Harmonic driveModel THD-20U
THD-20U Harmonic Drive, Unit Series, Size 20
Size 20 harmonic drive unit. Ratios 50:1 to 100:1, rated torque 25–40 N·m at 2,000 rpm input, backlash under 20 arcsec. ₹44,457 + GST, same price for every ratio.
- Rated torque
- 25N·m
- Peak torque
- 56N·m
- Backlash
- 20 arcsec
- Efficiency
- —%
Overview
Complete ready-to-mount unit with motor flange and output plate. The fastest route from motor to working joint.
Typical uses: humanoid and quadruped robot joints, cobot joint modules, rotary actuators for automation, research and education robots.
Ratings
| Ratio | Rated torque, N·m | Peak torque at start/stop, N·m | Max. average load torque, N·m | Momentary max. torque, N·m |
|---|---|---|---|---|
| 50:1 | 25 | 56 | 34 | 98 |
| 80:1 | 34 | 74 | 47 | 127 |
| 100:1 | 40 | 82 | 49 | 147 |
Input speed: up to 6,500 rpm maximum, 3,500 rpm average. Design life: 10,000 h at 50:1, 15,000 h at 80:1 and 100:1. A 30:1 version is available at the same price; its rating table is available on request.
Ordering
Order code THD-20U-XX, where XX is the ratio (for example THD-20U-80). Price ₹44,457 per unit, ex-works Rajkot, excluding GST and freight, the same for every ratio. MOQ 1 piece; ask for volume pricing from 10 pieces. Send your motor model with the order and we confirm the coupling or adapter flange you need.
Ratings are typical values from manufacturer tests and are for guidance only. Real performance depends on installation, load, lubrication and environment; confirm your selection with Torqtron engineering. Photographs are representative of the series.
Technical specifications
| Series | THD-U Unit Series |
|---|---|
| Size | 20 |
| Construction | Complete unit with motor flange and output plate |
| Ratios | 50:1, 80:1, 100:1 (30:1 on request) |
| Order code | THD-20U-XX (XX = ratio) |
| Rated torque at 2000 rpm | 25–40 N·m |
|---|---|
| Limit for repeated peak torque | 56–82 N·m |
| Limit for average torque | 34–49 N·m |
| Limit for momentary torque | 98–147 N·m |
| Backlash | < 20 arcsec |
| Max input speed | 6,500 rpm |
|---|---|
| Limit for average input speed | 3,500 rpm |
| Design life | 10,000 h at 50:1, 15,000 h at 80:1 and 100:1 |
|---|
| Lubrication | Grease, supplied pre-greased |
|---|
Values at rated input speed and room temperature. See the datasheet for test conditions and service-life basis.
Ratios, torque and price
| Ratio | Stages | Rated torque | Peak torque | Backlash | Efficiency | Price excl. GST | Availability |
|---|---|---|---|---|---|---|---|
| 50:1 | 1 | 25 N·m | 56 N·m | ≤ 20 arcsec | —% | ₹44,457 | Made to order |
| 80:1 | 1 | 34 N·m | 74 N·m | ≤ 20 arcsec | —% | ₹44,457 | Made to order |
| 100:1 | 1 | 40 N·m | 82 N·m | ≤ 20 arcsec | —% | ₹44,457 | Made to order |
Drawings and CAD
-
THD-20U outline and mounting dimensions2D drawing, PNG, 155 KBDownload
Mounting and motor fit
- Input
- Motor flange with wave generator bore to suit the servo
- Output
- Output plate
- Lubrication
- Grease, supplied pre-greased
Need a different flange, housing or coupling?
We machine input flanges for any servo or stepper, custom output flanges, housings and couplings for this model.
Send your motor detailsQuestions about the THD-20U
Is the price the same for every ratio?
Yes. The THD-20U costs ₹44,457 per unit, ex-works Rajkot, excluding GST and freight, for any ratio (50:1 to 100:1). MOQ is 1 piece; ask for volume pricing from 10 pieces.
How do I order the THD-20U?
Use order code THD-20U-XX with XX replaced by the ratio, for example THD-20U-80. Send the order code, quantity and your motor model, and we confirm the coupling or adapter flange you need.
What comes with a THD-U unit?
The harmonic gear in its housing with a motor flange and an output plate, ready to bolt to a servo. Outline and mounting dimensions are in the drawing below; ask for the delivery drawing (2D or 3D STEP) before you machine mating parts.
