Plastic Chain

Nov. 15, 2002
The variety of plastic chain available includes traditional designs with discrete links that connect to form almost any length, and newer designs that include one, two, and three parallel strength members.

The variety of plastic chain available includes traditional designs with discrete links that connect to form almost any length, and newer designs that include one, two, and three parallel strength members. The traditional chain form of separable links is available from 0.125 to 6-in. pitches, and newer styles from 0.098 to 0.5 in.

The advantages of chain over belts is that it can be assembled around obstacles, is readily connected to form almost any length, and has favorable load and life ratings. Typically, a 0.125-in. pitch chain of acetal resin has a break strength of 7 lb, a working load of 5 lb or less, and need not be replaced until elongation exceeds about 3%. Large pitch link chains typically use a steel pin to link units together. Models with 6-in. pitch typically have an average ultimate strength of 5,500 lb and an allowable working load of 1,500 lb.

New style chains, sometimes called cable drive chain, combine features of link chain and synchronous belts. Generally, these chains are molded plastic links on 7 7 stainless-steel wire-rope strength members. On single strength member chains, plastic links or drive pins are either dowels or cross shaped. Pitch-to-pitch accuracy is 0.0005 in. Pitches are as small as 0.1 in. on single strand designs while transmission power ranges to 7.5 hp on larger three-cable styles.

Cable chains are available in stocked circumferences and can be spliced on site. Typically, on-site splicing derates the chain load by about 50%.

Advantages of the cable chain are that there is no play between teeth and cogs, they operate with commercial spur gears, mount on discs or inside rings to produce the effect of external or internal gear teeth, and require no lubrication.

Sponsored Recommendations

The entire spectrum of drive technology

June 5, 2024
Read exciting stories about all aspects of maxon drive technology in our magazine.

MONITORING RELAYS — TYPES AND APPLICATIONS

May 15, 2024
Production equipment is expensive and needs to be protected against input abnormalities such as voltage, current, frequency, and phase to stay online and in operation for the ...

Solenoid Valve Mechanics: Understanding Force Balance Equations

May 13, 2024
When evaluating a solenoid valve for a particular application, it is important to ensure that the valve can both remain in state and transition between its de-energized and fully...

Solenoid Valve Basics: What They Are, What They Do, and How They Work

May 13, 2024
A solenoid valve is an electromechanical device used to control the flow of a liquid or gas. It is comprised of two features: a solenoid and a valve. The solenoid is an electric...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!