Harmonic driveModel THD-25C
THD-25C Harmonic Drive, Cup Series, Size 25
Size 25 cup-type harmonic drive component set. Ratios 50:1 to 120:1, rated torque 39–67 N·m at 2,000 rpm input, backlash under 20 arcsec. ₹36,518 + GST, same price for every ratio.
- Rated torque
- 39N·m
- Peak torque
- 98N·m
- Backlash
- 20 arcsec
- Efficiency
- —%
Overview
Classic cup-type flexspline component set. The most compact way to build a harmonic joint into your own housing and bearings.
Typical uses: robot arm joints with their own housing, rotary indexing tables, semiconductor wafer handling, optical and telescope mounts.
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 | 39 | 98 | 55 | 186 |
| 80:1 | 63 | 137 | 87 | 255 |
| 100:1 | 67 | 157 | 108 | 284 |
| 120:1 | 67 | 167 | 108 | 304 |
Input speed: up to 5,600 rpm maximum, 3,500 rpm average. Design life: 10,000 h at 50:1, 15,000 h at 80:1 and above.
Ordering
Order code THD-25C-XX, where XX is the ratio (for example THD-25C-80). Price ₹36,518 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-C Cup Series |
|---|---|
| Size | 25 |
| Construction | Component set: wave generator, flexspline and circular spline |
| Ratios | 50:1, 80:1, 100:1, 120:1 |
| Order code | THD-25C-XX (XX = ratio) |
| Rated torque at 2000 rpm | 39–67 N·m |
|---|---|
| Limit for repeated peak torque | 98–167 N·m |
| Limit for average torque | 55–108 N·m |
| Limit for momentary torque | 186–304 N·m |
| Backlash | < 20 arcsec |
| Max input speed | 5,600 rpm |
|---|---|
| Limit for average input speed | 3,500 rpm |
| Design life | 10,000 h at 50:1, 15,000 h at 80:1 and above |
|---|
| 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 | 39 N·m | 98 N·m | ≤ 20 arcsec | —% | ₹36,518 | Made to order |
| 80:1 | 1 | 63 N·m | 137 N·m | ≤ 20 arcsec | —% | ₹36,518 | Made to order |
| 100:1 | 1 | 67 N·m | 157 N·m | ≤ 20 arcsec | —% | ₹36,518 | Made to order |
| 120:1 | 1 | 67 N·m | 167 N·m | ≤ 20 arcsec | —% | ₹36,518 | 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
- Wave generator, bored to suit the motor shaft
- Output
- Flexspline (cup); output bearing and housing 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-25C
Is the price the same for every ratio?
Yes. The THD-25C costs ₹36,518 per unit, ex-works Rajkot, excluding GST and freight, for any ratio (50:1 to 120:1). MOQ is 1 piece; ask for volume pricing from 10 pieces.
How do I order the THD-25C?
Use order code THD-25C-XX with XX replaced by the ratio, for example THD-25C-80. Send the order code, quantity and your motor model, and we confirm the coupling or adapter flange you need.
Do I need my own housing and output bearing?
Yes. THD-C is a component set (wave generator, flexspline and circular spline) built into your own housing and bearings. If you want a housed unit with an output bearing, look at the THD-H Hat or THD-HB Hollow Bore series.
