PG Series Harmonic Drive Gearbox Ratio 50/80/100:1 Harmonic Gear Reducer 20 Arc-sec
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PG Series Harmonic Drive Gearbox Ratio 50/80/100:1 Harmonic Gear Reducer 20 Arc-sec
Models:
PG14 for 50W 100W Servo Motor(8mm shaft)
PG20 for 60mm Servo Motor(11mm shaft)
PG20 for 60mm Servo Motor(14mm shaft)
PG32 for Nema 34 Motor(14mm shaft)
PG32 for 80mm Servo Motor(19mm shaft)
Features:
180° symmetrical tooth engagement
Single-stage reduction ratio: 30:1 to 500:1
Coaxial design, 3 components
Surface-contact tooth meshing
Compact size, lightweight
Continuous torque rated;
Applications:
Robotic joints, industrial robots, CNC rotary tables, laser markers, dispensers, optical and rotary test stages, precision drives, indexing heads, radar systems, printing machinery, winding equipment, woodworking machines, testing devices, automation systems
Package Includes:
1×Harmonic reducer
.jpg "PG Series Harmonic Drive Gearbox Ratio 50/80/100:1 Harmonic Gear Reducer 20 Arc-sec")
.jpg "PG Series Harmonic Drive Gearbox Ratio 50/80/100:1 Harmonic Gear Reducer 20 Arc-sec")
| Gearbox Specification | |
|---|---|
| Matching Motor Size | Nema 34 Stepper Motor / 60mm Servo Motor / 80mm Servo Motor |
| Input Shaft Diameter(mm) | 8mm / 11mm / 14mm / 19mm |
| Gear Ratio | 50:1 / 80:1 / 100:1 |
| Gearbox Type | Harmonic Drive Gearbox |
| Backlash at No-load(Max.°) | ≤20arcmin |
Mr.Anokhina – 12 Oct 2026
I have a couple of questions regarding specifications.
For output Flange Mounting screws – What is the Thread type for M8 Holes – Is it Fine or Coarse thread ? ( Screenshot attached )
Does Mounting screws are included with the Gearbox?
There is no screw with the gearbox. You will need to prepare mounting screws yourself.
Jason – 28 Mar 2026
This gearbox works well. The movement feels smooth. There's a little starting torque, but it turns easily with two fingers. The photo doesn't really show how big it actually is. The fit and finish are pretty precise—the washer sits really flat against the mounting surface.Overall, it's been solid. I'd order it again.
