Servo Cycloid / Two-Disc Gearbox
Achieve backlash-free, highly dynamic motion with maximum repeatability.
When precision, dynamics, and zero backlash matter, the 2S-R90 is the right choice
The servo cycloid two-disc gearbox (Cycloid Gearbox / Cycloidal Drive) is developed for high-precision positioning tasks where even the smallest movement must be transmitted backlash-free, reproducibly and reliably — even under changing loads and high acceleration.
Technical highlights of the 2S-R90 series
- Adjustable backlash: torsional backlash adjustable down to < 0.02°
- Torque range: 80–4,000 Nm nominal
(special designs exceeding 100,000 Nm available) - Ratios: up to 100:1 in compact installation space
- Sizes: 6 standard sizes (2S-R90/00 to 2S-R90/4)
- Moment of inertia: very low for fast acceleration
- Torsional stiffness: high for precise positioning
- Efficiency: high efficiency for energy-efficient operation
- Ideal for: robotics, rotary tables, handling & positioning systems
Additional sizes, gear ratios, and torque ranges available upon request.
Sizes in detail
The 2S-R90 series includes 6 gearbox sizes with the following nominal torque values:
| Size | Type | Nominal Torque |
|---|---|---|
| Smallest | 2S-R90/00 | 80 Nm |
| 2S-R90/0 | 150 Nm | |
| 2S-R90/1 | 400 Nm | |
| 2S-R90/2 | 1000 Nm | |
| 2S-R90/3 | 2000 Nm | |
| Largest | 2S-R90/4 | 4000 Nm |
Important:
Our solutions are typically based on modified standard gearboxes that we adapt to your dimensions, torque or interfaces — saving time and budget.
If your project requires more, we develop a custom gearbox together with you.
Benefits for servo & positioning applications
AKIM is more than just a gearbox supplier. We support you from concept to engineering, production, and long-term service.
Low moment of inertia
Enables fast acceleration and high dynamics of the servo axis.
High torsional stiffness
Ensures precise positioning with minimal elastic deflection under load.
High efficiency
Reduces energy loss and lowers operating costs during continuous use.
Smooth running
Minimizes vibration and improves control quality.
Easy motor integration
Speeds up engineering and reduces commissioning time.
Typical applications
Robot axes & gripping systems
Precise, repeatable motion at high dynamics and short cycle times.
Rotary tables & indexing drives
Exact angular positioning for machining, measuring, and assembly systems.
Machine tools & machining centers
High-precision axes and rotary tables for milling, turning, grinding.
Packaging & assembly systems
Fast synchronized motion for pick-and-place, handling, and assembly lines.
Can’t find your industry?
We develop solutions for almost any application.
Variants & options
- Different gear ratios per size
- Adaptable interfaces for servo or synchronous motors
- Special variants (e.g. hollow shaft, special flanges) on request
How we find the right solution together
Not every precision application is the same.
We support you with configuration, selection and integration of the 2S-R90 — and we will also tell you honestly if another gearbox is more suitable.
Our goal is not the most complex solution — but the right one for your application.
Our process:
- We understand your challenge
- We recommend the best solution
- We develop together
- We are here long-term
Downloads & technical data
Servo gearbox 2S-R90:
Servo gearbox 2SC:
Additionally available:
- 2D/3D CAD data (STEP, IGES on request)
- Interface drawings for motor connections
- Assembly & adjustment manuals
More than 100 years of engineering.
Today - for you.
AKIM is your Swiss specialist for cycloidal eccentric gearboxes and low backlash precision gearboxes. Since 1923 we design and manufacture robust, highly efficient gearbox solutions for demanding applications in robotics, machine building, pharma, food production, energy and more.
AKIM is now part of the ODT Group, benefiting from extended strength and resources.
Tailored Gear Solutions for Your Project
Whether you need a new development or a customized modular adaptation – we develop the right solution for your application.
Whether you need a new development or a customized modular adaptation – we develop the right solution for your application.
Contact usNot sure which gearbox is right for you?
Our chat-based product finder analyzes your requirements and suggests suitable solutions.
Ready for your gearbox solution?
Whether standard, high-performance, high-precision or fully custom — we help you make the right decision.
Frequently Asked Questions about AKIM Solutions
Which gearbox solution is right for me?
Describe your requirements to us — our engineering team will analyze them free of charge and determine the optimal solution. Torque, speed, installation space, precision, interface — we consider all relevant parameters.
What is the difference between your various solutions?
We develop different gearbox types for different applications. Some are optimized for high precision, others for compact design, and others for high-speed performance. We always recommend what truly fits your use case.
Are spare parts available for older AKIM gearboxes?
Yes. We supply spare parts even for gearboxes from the 1920s — our documentation is complete and archived.