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Chucking with the aid of the angle plate, or with the angle plate employed in conjunction with the chuck plate.

Suppose, then, we fasten the piece of work to the angle plate as shown in Fig.

It is obvious that the surface d may be turned down on the angle plate and bolted as before, the surface a being set parallel to the chuck plate surface as before, and all four of these surfaces will be finished true as required.

For f and the pin i we chuck the work on the angle plate, as shown in the plan view, Fig.

It is obvious that the angle plate requires counterbalancing, which is done by means of the weight w.