The amount of motion of the tapered pin is a function of the flowrate of the fluid.
The tapered pin includes a tapered outer surface (24) with threads (26) and causes expansion or contraction of the cutting portion when the tapered pin is screwed or unscrewed into the cutting portion.
A tapered pin (20) fitting the wall (14) is force fitted into the aperture to deform the intermediate portion outwards.
In another embodiment, the tapered pin (22') includes a coolant passage (35) provides fluid to the blades (18) during machining operations.
An expandable reamer (10, 10') includes a shank portion (12), a cutting portion (14) extending from the shank portion, and a tapered pin (22, 22') capable of being at least partially received in the cutting portion.
A control bar (7) is provided to separate the taper sleeve (6) from the taper pin, so the left and right handlebars (1,2) are in the vertical folded position by their weight.
A conical pin (27) is arranged in the bore (26), said conical pin preferaby having a shorter length than the bore (26).