jackscrews
Threaded lifting devices
Jackscrews are mechanical lifting devices that use a threaded shaft turned by a handle to raise or lower heavy loads.
They work on the screw principle—rotational force converts to linear motion, allowing one person to lift considerable weight: The crew used jackscrews to level the foundation.
Found in car jacks, leveling equipment, and aircraft landing gear.
Passed through an opening
- spindleRotating rod for thread
- leadscrewThreaded linear motion mechanism
- actuatorDevice producing controlled motion
- nutHard-shelled seed
gear · rotary · linear · torque · pitch · self-locking · trapezoidal · housing
Making flat or equal
- bracingRefreshingly keen or stimulating
- anchoringFastening securely to position
- securingMaking firmly fixed
- supportTo uphold or sustain
shoring · alignment · positioning · foundation · cribbing · blocking · structural · underpinning
Raising with effort
- elevationHeight above reference point
- raisingLifting or nurturing
- levelingMaking flat or equal
- hydraulicRelating to pressurized liquids
support · clearance · tonnage · stroke · extension · retraction · vertical · uplift
Tool for turning fasteners
Airborne transportation vehicle
- automotiveRelating to motor vehicles
- constructionProcess of building something
- stagingPreparing for presentation
- scaffoldingTemporary exterior work platform
trailer · outrigger · camper · RV · machinery · industrial · theater · rigging
threaded
Passed through an opening
- spindleRotating rod for thread
- leadscrewThreaded linear motion mechanism
- actuatorDevice producing controlled motion
nut · gear · rotary · linear · torque · pitch · self-locking · trapezoidal · housing · collar
leveling
Making flat or equal
- bracingRefreshingly keen or stimulating
- anchoringFastening securely to position
- securingMaking firmly fixed
support · shoring · alignment · positioning · foundation · cribbing · blocking · structural · underpinning · propping
hoisting
Raising with effort
hydraulic · support · clearance · tonnage · stroke · extension · retraction · vertical · uplift
wrench
Tool for turning fasteners
aircraft
Airborne transportation vehicle
- automotiveRelating to motor vehicles
- constructionProcess of building something
- stagingPreparing for presentation
scaffolding · trailer · outrigger · camper · RV · machinery · industrial · theater · rigging · formwork
jackscrewshydraulic lifts
Devices raising loads via fluid pressure
hydraulic cylinders · hydraulic rams · bottle jacks · scissor lifts · chain hoists