Product Announcement from Lowell Corporation
Lowell Series 70 ratchet clutches are self-contained versions of the ancient ratchet-and-pawl mechanism. They can be attached rigidly to or free-float on machinery and equipment. Uses include overrunning, backstopping, coupling and indexing. Their working parts consist of a rotating gear, two pawls, pawl springs, a control lever and a body to hold these parts in position.
By moving the control lever to the left, it engages the left pawl and disengages the right pawl; the gear may be driven in a clockwise direction only. When the lever is moved right, the other pawl is engaged and the gear may be rotated counterclockwise only. In addition to forward and reverse ratchet action, the ratchet clutch has a locking neutral position. A free running neutral position can be achieved by adding a second shifter. The control lever may be actuated by solenoids, cylinders, mechanical linkages or even manually.
The self-contained lever-controlled ratchet clutch is intended to compete with industrial electric, hydraulic and sprag-type mechanical clutches. It compares favorably on the basis of torque-vs.-weight, torque-vs.-price and torque-vs.-envelope. In overrunning service it also compares favorably in terms of efficiency and torque-vs.-overrunning-speed. Stock units are available with static torque ratings of 200 to 1,500 lb-ft. Maximum overrunning-speeds are between 250 and 60 rpm (lower speeds apply to larger torque/bigger clutch).
For lighter torque applications (under 200 lb-ft) Lowell offers the Series 700. Custom models are also available and everything is still 100% made in the U.S.A!