Streamline Design: Single Coupling Adapter for Any Motor.
We’ve resolved your motor-gearbox compatibility concerns. Our new universal coupling system allows you to pair Helical In-line and Helical Bevel gearboxes with any motor type—IEC, NEMA, AC, DC, or Servo—using a single, standardized cover.
How it Works?
The system uses two precision-engineered steel half-couplings joined by a high-durability synthetic elastic element. The motor-side hub features an integrated clamping device, providing a secure, 360° grip on the shaft. This eliminates the need for a traditional keyway, ensuring a more balanced and reliable power transmission.


ALU Series
ALU Series Compatibility Guide
| Standard Shaft: | Inch | mm |
|---|---|---|
| GB 402 | 0.75 | 18 20 |
| GB 502 | 1.00 | 25 28* Special |
| GB 633 | 1.125 | 30 |
| GB 903 | 1.375 | 35 40* Special |
ALU Series
- Die-cast aluminum housings and input flanges
- Cast iron feet and output flanges
- Ground-hardened helical gears
- Permanent synthetic oil long-life lubrication
- Housing in standard Grey RAL 9006
IRON Series
IRON Series Compatibility Guide
| Standard Shaft: | Inch | mm |
|---|---|---|
| GHB 423 | 1.5 | 40 45 |
| GHB 433 | 2 | 50 |
| GHB 443 | 2.375 | 60 |
IRON Series
- Robust cast iron housings
- High degree of modularity
- Lubrication with synthetic oil
- Coupled to motor with flexible coupling
- Epoxy powder coating RAL 7016 standard

Versatile Motor Compatibility
Change motor types (IEC to NEMA or AC to Servo) simply by swapping the motor-side half-coupling and flange. No need to replace the entire gearbox.
Unlock Servo Potential
The keyless clamping design is built for high-performance brushless motors. Handle rapid accelerations, sharp decelerations, and instant reversals without the risk of shearing a keyway.


Zero Fretting
Traditional sleeves often “weld” to the motor shaft over time due to contact oxidation. Our dual-steel half-coupling design ensures the motor always slides off easily, even after years of operation.
Cooler Operation = Longer Life
The synthetic elastic element dampens vibration and reduces heat transfer. Lower operating temperatures mean your oil seals and lubricants last significantly longer.

Request a Quote
Other Products to Consider:
Parallel Shaft Helical Gearboxes for Offset Mounting Applications
Gearsync – Helical Parallel Series
Featuring a parallel shaft design that minimizes installation footprint in tight spaces, this gearbox is offered in 5 sizes.
-
Design: Space-Efficient Parallel Reducers for High-Torque Industrial Machinery
-
Capability: Rugged Parallel Shaft Gearing with 3,000Nm Torque Output
-
Flexibility: Multi-Mount Parallel Gear Units for NEMA and IEC Motor Frames





