High performance aerial and die mount cams

Improvements in aerial and die mount cams comprising, in combination:

• a slide cam having surfaces arranged in a pentagonal configuration having a central surface with a pair of guiding surfaces along opposite edges of the central surface and a pair of coupling surfaces along the outer edges of the guiding surfaces;
• said guiding and coupling surfaces being disposed at an acute angle and said guiding surfaces being disposed at an obtuse angle to the central surface;
• a cam adapter for engaging the slide cam to shift it and having surfaces arranged in a pentagonal configuration complementing the pentagonal arrangement on the slide cam and including a central surface opposed to the central surface of the slide cam, and a pair of guiding surfaces along opposite edges of the central surface of the cam adapter opposing and the guiding surfaces on the slide cam, and a pair of coupling surfaces along the outer edges of the last mentioned guiding surfaces;
• said central surfaces being disposed substantially perpendicular to the major loading forces to be imposed on the slide cam and cam adapter;
• opposed double wear plates secured to said opposed central and guiding surfaces;
• said wear plates having a bearing surface formed of bearing material and at least one plate of each pair having means for lubricating the bearing surface of the plate;
• keeper plates secured to one of the pair of coupling surfaces and having a bearing surfaces slidably overlapping the other pair of coupling surfaces to connect the slide cam and cam adapter for conjoint movement;
• and
• one plate of each opposed pair of discrete wear plates is of harder material than the opposite plate.