SSJ Group is the leading manufacturer a supplier specializing in the production of various transmission parts. Such as sprocket, chain, pulley, couplings, gears, planetary gearbox, worm & worm wheel, bevel gear, spur gear & All kinds of transmission machinery spare parts.

Main Products

As one of the leading gear coupling manufacturers, mechanical product suppliers, and exporters, we supply gear coupling and many other products.

gear coupling-1
High torque density

Gear Coupling

A gear coupling is a flexible coupling intended to connect two shafts at their ends to transmit power to transfer rotational movement from one post to another. Each collar consists of two hubs with external gear teeth, corners are joined by flange sleeves with internal gear teeth, and flanges are bolted together.

High precision


Gears are used in tons of mechanical devices. Most importantly, they provide a gear reduction in motorized equipment. This is key because often a small motor spinning very fast can provide enough power for a device, but not enough torque, the force that causes an object to rotate on an axis or twist.



Sprockets are used in bicycles, motorcycles, tracked vehicles, and other machinery either to transmit rotary motion between two shafts where gears are unsuitable or to impart linear motion to a track, tape etc. Perhaps the most common form of sprocket may be found in the bicycle.


Corrosion-resistant and flexible


Chains are commonly found in various power transmission, agricultural, and industrial applications. This popular chain provides a reliable mechanism for transmitting power to many kinds of different moving parts. Conveyors, automotive, food and beverage, and farming equipment have boasted these popular and common types of chains to keep them running.

worm gearbox-1

High reduction ratios

Worm Gearbox

Worm gearboxes take a rated motor speed and produce a low-speed, high torque output based on the reduction ratio, offering users some advantages. In addition to high ratio speed reduction in a small package, worm gearboxes provide users with a high torque output multiplier. They can withstand shock loading better than other designs. Worm gear reducers are also low-cost and compact.

planetary gearbox-1
Low backlash

Planetary Gearbox

A planetary gearbox is an instrument with the output and input shafts aligned. A planetary gearbox is employed to transmit the most excellent torque in compact form. The design of the planetary gearbox is relatively simple, including a central sun gear, an outer ring (also known as an internal gear since its tooth face inward), a carrier, and the planetary gears. Input power to the sun gear results in spinning.

Ready to Buy?

We warmly welcome customers both at home and abroad to contact us to negotiate business, exchange information and cooperate with us.