DD
WORM GEAR ELECTRIC CYLINDERS
DD or “Direct Drive” worm gear driven Electric Cylinders incorporate
an alloy steel worm which drives a high strength bronze worm gear
(drive sleeve). The worm shaft is supported on anti-friction tapered
roller bearings with external seals provided to prevent loss of
lubrication (sealed radial bearings on the Series 5 and Series 10
units). The drive sleeve is supported on anti-friction tapered roller
or ball thrust bearings. The jack housing is made of ductile iron
and proportioned to support the rated capacity of the unit.
In operation, the drive sleeve rotates the
lift shaft causing the actuator tube to extend and retract from
the housing tube. Actuator tube must be secured to prevent rotation.
Motors can be mounted to DD Electric Cylinders
by using available standard motor mounts. For use in multiple cylinder
arrangements, DD Electric Cylinders can be supplied without motor
mounts.
The DD Electric Cylinders are available in
Acme Screw or Ball Screw versions and have a variety of worm gear
ratios resulting in a wide range of speeds and thrust capacities.
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