Limits Adjustments Switch RTP Company End-Use Case Study Incorporating innovative features in their openers to make installation easier is nothing new for Chamberlain Group, Inc., the world’s largest manufacturer of garage door openers. One feature found in their Lift-Master and Chamberlain product lines is a limits adjustment switch. The switch allows adjustment of the door’s open and closed positions from a central location. Other openers require the use of position stops along the trolley rail. The switch’s contact carrier was originally made of ABS. Chamberlain determined the combination of the ABS carrier running on a molded acetal screw didn’t meet long-term wear resistance and close tolerance requirements. Chamberlain, along with molder Nyloncraft of Kentucky and RTP Company, determ

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