Planetary gearbox
WITTENSTEIN alpha alpha RP+
alpha Premium Line high-torque planetary gearbox with flange output aimed at rack-and-pinion and heavy axes.
Key specifications
| Peak torque (max) | 10,450 Nm |
|---|---|
| Ratio | 4–220:1 |
| Backlash (max) | 3 arcmin |
Summarised in our own words from WITTENSTEIN SE's published data; series maxima, individual models vary. Last checked 2026-10-29. Source 1
Notes on this data
Grid values: 352-10,450 Nm, backlash <=1-3 arcmin.
Specify Motion is not affiliated with WITTENSTEIN SE. WITTENSTEIN alpha and alpha RP+ 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 WITTENSTEIN alpha 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 | alpha RP+ | P-II / P-IIR |
|---|---|---|
| Rated torque | — | 459 Nm |
| Peak torque | 10,450 Nm | — |
| Ratio (max) | 220:1 | 1,000:1 meets or exceeds |
| Backlash (lower is better) | 3 arcmin | — |
Apex Dynamics high-precision helical planetary with a one-piece stainless planet cage and very short length; ADS adds a keyed input shaft for belt pulley or coupling drive.
| Published maximum | alpha RP+ | AD / ADR / ADS |
|---|---|---|
| Peak torque | 10,450 Nm | — |
| Ratio (max) | 220:1 | — |
| Backlash (lower is better) | 3 arcmin | 1 arcmin meets or exceeds |
High-precision round-flange planetary with high input speed capability and near-zero backlash, aimed at robotics and CNC.
| Published maximum | alpha RP+ | WAE |
|---|---|---|
| Peak torque | 10,450 Nm | — |
| Ratio (max) | 220:1 | — |
| Backlash (lower is better) | 3 arcmin | 2 arcmin 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 planetary gearbox series
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