The most usual class of packing-bushes are those like the one seen in the packing-box of Fig. 998, or like the larger Figure 997. Small bushes of this form are easily bored in a cup-chuck in the same manner as small glands, and are afterwards completed by turning the outsides while on an arbor. But large packing-bushes are finished on the chuck, and are treated in about the same manner as glands that do not require to be bushed. The bottoms or extremities of the stems belonging to packing-bushes are flat, no dish being required, through not being intended for contact with the packing. Two fixings in the lathe are sufficient to completely turn a bush of this sort, the dish-part and rim being turned at the first fixing, and the stem and one side of the flange at the second.

The bushes represented by Fig. 1019 are those employed for the glands shown in Figs. 995 and 1003. The stem of the bush is furnished with a dish, because this end is to bear upon the packing. The flange is a thin portion which prevents the bush being forced below the mouth of the packing-box, and is also a means of removing the bush when it may stick in the hole.

Packing-bushes of this class are seldom used for rods which are more than an inch and a half or two inches in diameter. Consequently, they are easily turned, either while on their respective rods, previous to the rods being finally reduced, or while on arbors which are fitted to them for the purpose.