ACBAR Eccentric Gearbox
Achieve backlash-free, highly dynamic motion with maximum repeatability.
When extreme gear reduction, shock loads, and maximum robustness are critical, ACBAR Eccentric Gearboxes are the solution
The ACBAR Eccentric Gearbox was developed for applications where classic gear systems reach their limits.
Through cycloidal motion and rolling power transmission, they absorb high torque and heavy load changes reliably, delivering quiet operation in a compact form factor.
Technical highlights of the ACBAR series
- Sizes: 6 standard types (Type 11 to Type 501)
- Nominal torque: 80 – 1,000 Nm
(special versions up to 15,000+ Nm available) - Gear ratios: up to 13,600:1 in a single stage
- Design versions: flange design, foot housing, direct motor mount
- Lubrication: lifetime lubrication — practically maintenance-free
- Efficiency: high efficiency even under harsh conditions
- Operating temperature: suitable for standard industrial environments
Additional sizes, torque ranges, and ratios available upon request.
Sizes in detail
The ACBAR series includes 6 gearbox sizes with the following nominal torque values:
| Size | Type | Nominal Torque |
|---|---|---|
| Smallest | 11 | 80 Nm |
| 81 | 150 Nm | |
| 121 | 250 Nm | |
| 12/451 | 450 Nm | |
| 251 | 600 Nm | |
| Largest | 501 | 1000 Nm |
Important:
Most solutions are based on modified standard gearboxes that we customize to fit your space, torque or interface requirements - saving time and budget.
If your project requires more, we develop a special gearbox design collaboratively.
Advantages of ACBAR Eccentric Gearboxes
ACBAR is more than a gearbox — it's a robust drive solution for extreme applications.
Uniform load distribution
Rolling engagement avoids point loads on gear teeth — reducing wear even under heavy load.
High overload & shock resistance
Developed for frequent load changes and extreme shock loads — without performance loss.
Compact size with high reduction ratios
Very high reduction ratios achieved in a single stage — space-saving and mechanically efficient.
Smooth running
Cycloidal motion ensures uniform power transmission and reduced vibration, even under load.
Long service life in continuous operation
Built for 24/7 industrial duty — many systems have run reliably for decades.
Typical applications
Travel drives for mobile machines
Reliable power transmission under high load, frequent load changes, and harsh environments.
Hoists & winch drives
High overload capacity and controlled movement for heavy lifting applications.
Slew drives & rotary axes
Smooth rotational motion and durability under high torque loads.
Conveying & positioning systems
High availability and long lifetime in continuous, dynamic operation.
Can't find your industry?
We engineer gearbox solutions for nearly any application.
Variants & options
- Custom reduction ratios
- Different flange and shaft geometries
- Combination with pre- or post-stages
- Special seals & materials for demanding environments
How we find the right solution together
Not every precision application is the same.
We support you in design, selection and integration of the ACBAR gearbox - and we will openly tell you when another gearbox is more suitable.
Our goal is not the most complex gearbox, but the right solution for your application.
Our process:
- We understand your requirements
- We recommend the ideal solution
- We develop together
- We remain a long-term partner
Downloads & technical data
ACBAR Eccentric Gearbox:
Additionally available:
- 2D/3D CAD data (STEP, IGES upon request)
- Engineering & dimension drawings
- Assembly and setup 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?
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Whether standard, high-performance, high-precision or fully custom — we help you make the right decision.
Frequently asked questions about ACBAR Eccentric Gearboxes
Which applications are ACBAR gearboxes ideal for?
ACBAR Eccentric Gearboxes are suitable for high reduction ratios, heavy shock loads, and continuous duty. Typical uses include travel drives, hoist systems and rotary drives in harsh industrial environments.
How does ACBAR differ from classic gear transmissions?
Unlike conventional gearsets, ACBAR transmits force cycloidally and via rolling engagement. This distributes loads more evenly, increasing overload capacity and service life.
Are ACBAR gearboxes maintenance-intensive?
No. ACBAR units are lifetime lubricated and nearly maintenance-free in standard operation — reducing downtime and cost.
Can older ACBAR gearboxes be upgraded or replaced?
Yes. We offer retrofits, servicing and replacement parts — even for decades-old units.
Are spare parts available for old AKIM gearboxes?
Yes — we supply spare parts even for gearboxes from the 1920s. Our documentation is complete.