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Spherical Pivot Point (MC & XL Series)
The ram piston and striker cap have a spherical pivot point designed to prevent internal side loading. This feature reduces internal wear on seals and bearings and compensates for out of parallel tool conditions. A roll pin allows the striker cap to float and is designed to shear in extreme conditions. Small tools may be mounted upon the end of the spring returned ram piston
The 'Flow-By' Self Adjusting Stroke
Low-pressure (LP) advance stroke. As air pressure is applied to the air piston the HP piston assembly advances. The LP piston valve immediately closes and the ram continues to advance in a full linear fashion until resistance is encountered. Thereupon LP stroke is dissipated by hydraulic 'flow-by' principle which permits the air cylinder to continue its advance while the ram remains stationary until the HP stage is reached.
High Pressure (HP) power stroke. The HP piston rod seals the high-pressure chamber. The increased diameter of the HP chamber renders the LP piston powerless. This allows the oil to flow freely within the HP chamber as the LP piston advances. The force on the ram is increased due to the pressure being multiplied by the ratio betweeen the areas of the air piston and the area of the ram piston.
On the return stroke air is exhausted; LP valve immediately opens... allowing oil to flow directly through the piston. Springs return LP piston assembly and arm to 'rest' position.
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