the one just described. The cutters _b_ and _c_ are
inverted and are used to face the flange at _d_ and to turn it to the
proper diameter. These cutters are held by the clamp _f_ and screws _g_
and are adjusted forward by the screw _h_. The cutter _j_, which
operates on top of the stock, rests on a bolster, of the proper angle
and is adjusted up or down by the screws _k_. The clamp _l_, which binds
against this tool, is beveled to correspond with the angle of the tool.
This clamp is secured by the collar-screw shown and it is leveled by
set-screws _s_. The adjusting screw _p_ prevents the cutter from
slipping back. The holes in the adjusting-screw plate are also slotted
in this case so that it will not be necessary to remove any screws when
the cutter has to be taken out of the holder.

A box-tool for finishing a treadle-rod cone for a sewing machine is
shown at _C_. This tool is also of the pilot type. The cutters in it
operate on opposite sides of the cone _a_. The inverted cutter _b_ sizes
the cylindrical part of the cone, while the front cutter _d_ is set at
the proper angle to finish the tapered part. The rear cutter _b_ is held
in place by the clamp _g_ and a collar screw. It is adjusted forward by
the screw _h_ in the plate _i_ which is held by screws as shown. The
pilot is retained by a set-screw, and it is easily removed by inserting
a small rod in the hole _l_ which passes through the shank. The cutter
_d_ is held by clamp _m_ and is adjusted by screw _n_ which passes
through a tapped hole in plate _o_. The screw holes in both the
adjusting plates _i_ and _o_ are slotted to facilitate their removal.

The box-tool illustrated at _A_, Fig. 10, is used for finishing the
bushing of a double-taper cone bearing _a_. The cutters are so arranged
that they all cut on the center; that is, the cutting edges lie in a
horizontal plane. The inverted cutter _b_ at the rear forms the short
angular surface, and the cutter _c_ in front forms the long tapering
part of the bearing. The large diameter is turned, to size by cutter
_d_. The pilot _e_ has a bearing in the bore nearly equal to the length
of the work and it is provided with oil grooves, as shown. The taper
shank of this pilot is tapped for the screw _i_ which extends the whole
length of the shank and is used to draw the pilot back to its seat. It
is not necessary to remove adjusting-screw plate _k_ to take out the
cutter _b_, as the latter can be drawn out from the fr