Classroom on demand

Welcome to Classroom on demand, your source for educational materials related to the vertical transportation industry. This site represents the knowledge and expertise of the best engineers and mechanics in the elevator industry, and will help those new to the elevator industry learn about the basic workings of elevator systems, and also will serve as a reference for people with more experience.

Step Chains

Large four inch pitch roller chains which form the connecting linkage between each of the steps and the drive machine motion of the machine is transmitted to the steps through the step chain.

Tags:  escalator


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