But why have two different kinds of screws at all? What benefits does one have over the other? And why do we call the ...

control valves to reposition the crosshead. Clamp the Crosshead by rotating the control knob in a clockwise direction. Reposition the clamp ring on the loadframe column to prevent downward motion of ...

The machine consists of a dual crosshead, mechanical screw load frame, with a test surface platen having an effective area of 31 in. (79 cm) x 43 in. (109 cm). The platen is 45 in. (114.3) from the ...