Fig. 6.
Figs. 7,8.
Where cost is an object, a simple substitute for the boring collar is frequently made by the ordinary workman by a piece of board one inch thick, shaped like [Fig. 9,] with a single hole of the size most generally required; and the work is then fitted to the boring collar, instead of the latter to the work. In turning tool handles, for instance, where a few dozen are required all of the same size, or nearly so, a device of this kind, which can be made in a few minutes, is sufficiently effective. This form has been modified in two ways, and either will be found convenient. In the first, the conical hole is made of the largest size likely to be required, a set of boxwood plugs are then turned to fit this hole and are themselves bored in a similar way to suit various sizes of work. The form of these plugs is shown in [Fig. 10,] which is a side sectional view, and at B, where the same is shown in perspective. Two small screws or pins b, c, [Fig. 10], fitting into the holes a, a, [Fig. 9,] prevent these flange-shaped plugs from turning round in the board as the work revolves. The pattern of A, [Fig. 9], may be varied, and is better made of hard wood, and of a form which will afford a good bearing upon the lathe bed.
Fig. 9.
Figs. 10,11.