ARR began producing gear reducers and gearboxes in 2015. Since then, we have been dedicated to delivering high‑performance worm gearboxes, robust helical gearboxes, precision hypoid gearboxes, custom gear reducers, industrial speed reducers, and comprehensive transmission solutions to customers worldwide.
A variety of gear reducers and tailored services offer appropriate solutions for customer needs across diverse sectors, such as ceramic equipment, stone processing machinery, pharmaceutical machines, lithium‑battery production, environmental protection equipment, medical devices, cement industry, mining, construction machinery, conveyor systems, and more.

Gearboxes Mounted on Shafts
Model:
A1 / A2 / A3 / A4 / A5 / A6 / A7 / A8 / A9 / A10 / A11 / A12
Description
The A‑series gear units, designed for belt‑pulley, chain‑driven elevator conveyors and drive systems operating in hard‑to‑access areas, are distinguished by their easy‑maintenance characteristics.
Helical gear units featuring parallel input and output shafts.
A rigid-body construction composed of two parts.
System resistance calculations are performed according to ISO, DIN, and Niemann standards.
A free input shaft allows driving.
Various output options are available (hollow shaft, shrink disc, etc.).
Installed using a torque arm.
The housings are made of cast iron (GGG 40‑50) and steel (GG 20‑25).
The gears are fabricated from cast iron and 21NiCrMo2 case‑hardened steel.
Premium bearing and seal components are employed.
Customer special requests can be accommodated.
| Type | Shaft Mounted Helical Reducers / Speed Reducers / Reductors |
| Model | A1 / A2 / A3 / A4 / A5 / A6 / A7 / A8 / A9 / A10 / A11 / A12 |
| Ratio | 5 / 13 / 20 |
| Color | Silver Gray(RAL7042) |
| Package | Cardboard box, honeycomb cardboard, wooden crate with wooden pallet |
| Usage | Industrial machinery, food products, ceramics, chemicals, packaging, dyeing, woodworking, glass, and more |
| Flange | IEC‑standard milled or custom dimensions |
Features
1. Strong cast iron housing.
2. Wide range of sizes.
3. High carrying ability.
4. High efficiency.
5. Universal mounting.
Advantages
1. Unique housing design.
2. Long service life.
3. Low temperature rise.
4. Unique housing design.


