Duff Norton, a division of Columbus McKinnon Corp (CMCO), manufactures screw jacks, linear actuators, electric cylinders, rot ... ary unions, acme and ball screws, nuts and rail maintenance equipment. Together with our sister companies and distribution partners we can provide local service and support world wide. Customer service is a priority for us and we will work with our customers from the design stage through to order fulfillment. Please visit our website to learn more about our product solutions, write to us at sales@duffnorton.com, or give us a call. read more