Machine Acme 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. (See Image 1 in Figure 1 Below).

Compression Load

A load that tends to "squeeze" the screw. (See Image 2 in Figure 1 Below).

Overturning Load

A load that tends to rotate the nut radially around the longitudinal axis of the screw. (See Image 2 in Figure 1 Below).

Side Load

A load that is applied radially to the nut. (See Image 2 in Figure 1 Below)

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. (See Image 2 in Figure 1 Below).

Figure 1