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Home Garage Doors Garage Door Openers Accessories About Us Specials Repairs & Services Service Area Customer Reviews Contact Us Rebates & Tax Credits What Not To Do Maintenance Recommended Contractors Before & After Pictures	Get a Free Keypad or Remote!   Garage Door Opener Commercial Jack Shaft Click on a  Door Operator for More Information . 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   MJ Medium-Duty Jackshaft Operator Model MJ is a Medium-Duty Logic jackshaft operator. It features a compact design, an adjustable friction clutch, a standard solenoid brake and a high-starting torque motor.       J Industrial-Duty Jackshaft Operator Model J is an industrial-duty jackshaft operator. It features a removable hinged electrical box cover, a continuous-duty high-starting torque motor, industrial ball bearings on the output shaft and a universal mount frame design.   HJ Industrial-Duty Hoist/Jackshaft Operator Model HJ is an industrial-duty hoist/jackshaft operator for use on rolling doors, grilles, and industrial sectional doors with high or vertical lift.   Back to Commercial Operators
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