The mechanic using the slide rest dreads to work the swivel for tapered work after he has once set it on the graduation mark, because it is quite difficult to set it absolutely parallel. The slightest error in setting the swivel will be exaggerated threefold in the work. When setting the slide rest with the attachment here shown, it is done accurately and very quickly. A small bracket is made and fastened on the slide rest with two machine screws. This holds an L-shaped piece marked A, which is pivoted on two pointed screws in the bracket. In setting the slide rest for turning parallel work, the L-piece is simply swung up, allowing the swivel part of slide rest to engage it.

Fig. 144 - Device for setling the slide rest..