Boring and Milling Table - Home Model Engine Machinist

The drawings below give the dimensions to be used
in machining the adjusting screw and its parts
24 T.P.I.
8"
1¾"
.375
½"
WOODRUFF
KEY FOR
BALL CRANK
18 T.P.I.
.219
.500
.875
.812
.375
1" 1"
1"
1"
.375
.625
Left, the completed boring and milling table. Above, the base of
the column and the sleeve unit with the adjusting screw in place
TAP 3/8 - 24
.187
.687
.875
1½"
TAPER
DRIVE
FIT
.625
was then reversed, and 3/8"-24 threads were
cut on the other end, after which the keyway
for the ball-crank handle was cut in
exactly the same manner as that in the
column itself.
All the parts of the adjusting screw are
shown in Fig. 9. Although the ball-crank
handle can be made on the lathe according
to the dimensions given, one from a discarded
machine may be equally suitable.
Figure 10 shows these parts assembled on
the screw, and Fig. 11 the steel column and
the sleeve. The finished accessory is illustrated
in Fig. 12, ready for work.
NOVEMBER, 1941 191