Rack & Pinion Systems

Basic (B) Servo Worm Reducers

Basic (B) Servo Worm Reducers

This standard range of Servo-Worm Reducers are perfect for use in applications that demand good performance, positioning and repeatability.  They were specifically developed for use with state-of-the-art servo motor technology, providing tight integration of the motor to the unit.  Angular backlash of less than 12 arc-minutes is provided standard.

They are available in two sizes (50 mm and 63 mm center distance) with input speeds up to 5,000 rpm, reduction ratios from 4.75 to 52:1 and output torque capacities up to 126 lb.ft.  A wide range of motor couplings and mounting flanges are available for assembly to virtually all servo motors, and the hollow bore output can be used to mount output shafts, pinion shafts, or other drive elements.

Typical applications for these reducers include precision rotary axis drives, traveling gantries & columns, material handling axis drives and electronic line shafting.  Industries served include Material Handling, Automation, Aerospace, Machine Tool and Robotics.

  • Unit Design &
    Construction
  • Unit Selection
  • Unit Ratings

Gearing: Internal gear design was optimized to provide an angular backlash of less than 12 arc-minutes.

Bearings: Input angular contact bearings for high input speed, and ball bearings for good radial and axial load capacity.

Housing:  Light weight aluminum housing for good heat dissipation, with integral input flange for servo motors and universal mounting on any face.

Output:  The output bore is available with a keyway or a compression-type hub (see dimension pages).  We offer a line of accessories to adapt this output to straight shafting, Rack & Pinions, or other gearing types.

These reducers are typically selected based on the peak cycle forces, which usually happen during accelerations and decelerations.  These cycle forces depend on the driven load, the speed vs. time profile for the cycle, and any other external forces acting on the axis.  For more selection information, please follow this PDF link.

For application & selection assistance, please call, fax or email us.  Your application information will be reviewed by our engineers, who will recommend the best solution for your application.

The following table gives the output torque ratings (in lb.ft.) for the Basic (B) Servo Worm Reducers at various input speeds and ratios.  Service factors need to be applied to these ratings to make a proper selection.

To see the unit dimensions of each size, click the "Unit Size" in the left column.

Unit Size
(C.D.**)
Gear Ratio Peak Torque
(lb.ft.)*
Output Torque (lb.ft.) based on Input Speed*
500 rpm 1,000 rpm 1,500 rpm 3,000 rpm 4,000 rpm 5,000 rpm
3
(50 mm)
4.75 365 40 46 46 46 43 41
6.75 266 36 42 46 46 43 41
9.25 180 31 36 39 46 46 43
14.50 234 37 43 46 50 50 50
19.50 162 29 33 37 43 43 43
29.00 198 32 37 40 46 46 43
39.00 135 35 40 43 50 50 50
50.00 99 28 31 33 40 40 40
4 (63 mm) 4.75 666 106 120 113 96 90
6.75 495 106 120 113 96 90
9.25 333 77 86 90 90 90
14.50 396 103 120 120 113 106
19.50 333 77 86 90 110 103
29.00 432 116 136 146 130 123
39.00 297 90 106 116 126 126
52.00 198 63 77 83 100 106

*Ratings are based on servo operation and 12,000 hours running at rated torque.  For continuous operation, please consult the factory.  Peak torque values are based on the ultimate strength of the gearing.  Information is subject to change without notice.
**C.D. = Center Distance of reducer, which is the vertical distance from the input shaft to the output shaft.