Robotic Cycloidal Gearbox - GCL SeriesGCL Cycloidal Gearbox

GAM’s GCL Series Robotic Cycloidal Gearboxes provide low backlash and high rigidity for horizontal and vertical robotic and motion control applications.


  • Backlash of ≤1 arcmin with lost motion of ≤1 arcmin
  • Withstands the frequent start-stop impact loads of industrial robots with impact resistance 5x nominal torque
  • Multi-tooth meshing for torsional rigidity
  • Flange output in 7 sizes with nominal output torque of 167 to 4410 Nm and ratios of 57:1 to 192.4:1
  • Flanged hollow output in 6 sizes (up to 138 mm through hole) with nominal output torque of 490 to 4900 Nm
  • Available as
    • Component with loose input shaft/pinion (GCLC-F, GCLC-H)
    • Gearbox with cover, integrated input, and motor mounting plate (GCL-F)
  • Drops in for many competitors’ products
  • Integrated motor adapter plate ready to mount your motor
  • Optional integrated pre-stage
Want to know more about backlash, lost motion and other gearbox accuracy terms? Download GAM Gearbox Accuracy Definitions (pdf)

download GCL Brochure download GCL Catalog

GAM GCL online catalog Download the Robotic Gearbox Application Datasheet GCL Installation Manual

GCL Cycloidal with Pre-Stage for Easy Integration

GCL with integrated Dyna Series Right Angle Pre-StageDo you need a cycloidal gearbox with additional reduction or a right angle input?

GAM provides a complete gearbox, including the integrated pre-stage, ready to mount into your application. A single produt with a single part number simplifies ordering.

Pre-Stage options include:

  • Right angle turn with additional speed reduction using hypoid gearing for a compact configuration
  • Right angle turn in low ratios from 5:1 down to 1:1
  • Inline configuration with additional speed reduction

As with all GAM gearboxes, the GCL with pre-stage comes with a motor adapter plate ready to mount your motor

Robot Application


The GCL is well suited to high-end industrial robotics and motion control applications with its ability to withstand start-stop impact loads five times nominal torque.

  • Robotics
  • Tool changers
  • Positioning
  • Turntables
  • Pick & Place

GCL Series Models


Flange Output (Components)

GCL-F Cycloidal Gearbox with input and cover


Hollow Flange Output (Components)

GCL-F Cycloidal Gearbox with input and cover


Flange Output with Cover & Integrated Input

GCL-F Cycloidal Gearbox with input and coverGCL-F with Motor Adapter