Compound Screw Jack Consisting of a jack screw of 4 TP.I. and double start carrying load platform. The nut of the screw is fitted on a pedestal bearing and is keyed to a worm gear of 40 teeth operated by a worm screw. The spindle of the worm...
Screw Jack All metallic construction accurately machine cut screw with a pitch of 5 mm carrying double flanged turn table of about 20 cm diameter. Fitted on a heavy cast iron base and complete with two adjustable pulleys, cord and hooks....