1.1 Standard Roller Chains. These chains are created for general usage.
1.2 POWERFUL Chains. These chains possess higher tensile strength and greater fatigue power.
1.3 Lube-Free Chains. These chains have longer use life than standard chains without lubrication.
1.4 Environmentally Resistant Chains. Chains with special corrosion resistance.
1.5 Specialty Chains, Type 1. For specific applications.
1.6 Specialized Chains, Type 2. For general designs.
Within these six groups, there are plenty of types of chains available

The drag chain test made with our equipment certifies the cable capability of bending along the chain path
The movement patterns are tell you the classic trapezoidal course profile for reflecting the strain put on the cable in the Customer’s application. The cable is usually subject to bending movement through trolleys that operate at high rate on precision guides, driven by cogged belts. It is possible to check up to 4 chains simultaneously with the same devices, with a pulling capability up to 3000 N
The test parameters (traversing distance, acceleration time, optimum speed and number of cycles) are adjustable and settable through a touchscreen panel. Through the test routine, the cables are checked by an exterior measuring system: in the event of cable break, the corresponding counter stops and the device continues to use and test the rest of the samples until their last break (this option can be modified based on the requirements).
All characteristics can be personalized according to Customer requests.
Our worm gear pieces cover a wide selection of applications. We demonstrate our years of experience and advanced of capability by producing more than 1 million worm gear sets every year in-house, the majority of which are manufactured according to custom specs.
Our catalog of worm equipment sets in line with the standard have diameters which range from 20 to 135 mm and axial distances of 17 to 80 mm. In addition, we offer custom worm gear sets with diameters as high as 300 mm and middle distances of up to 210 mm.
The catalog of worm gear sets can generally be supplied (from our) warehouse in a broad collection of axial distances and gear ratios with fine levels of differentiation. We can also calculate and produce customer-specific axial distances and gear ratios at the plant. We prefer to produce worm gear units for right-handed users, but these units can be created for left-handed users on demand.
We perform all main soft and hard machining methods in-house, including annealing in our own ovens. Because of extensive production depth, we are able to execute, also highly complex, machining tasks exactly according to customer expectations and in the highest quality. Find out more about it here.
1. Transmission Chains
Power transmitting chains are categorized into six major groups.

Go here to figure out why you require transmission chain.