(J) Effective Grinding

When several radii are to be ground (a), it is desirable to keep the radii equal, If possible (b). In this way a single grinding wheel suffices without redressing.

An analogous principle applies to grinding tapered shafts (a). if the tapers are equal(b), a single setup suffices for both tapers.

When only a portion of a shaft needs to be finish ground, this fact should be specified on the drawing, so as to avoid unnecessary machining. A diametral difference of about 0.040 in. between the two portions of the shaft would ensure recognition of the distinction and involve minimum turning.

When grinding between centers, as In (a), the driving dog would be held by means of a ground surface [left end in (a)). An additional unground surface, as in (b), for holding the driving dog, is preferable and also permits one-setup machining. The added shaft portion is removed after grinding.

Levers which are Integral with shafts (a) should be designed so as not to interfere with the grinding wheel, for example, by necking the shaft adjacent to the lever (b).