Jack

nounStandard termMechanical

A portable mechanical or hydraulic device lifts heavy loads over short distances.

This lifting tool uses screw threads, ratchets, or hydraulic cylinders to multiply human effort into massive lifting force. Mechanics and riggers use them to elevate machinery for maintenance, level heavy equipment during installation, or apply precise separating forces. They are rated by their safe working load and maximum stroke length.

Heard on the job

Grab the twenty-ton hydraulic jack so we can lift the skid enough to slide the vibration isolators underneath.