June 2010Issue No.16
Rack & Pinion Banner
Maximum precision, dynamics and durability plus optimal efficiency

Rack & Pinion Systems

The fact that WITTENSTEIN drive systems make sparing use of resources is nothing new - Long before "resource conservation" was a hot topic we were making the most efficient mechanical products on the market. To this day, energy efficiency is our number one priority for all WITTENSTEIN products.

 

The ideal drive system for any application

Thanks to WITTENSTEIN's vast sizing expertise, backed up by a similarly extensive portfolio of gearheads, racks and pinions, individual users are sure to find the ideal system for their particular application.

 

Typical applications

Regardless of whether the aim is to speed up the 25 ton gantry of a machine tool, position a laser cutting head at 400 m/min or execute welding operations with a tolerance of just 0.1 mm using a jointed-arm robot, WITTENSTEIN's rack & pinion drives guarantee maximum precision, dynamics and running time plus optimal efficiency. Owing to their operating principle, there is no restriction on the length of these drives, which is why they are perfect for applications with long travel distances. The fact that the racks can be sorted assures consistently high precision irrespective of the track length.

In view of the wide range of rack classes, gearhead types and pinion connections, it is possible to configure the ideal system for almost any application.

 

Leader in energy efficiency

Compared to linear drives, the traditional rival technology, rack & pinion drives provide clearly superior energy efficiency: whereas in practical duty ball screw drives and linear motors only rarely exceed the 90% efficiency mark, WITTENSTEIN's rack & pinion system achieves up to 97%. The resulting energy savings are considerable, especially in applications with high duty cycles.

  Rack & Pinion Video Clip  
Rack & Pinion Video 

See the alpha rack and pinion  with the TPM+ power servo actuator) in action! Click above.

  
Technical specifications of

rack & pinion drives

Max. travel speed: 440 m/min

Max. feed force: 47 kN with one drive

Max. precision: 5μm with direct measuring system

Max. input torque: 3654 Nm

 

Portfolio of rack & pinion drives

Racks with module 2 to 6

Lengths up to 2000 mm

Total pitch deviation up to 12μm/m

Servo planetary and worm gearheads

Right-angle and coaxial gearheads

Torsional backlash < 1 arcminute

Innovative pinion connection for very high rigidity

 

New 2m Rack option

Wittenstein 's product portfolio now includes racks with lengths up to 2m. Designed for applications with long travel lengths in mind, these racks provide significant efficiency improvements in assembly.

 

These racks are a supplement to our current Value Class offering available in modules 2, 3, 4, 5 and 6μm.

logo WITTENSTEIN - Being one with the future

  WITTENSTEIN Ltd were formerly alpha gearheads Ltd