Cycloidal gearbox
Spinea TwinSpin H series (hollow shaft) cycloidal gearbox
Fully sealed hollow-shaft TwinSpin reducer for routing cables and hoses, five sizes with bores from 13 to 65 mm, rated torque up to 2,750 Nm and lost motion under 1 arcmin from size 140.
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What are you specifying?
Select everything you need. A motor, drive and gearbox can be specified together as one axis.
Key specifications
| Speed (max) | 5,500 rpm |
|---|---|
| Bore | 13–65 mm |
| Rated torque | 50–2,750 Nm |
| Ratio | 55–125:1 |
| Sizes | 70, 140, 170, 200, 220 |
| Rated life | 6,000 h |
| Mass (max) | 26 kg |
| Lost motion | <1.0 arcmin (<1.5 arcmin size 70) |
Summarised in our own words from The Timken Company's published data; series maxima, individual models vary. Last checked 2026-10-30. Source 1
Specify Motion is not affiliated with The Timken Company. Spinea and TwinSpin H series (hollow shaft) are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Spinea TwinSpin H series (hollow shaft) 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.
Apex Dynamics helical planetary range in inline (AE) and right-angle (AER) forms. AES/AESR are the all-stainless body versions with food-grade grease for washdown and corrosive areas.
| Published maximum | TwinSpin H series (hollow shaft) | AE / AER / AES / AESR |
|---|---|---|
| Rated torque | 2,750 Nm | — |
| Ratio (max) | 125:1 | 200:1 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 | TwinSpin H series (hollow shaft) | LCD |
|---|---|---|
| Rated torque | 2,750 Nm | — |
| Ratio (max) | 125:1 | 500:1 meets or exceeds |
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 | TwinSpin H series (hollow shaft) | LCS / LCSG |
|---|---|---|
| Rated torque | 2,750 Nm | — |
| Ratio (max) | 125:1 | 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.
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 H series (hollow shaft)
Send these with your enquiry and an engineer can confirm the right TwinSpin H series (hollow shaft) 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 H series (hollow shaft): frequently asked questions
Can you help replace Spinea TwinSpin H series (hollow shaft) 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 supply-network options where appropriate. We confirm compatibility and any changes needed before recommending a replacement.
What is the Spinea TwinSpin H series (hollow shaft)?
Fully sealed hollow-shaft TwinSpin reducer for routing cables and hoses, five sizes with bores from 13 to 65 mm, rated torque up to 2,750 Nm and lost motion under 1 arcmin from size 140. Published series figures include speed 5,500 rpm, bore 13 mm, bore 65 mm, rated torque 50 Nm. It is made by The Timken Company; Specify Motion can help source it or propose an equivalent.
Who makes the Spinea TwinSpin H series (hollow shaft)?
The Spinea TwinSpin H series (hollow shaft) 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 H series (hollow shaft)?
The published series maximum speed is 5,500 rpm. Individual models and sizes in the TwinSpin H series (hollow shaft) 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 H series (hollow shaft)?
We can assess suitable replacement options. On published figures, APEX Dynamics AE / AER / AES / AESR and LeaderDrive LCD 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
Engineer support
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Tell us how you use the Spinea TwinSpin H series (hollow shaft): the load, speed, duty and environment. Our engineers will confirm whether it is still the right part, find it for you, or propose an alternative that fits better.
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From enquiry to delivery
Send a part number or describe the application. Our engineers take it from there: the right product, a clear quotation, and delivery and support arranged.
- 01Tell us what you needSend a part number, or configure the application, quantities and timing.
- 02An engineer reviews itWe check the specification and find the original part, a checked equivalent or a complete axis.
- 03Receive your quotationProducts, pricing, lead time and compatibility notes in one reply.
- 04Order and deliveryWhen you are happy, the order is placed and delivery and after-sales support are arranged.