Floating reamer holder

When using a reamer (or a tap) in a chuck (lathe of drill/mill) it is important for the reamer to "float": to follow the original bore without any side pressure caused by misalignment of the work-piece and the reamer. This can be the case even if the hole was bored in place and the reamer is not straight or the reamer holding chuck or collet are not perfect. In this simple design the reamer can self adjust both in concentricity and angle. The precision dowel pins are pressed in the two shaft, but free to slide/rotate in the bronze body - and yet there is no lost motion is the axial direction. The 1/2" shank fits in a collet or a drill chuck.