Pressure-activated ID grooving tool

A pressure-activated ID grooving tool, comprising:

• a tool body displaced about a central longitudinal axis having an annular geometry, said tool body having a shank end and a working end, said tool body having a channel formed therein spanning from the shank end to a piston bore, a front cross slide slot and a rear cross slide slot projecting from the working end toward the shank end, two legs extending from the piston bore to the working end, each leg radially disposed between the slots so that a central cavity is formed therebetween;
• a piston disposed within the piston bore;
• a slide arm extending from the piston toward the working end, said slide arm having an extension face and a retraction face forming an acute angle relative to the central longitudinal axis;
• a cross slide disposed between the front and rear cross slide slots, said cross slide having a cross slide pocket formed therein, the cross slide pocket having a slide engaging face immediately opposing the extension face of the slide arm and a slide retracting face immediately opposing the retraction face of the slide arm;
• an insert mounted on the cross slide,
• an end cap attached to the legs;
• an adjustment screw threaded into the end cap and having a spring guide projecting toward the shank end;
• a spring coiled around the spring guide;
• and
• a plunger fitted over the spring guide and in contact with the spring and the slide arm,
• wherein, when fluid within the channel and the piston bore is pressurized, causes axial movement of the piston toward the plunger, which in turn causes the extension face of the slide arm into contact with slide engaging face of the cross slide to cause the cross slide to move in an outward radial direction, thereby pushing the insert into contact with a workpiece, and
• wherein, when fluid within the channel and the piston is no longer pressurized, causes the spring to engage the plunger against the slide arm, which in turn causes the retraction face of the slide arm into contact with the slide retracting face of the cross slide to cause the cross slide to move in an inward radial direction, thereby withdrawing the insert away from the workpiece.