Fig. 2821.
“When the body is much larger in diameter than the branch, a hole may be bored in the former to receive the end of the latter, by giving to the branch end a stem, as in [Fig. 2820], and then cutting in the body a recess for the branch end and its additional stem. This recess may be cut out in the lathe, chucking the body as in [Fig. 2821].
“Should it occur that one end of the T is of larger diameter than the other, one chucking V must be deeper than the other, and we may find their respective depths by the following process:—
Fig. 2822.
“Draw line a b, [Fig. 2822], which line represents the chuck face. Let point c represent the centre of the lathe. Mark line c e and set a pair of compasses to the radius of the body of the pattern at the centre of the branch location. Then take a radius from c and about 1⁄16 inch up from line a b, and with this radius we mark on the line c e the point e. From this centre we mark the two arcs having radii corresponding to the unequal diameters of the pattern at the location where the chucking V’s are to be placed. We then draw tangent lines to each of these arcs, and thus obtain the correct depth of V necessary to hold the axial line of the pattern parallel to the lathe chuck.