Harmonic Drive SHD-20 is a compact strain wave gear from the SHD series by Harmonic Drive LLC, size 20. It features a large hollow shaft through-bore that allows cable or pipe routing through the axis center -- particularly useful in robot joints. The three-component mechanism (wave generator, flexspline, circular spline) delivers near-zero backlash reduction.
Available gear ratios: 50:1, 80:1, 100:1, 120:1, 160:1. Peak output torque: 32 Nm (at ratio 100), continuous torque: 11 Nm. Angular backlash: <=1 arc-min (near zero). Weight approx. 0.27 kg. Operating temperature: -10 to +70 degrees C. Lubrication: long-life H1 grease or oil.
The SHD series is widely used in robot arm joints (cobots, industrial manipulators), EGC axes, medical positioning devices, and space instrumentation. Sold as a complete unit type ready for mounting to a servo motor.
Harmonic Drive · serves as: Gear Reduction, Torque Transmission, Precision Joint Motion, Joint Actuation.
Which group Harmonic Drive SHD-20 belongs to and how it is built
This subcategory covers components responsible for highly accurate torque transmission and speed reduction in robots, manipulators, and joint modules.
Harmonic Drive is a specialized strain wave gear valued in robotics for its high precision, very low backlash, and large gear reduction ratio in a compact form factor. It is widely used in the joints of industrial and humanoid robots, as well as manipulators with demanding accuracy requirements. Its compact construction enables the design of rigid, precise motion axes.
