SD Rotation Drives w/Bearings

Perfection Gear

SD style swing drives provide a cost effective solution to rotational application requirements.

The SD swing drive incorporates a slewing ring bearing in the drive system housing, providing ease of assembly and minimizes interface surface machining. Pre-set backlash in these swing drives eliminates the adjustment error that occurs during assembly of other rotation drives and slew rings. The SD provides a cost effective solution to rotational application requirements.

Key Features

  • Rugged construction, able to withstand high shock loads and overturning moments that are common to crane usage
  • Motor can be mounted at either end



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Technical Overview

Size 5.30″ to 11.00″ Center Distance
(Worm to Slewing Ring)
Ratio 61:1 to 103:1
Output Torque
7,300 to 39,390 Capacity
Slewing Ring Bearing
(Outside Diameter)
9″ to 20″
Additional Sizes Per Customer Specification
Overturning Moment
10,000 to 90,000
Input Option SAE “A” Mount;
2 Bolt, Keyed or Splined
Or Per Customer Specification
Other Specifications Worm Gear Primary Gearbox
with Electric Motor Input