Ultra 90 Degree Gearbox


With an efficient right-angle configuration, the Ultra 90 Degree Gearbox offers a robust solution to building a more compact robot. The Ultra 90 Degree Gearbox allows you to connect the UltraPlanetary Gearbox and the HD Hex Motor (REV-41-1600) in a 90-degree orientation for maximum flexibility and ease of use in tight spaces. This versatile gearbox can also be used to transfer power between two 5mm hex shafts that are at a right-angle configuration.


  • Mounts to the output of the UltraPlanetary Gearbox
  • Mounting holes compatible with the REV Motion Pattern
  • Affix between pieces of channel in a channel drivetrain for a more compact design
  • Through-bore hex on the output allows positioning the gearbox in the middle of a shaft or using a very long shaft without needing to cut it
  • Blind socket hex input allows shafts of varying length and also captures the shaft when mounted to the output of an UltraPlanetary Gearbox
  • Ball bearings located on the input and output for smooth performance


  • Case Material: Glass Fiber Reinforced PA66 Nylon

  • Gear Material: Sintered Steel
  • Gear Ratio: 1:1
  • Weight (just gearbox): 102.6g (0.226lbs)
  • Weight (with UP mounting accessories): 117.2g (0.258lbs)
  • Input & Output Bore: 5mm Hex
  • Input Bore Depth: 10.5mm
  • Output Bore Depth: through-bore
  • Mounting Holes: M3 threaded (M3 clearance on input for mounting to UP)
  • Mounting Hole Depth: With standard REV channel or brackets, the recommended screw length for mounting the Ultra 90 Degree Gearbox to REV motor brackets or channel is M3 x 6mm (REV-41-1713). REV recommends that no more than 4mm of thread engagement is used to mount the gearbox on the motion pattern faces. 
  • Bolt Pattern: 32mm bolt circle (60° spacing)
  • Height: 33mm
  • Width (output-to-output): 40mm
  • Length (from input face): 40mm

Kit Contents

  REV-41-2080   Ultra 90 Degree Gearbox   QTY 1 
  REV-41-2081   5mm Hex Shaft, 20mm  QTY 2 
  REV-41-2082   UltraPlanetary Face Mount Spacer   QTY 1 
    M3 x 40mm Socket Head Cap Screw   QTY 4 


CAD & Drawings