Supply PowerMaster Model "J" Industrial Duty Jackshaft
type operator for use on
Standard Lift Sectional Doors and Rolling Service Doors
and Grilles. Primary reduction shall be by heavy duty VBelt
Drive. Secondary reduction shall be a chain and
sprocket arrangement. Reduction stages shall be
arranged so that mechanism is self locking when torque
is applied at output shaft. All reduction shafts shall be a
minimum of 1" in diameter, supported by bronze oilite
bearings. Operator shall provide an adjustable torque
limiting clutch.
Motor shall be of the high starting torque, continuous duty
industrial type, protected from overload by a current
sensing or thermal type overload device. Motor controller
shall be a heavy duty, full voltage, across the line,
magnetic reversing contactor, that is mechanically and
electrically interlocked.
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