3900 Light-Duty Commercial Jackshaft Operator for Sectional Doors – Model 3900 is a light-duty jackshaft operator for light-duty commercial sectional applications only. It features a compact design ideal for limited height, cathedral, or obstructed ceiling installations. It may be used on standard and high-lift (maximum 7 ft. high-lift) sectional doors measuring up to 14 ft. …
3595 3/4 HP Heavy-Duty Chain Drive Garage Door Opener – You’ve got carriage house or custom-designed solid wood garage doors, and we’ve got the dependable 3/4 horsepower heavy-duty garage door opener to lift them. The LiftMaster® 3595 3/4 HP Heavy-Duty Chain Drive Garage Door Opener is one of the only three professionally-installed garage door openers with 3/4 horsepower …
3280 1/2 HP Belt Drive Garage Door Opener – Quiet and smooth, yet as tough as a steel-belted tire, the 3280 1/2 HP Belt Drive Garage Door Opener is the perfect choice if you want both quiet and smooth-running reliability, or simply have rooms positioned above your garage. The 1/2 HP heavy-duty motor is equipped with our …
Extension Springs serve the function of assisting with the opening of the Garage Door, which helps reduce the strain on the motor. Garage door extension springs are made specifically for a particular garage door height. Although there are often multiple spring lengths for a given garage door height, longer springs tend to be used on …
Torsion springs serve the important function of balancing the garage door by applying torque to the shaft with drums at each end. The torsion spring unwinds and winds as the door is opened and closed to comprise a balanced system. As with any system that involves tension, working with the torsion springs can be very …