Strain-wave (harmonic) gear
Harmonic Drive CPL-2A component sets
A lightweight hollow-shaft gear component set with low inertia and a small outer diameter, for designs that supply their own output bearing. It is also offered with Harmonic Drive's Triangle tooth technology.
Key specifications
| Bore (max) | 36 mm |
|---|---|
| Peak torque (max) | 372 Nm |
| Ratio | 30–160:1 |
| Sizes | 14-32 (five sizes; individual sizes not listed on page) |
Summarised in our own words from Harmonic Drive SE / Harmonic Drive LLC's published data; series maxima, individual models vary. Last checked 2026-10-29. Source 1 · Source 2
Notes on this data
Harmonic Drive SE (CPL is an SE product). Figures on the page conflict: the header gives ratios 30–160 and torque 9–372 Nm, while the meta text gives 50–160 and repeatable peak 18–372 Nm. Five sizes are stated across 14–32. The hollow shaft is 13.5–36 mm. No rated torque, speed or backlash figure is published on the page.
Specify Motion is not affiliated with Harmonic Drive SE / Harmonic Drive LLC. Harmonic Drive and CPL-2A component sets are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Typical applications
Alternatives that meet or exceed these figures
Engineers often come to us with a Harmonic Drive part number and leave with an alternative that is easier to source, quicker to deliver or a better fit for the machine. These 3 series from our supply network are the closest match on published figures.
Cup-type strain-wave gear component sets for building your own joint; the LCSG high-torque version lifts capacity by around 30% over the standard LCS.
| Published maximum | CPL-2A component sets | LCS / LCSG |
|---|---|---|
| Peak torque | 372 Nm | — |
| Ratio (max) | 160:1 | 500:1 meets or exceeds |
Hollow-shaft strain-wave gear units with a large central bore for routing cables and services; LHSG is the high-torque version (over 30% more torque).
| Published maximum | CPL-2A component sets | LHS / LHSG |
|---|---|---|
| Peak torque | 372 Nm | — |
| Ratio (max) | 160:1 | 500:1 meets or exceeds |
Ultra-flat cup-type strain-wave gear with a very short axial length, light weight and high stiffness for its size.
| Published maximum | CPL-2A component sets | LCD |
|---|---|---|
| Peak torque | 372 Nm | — |
| Ratio (max) | 160:1 | 500:1 meets or exceeds |
Figures are the highest published for each series and are not always measured the same way. A higher figure is not automatically a better choice: mounting, duty cycle, feedback, connectors and approvals matter too. An engineer will check the fit against your application before recommending anything.
Other strain-wave (harmonic) gear series
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