Atlanta BG-Servo Bevel Gear Units

This standard range of Bevel-Gear Servo 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 6 arc-minutes is provided standard.

They are available in three sizes (50mm, 63mm and 80mm centre distance) with input speeds up to 5,000 rpm, reduction ratios from 4.75 to 9.25:1 and output torque capacities up to 450Nm. 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.

The following are typical features of our BG-Servo Gear Units:

  • Backlash: <6 arcmin
  • 3 sizes: centre distance 50, 63 and 80mm
  • 3 ratios: 4.75; 6.75 and 9.25:1
  • Output torque: from 100 to 450 Nm
  • Output hollow shaft:
  • key connection
  • clamp connection
  • generously dimensioned and supported for high additional forces
  • Very high rigidity
  • High precision

Gearing: Internal gear design was optimized to provide high efficiency and an angular backlash of less than 6 arc-minutes.

Bearings: Robust output tapered-roller bearings for high radial and axial load capacity.

Housing: Light weight aluminium 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.


Size Ratio i T2max. (Nm) Efficiency @ 1500rpm
50 mm 4.75 160 94%
6.75 160 92%
9.25 125 90%
63 mm 4.75 330 94%
6.75 330 92%
9.25 260 90%
80 mm 4.75 700 95%
6.75 680 93%
9.25 550 91%


50mm Center Distance

63mm Center Distance

80mm Center Distance


Calculation and Selection Document

Atlanta CAD Drawings


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