Planetary gearbox
FAULHABER GPT planetary gearheads
All-metal planetary gearhead family from 14 to 42 mm with very fine ratio steps, plus high-torque (HT) and low-noise (LN) versions.
Key specifications
| Outer diameter | 14–42 mm |
|---|---|
| Rated torque (max) | 18 Nm |
| Ratio | 3–1,437:1 |
Summarised in our own words from Dr. Fritz Faulhaber GmbH & Co. KG's published data; series maxima, individual models vary. Last checked 2026-10-29. Source 1 · Source 2
Notes on this data
Continuous torque up to 0.4 Nm (14GPT) to 18 Nm (42GPT); 32GPT HT 10 Nm. Ratios 3.3-1437 (14/16/20GPT), 3-1294 (22/32/42GPT). Backlash described only as 'minimal' - no figure published, so backlash_arcmin_max left out.
Specify Motion is not affiliated with Dr. Fritz Faulhaber GmbH & Co. KG. FAULHABER and GPT planetary gearheads 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 FAULHABER 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.
Apex Dynamics economy planetary family (PE, PG, PA, PS, PN, PD, PL sub-series) for high-volume automation; standard backlash, inline or right-angle.
| Published maximum | GPT planetary gearheads | P-II / P-IIR |
|---|---|---|
| Rated torque | 18 Nm | 459 Nm meets or exceeds |
| Ratio (max) | 1,437:1 | 1,000:1 |
High-rigidity Wanshsin inline planetary with three backlash classes down to super-precision, for machine tools, automation and AGVs.
| Published maximum | GPT planetary gearheads | WSH |
|---|---|---|
| Rated torque | 18 Nm | 2,400 Nm meets or exceeds |
| Peak torque | — | 7,200 Nm |
| Ratio (max) | 1,437:1 | 100:1 |
| Backlash (lower is better) | — | 1.5 arcmin |
Wanshsin inline planetary designed for high radial loads, offered in three precision classes.
| Published maximum | GPT planetary gearheads | WTH |
|---|---|---|
| Rated torque | 18 Nm | 2,050 Nm meets or exceeds |
| Peak torque | — | 6,150 Nm |
| Ratio (max) | 1,437:1 | 100:1 |
| Backlash (lower is better) | — | 1.5 arcmin |
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 planetary gearbox series
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