of the global racks and pinions drive systems.
Available in three standard universal sizes (2, 3 and 4) KRPX is very compact, a definitive advantage for helping implementation with respective pinion height not higher than 104, 127 and 148 mm.
With this new concept, the machine-tools designer can easily expect to exceed market standards with maximum feed capacity up to 105 000 N and stiffness on the rack up to 333 000 N/mm.

For more information, visit www.redex-andantex.com

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