Fig. 1997.
As thin cutters would not have sufficient length of bore to steady them upon the arbor and insure parallelism, the cutter sleeve shown in [Fig. 1997], which is from The American Machinist, is employed to hold them. It is provided with a collar, is threaded at t for the nut n to hold the cutter against collar c, and is bored to fit the cutter arbor h, which corresponds to h in [Fig. 1993].
This device also affords an excellent means of holding two or more thin cutters requiring to be ground of exactly equal diameters.
Fig. 1998.
It follows from what has been said that taper tools, such as taper reamers, must be held with their upper face parallel to the line of their motion in being fed to the wheel, as in [Fig. 1998], in which line m represents this line of motion, line n the axis of the reamer, and line o the line on which the fixture that holds the reamer must move, o being parallel to m.