Cycloidal gearbox
Spinea TwinSpin E series cycloidal gearbox
TwinSpin reducer with threaded and through holes in the case and integrated high-capacity bearings, seven sizes TS 70 to TS 220, 50 to 1,250 Nm rated torque and up to 3,125 Nm acceleration torque.
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Key specifications
| Speed (max) | 5,000 rpm |
|---|---|
| Rated torque | 50–1,250 Nm |
| Peak torque (max) | 3,125 Nm |
| Ratio | 33–169:1 |
| Sizes | TS 70, 80, 110, 140, 170, 200, 220 |
| Rated life | 6,000 h |
| Mass (max) | 22.4 kg |
| Lost motion | <1.0 arcmin (TS 110-220); <1.5 arcmin (TS 70-80) |
Summarised in our own words from The Timken Company's published data; series maxima, individual models vary. Last checked 2026-10-30. Source 1
Notes on this data
Not fully sealed by default; fully sealed version on request.
Specify Motion is not affiliated with The Timken Company. Spinea and TwinSpin E series are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Spinea TwinSpin E series replacement and alternative options
Use these supply-network options as a starting point for an engineering check. We can also help source the original Spinea part. Published series figures do not establish an exact-model or drop-in replacement: confirm ratings, fit, interfaces and approvals for your application.
Right-angle version of the high-rigidity WSH, with a spiral bevel stage and ratios up to 200:1.
| Published maximum | TwinSpin E series | WSHR |
|---|---|---|
| Rated torque | 1,250 Nm | 1,400 Nm meets or exceeds |
| Peak torque | 3,125 Nm | 4,200 Nm meets or exceeds |
| Ratio (max) | 169:1 | 200:1 meets or exceeds |
| Backlash (lower is better) | — | 4 arcmin |
Right-angle high-radial-load WTH variant using a spiral bevel stage.
| Published maximum | TwinSpin E series | WTHR |
|---|---|---|
| Rated torque | 1,250 Nm | 2,050 Nm meets or exceeds |
| Peak torque | 3,125 Nm | 6,150 Nm meets or exceeds |
| Ratio (max) | 169:1 | 200:1 meets or exceeds |
| Backlash (lower is better) | — | 4 arcmin |
Right-angle WVRB for heavier duty, offered in larger frame sizes.
| Published maximum | TwinSpin E series | WVRBR |
|---|---|---|
| Rated torque | 1,250 Nm | 2,000 Nm meets or exceeds |
| Peak torque | 3,125 Nm | — |
| Ratio (max) | 169:1 | 200:1 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.
Typical applications
What a cycloidal gearbox is
A cycloidal gearbox reduces speed with one or more lobed cycloid discs driven by an eccentric input shaft, rolling inside a ring of pins. Each input revolution moves the disc by one lobe, so high ratios are achieved in a compact stage. Many pins share the load, giving high torque capacity, stiffness and shock resistance. Precision robot types, often called RV reducers, add a planetary input stage and support the output with large integrated bearings. Backlash is typically very low.
When engineers choose a cycloidal gearbox
Choose a cycloidal reducer for heavy, stiff, shock-resistant joints such as robot bases, shoulders, positioners, turntables and machine tool axes. It handles high moment loads and impact better than strain-wave gears. The trade-offs are weight, size and cost compared with planetary units, and some ripple at the output. For compact light joints, a strain-wave gear is lighter. For general servo axes, planetary units are cheaper.
How to specify the Spinea TwinSpin E series
Send these with your enquiry and an engineer can confirm the right TwinSpin E series variant or an equivalent:
- Ratio (:1)
- Rated and peak output torque (Nm)
- Emergency stop torque (Nm)
- Moment and axial load on output bearing (Nm, N)
- Torsional stiffness (Nm/arcmin)
- Backlash and lost motion (arcmin)
- Input arrangement and motor interface
Common mistakes to avoid
- Ignoring tilting moment from offset payloads on the output bearing
- Not checking emergency stop torque
- Skipping the recommended grease change interval
- Sizing on average torque only
Spinea TwinSpin E series: frequently asked questions
Can you help replace Spinea TwinSpin E series or source the original?
Send the full model code, quantity and required date. Our engineers can check original-part availability and assess suitable alternatives, including Motion Control Products options where appropriate. We confirm compatibility and any changes needed before recommending a replacement.
What is the Spinea TwinSpin E series?
TwinSpin reducer with threaded and through holes in the case and integrated high-capacity bearings, seven sizes TS 70 to TS 220, 50 to 1,250 Nm rated torque and up to 3,125 Nm acceleration torque. Published series figures include speed 5,000 rpm, rated torque 50 Nm, rated torque 1,250 Nm, peak torque 3,125 Nm. It is made by The Timken Company; Specify Motion can help source it or propose an equivalent.
Who makes the Spinea TwinSpin E series?
The Spinea TwinSpin E series is made by Spinea (The Timken Company) and is listed here for engineers comparing options. Specify Motion is not affiliated with The Timken Company; brand names are used only to identify the product.
What is the speed of the Spinea TwinSpin E series?
The published series maximum speed is 5,000 rpm. Individual models and sizes in the TwinSpin E series range vary, so check the exact variant against your duty cycle, mounting and environment, or ask our engineers to confirm the right size for you.
Is there an alternative to the Spinea TwinSpin E series?
We can assess suitable replacement options. On published figures, Wanshsin WSHR and Wanshsin WTHR are options to assess from our supply network. An engineer confirms the fit against your application before recommending anything.
What is the difference between a cycloidal and a strain-wave gear?
A cycloidal gear uses rigid lobed discs rolling on pins, giving high stiffness and shock resistance. A strain-wave gear uses a flexible spline, giving compact high ratios and near-zero backlash at lower weight. Cycloidal suits heavy base joints; strain-wave suits lighter, compact joints.
What is an RV reducer?
An RV reducer is a precision cycloidal gearbox with a planetary input stage feeding two or more cycloid discs, plus a large integrated output bearing. The design gives high torque, stiffness and moment capacity in a compact package, which is why it is common in industrial robot joints.
Further reading: Harmonic vs planetary vs cycloidal · How to select a gearbox · Gearboxes and harmonic drives
Other cycloidal gearbox series
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