A substantially zero clearance clamping pivot shoe having a top camming member and a bottom camming member, each camming member including camming elements. A top clamping element and a bottom clamping element disposed between the camming members for clamping a portion of a track within which the shoe is disposed. The clamping elements each including camming surfaces and braking surfaces such that as a window to which the shoe is attached pivots, the camming surfaces and the camming elements interact to urge the clamping elements together to clamp the portion of the track therebetween.