Ratios up to 13,600:1.
In a single stage. Maintenance-free.
The ACBAR eccentric gearbox transmits force through rolling contact instead of gear teeth — extreme reductions in minimal space, high shock resistance, lifetime lubrication. Built by AKIM in Altendorf, Switzerland.
Rolling contact instead of gear teeth
Inside the ACBAR, an eccentrically driven cam disc rolls on a ring of pins. The load is shared across many contact points simultaneously — not concentrated on a single tooth flank.
That is why the ACBAR tolerates overloads and shock loads that would damage conventional gearboxes, and achieves reductions for which other designs need multiple stages.
- Symmetrical, compact, coaxial design
- All moving parts run on rolling bearings
- Sealed all round, no oil fittings
- Any mounting position, direct fit for IEC standard motors
6 frame sizes — from lab drives to 1,000 Nm
A modular system: 12 mounting arrangements, standard ratios from stock drawings, reduced-backlash versions and special designs on request.
| Type | Nominal torque | Ratio (single stage) | IEC motor mounting |
|---|---|---|---|
| ACBAR 11 | 80 Nm | 2.5 : 1 – 8,855 : 1 | IEC 56 – 71 (0.06 – 0.37 kW) |
| ACBAR 81 | 150 Nm | 5.8 : 1 – 13,600 : 1 | IEC 63 – 80 (0.12 – 0.75 kW) |
| ACBAR 121 | 250 Nm | 7 : 1 – 8,007 : 1 | IEC 71 – 90 (0.25 – 1.5 kW) |
| ACBAR 12/451 | 450 Nm | 7 : 1 – 8,007 : 1 | IEC 71 – 90 (0.25 – 1.5 kW) |
| ACBAR 251 | 600 Nm | 4.5 : 1 – 10,152 : 1 | IEC 71 – 100 (0.25 – 3.0 kW) |
| ACBAR 501 | 1,000 Nm | 6 : 1 – 10,441 : 1 | IEC 80 – 112 (0.55 – 4.0 kW) |
Built for machines that must not stand still
Travel drives
Mobile machinery under high loads and rough conditions — rolling power transmission absorbs shocks that would destroy gear teeth.
Hoists and winch drives
Overload safety and controlled motion: high reduction in a single stage, near-self-locking configurations on request.
Slewing and swivel drives
Smooth running and high torque in minimal space — coaxial design, any mounting position.
A product line of AKIM AG
Which ratio does your application need?
Send us torque, ratio and installation details — our engineers reply within 24 hours with a concrete sizing proposal and quote.