The large
screw jack utilizes three-foot 3/8x16 threaded rods.
Test results indicated that the
screw jacks failed at load and configuration combinations that were unlikely to have occurred prior to the collapse, This led investigators to conclude that the
screw jack failures discovered in the debris likely occurred during the bridge collapse and did not cause it.
The
screw jacks are said to be suitable for materials handling in sectors such as printing and carmaking.
Nook ActionJac Worm Gear
Screw Jack lift systems -- like the kind used to lift the piano man's piano -- are durably built and produced in standard models with load handling capacities from 1/4 ton to 100 tons.
The principle of the wedge is also found in V-belts, and the
screw jack.
The Mytho A automatic pallet stretch wrapper installed uses a unique
screw jack principle to raise and lower the film carriage.
The
screw jacks are arranged in a U configuration with a speed-increasing 1:5 worm gearbox based on a
screw jack gearbox used as the primary drive.
Metal jacks came in a wide range of sizes, from the small
screw jack for automotive use to heavy railroad jacks.
Also included are: electric
screw jack lift; 50 psig jacket for heating or cooling; 1" flush type discharge valve; 316 ss wetted parts; 150 grit sanitary finish to enable easy cleaning; 1/2 hp drive; reversible agitator blade; and 2-2" sight and charge ports in cover.
A
screw jack enables the operator to raise and lower the PolyPorter to level the pipe with the fusion machine in uneven terrain.
The cutting chamber can be opened with a mechanical or electrically driven
screw jack. The 1600 series has a 16 x 16 in.
An electric-motor-driven 32-tonne mechanical
screw jack is provided near the rear end of the leveling platform.
