Harmonic driveModel THD-20CS
THD-20CS Harmonic Drive, Cup Slim Series, Size 20
Size 20 ultra-short cup-type harmonic drive. Ratios 50:1 to 100:1, rated torque 17–28 N·m at 2,000 rpm input, backlash under 20 arcsec. ₹41,282 + GST, same price for every ratio.
- Rated torque
- 17N·m
- Peak torque
- 39N·m
- Backlash
- 20 arcsec
- Efficiency
- —%
Overview
Ultra-short cup with keyed input. Saves axial length where every millimetre counts, while staying a drop-in component set.
Typical uses: collaborative robot wrists, AGV and AMR steering modules, compact pan-tilt heads, medical positioning devices.
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 | 17 | 39 | 24 | 69 |
| 80:1 | 21 | 46 | 30 | 81 |
| 100:1 | 28 | 57 | 34 | 95 |
Input speed: up to 6,500 rpm maximum, 3,500 rpm average. Design life: 9,000 h at 50:1, 10,000 h at 80:1 and 100:1.
Ordering
Order code THD-20CS-XX, where XX is the ratio (for example THD-20CS-80). Price ₹41,282 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-CS Cup Slim Series |
|---|---|
| Size | 20 |
| Construction | Component set, ultra-short cup with keyed input |
| Ratios | 50:1, 80:1, 100:1 |
| Order code | THD-20CS-XX (XX = ratio) |
| Rated torque at 2000 rpm | 17–28 N·m |
|---|---|
| Limit for repeated peak torque | 39–57 N·m |
| Limit for average torque | 24–34 N·m |
| Limit for momentary torque | 69–95 N·m |
| Backlash | < 20 arcsec |
| Max input speed | 6,500 rpm |
|---|---|
| Limit for average input speed | 3,500 rpm |
| Design life | 9,000 h at 50:1, 10,000 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 | 17 N·m | 39 N·m | ≤ 20 arcsec | —% | ₹41,282 | Made to order |
| 80:1 | 1 | 21 N·m | 46 N·m | ≤ 20 arcsec | —% | ₹41,282 | Made to order |
| 100:1 | 1 | 28 N·m | 57 N·m | ≤ 20 arcsec | —% | ₹41,282 | Made to order |
Drawings and CAD
Drawings for this model are sent on request. Email us for the 2D drawing and STEP file.
Mounting and motor fit
- Input
- Keyed wave generator for direct motor-shaft drive
- Output
- Flexspline (short cup); housing and bearings by the customer
- 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-20CS
Is the price the same for every ratio?
Yes. The THD-20CS costs ₹41,282 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-20CS?
Use order code THD-20CS-XX with XX replaced by the ratio, for example THD-20CS-80. Send the order code, quantity and your motor model, and we confirm the coupling or adapter flange you need.
How is the motor connected?
The wave generator has a keyway, so it mounts straight on the motor shaft. Send us the motor model and we confirm the bore and key size, or make a coupling if the shaft does not match.
