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Machine Screw Jack Load Definitions

CAPACITY

The maximum thrust load - including shock - that can be applied to the nut without damaging the assembly.

TENSION LOAD

A load that tends to "stretch" the screw. 

COMPRESSION LOAD

A load that tends to "squeeze" the screw. 

OVERTURNING LOAD

A load that tends to rotate the nut radially around the longitudinal axis of the screw. 

SIDE LOAD

A load that is applied radially to the nut. 

CAUTION: Although a side load will not prevent the lead screw from operating, the nut is not designed to operate with a side load, such as those generated from pulleys, drive belts, misalignment, etc.

THRUST LOAD

A load parallel to and concentric with the axis of the screw.