Fig. 2035.
[Fig. 2035] represents an emery planing machine. The emery wheel, which takes the place of the cutting tool of an ordinary shaping machine, is upon a spindle driven by the pulley a upon the spindle b, which is traversed endways by means of the connecting rod which is actuated by a crank e driven by the cone pulley c. The work-holding table g is traversed by the handle k or automatically through wheel h, which through suitable gearing drives the spindle i. The blower or fan is to draw off the cuttings and emery. It is obvious that any of the usual forms of work-holding devices may be employed.
Fig. 2036.
[Fig. 2036] represents an ordinary form of emery grinding machine for general purposes. a represents the frame affording journal bearing for the driving spindle driven by the cone pulley p, having the fast flanges f and collars c, which are screwed up to hold the emery wheel by the nut n, the direction of spindle rotation being denoted by the arrows. The thread at the end k of the spindle must be a right-hand one, and that at the other end l must be a left-hand, so that the resistance against the nut shall in both cases be in a direction to screw the nuts up and cause them to bind or grip the wheels more firmly, and not unscrew and release the wheels. Upon the frame a are the lugs d to carry the hand rests r and s, which are adjustable, and are secured in their adjusted position by the handle nuts e. The rest s is of the same form and construction as a lathe hand rest, while that at r is angular, to support the tool while applying it to the side as well as to the circumference of the wheel.
Fig. 2037.
[Fig. 2037] represents a machine for grinding the knives for wood-planing machines, and having a hand feed only. It consists of an emery wheel mounted upon a spindle and with a slide rest in front of it. Mounted on the slide rest is a frame for holding the knife, and a set-screw for adjusting the angle of the knife to the wheel. The slide rest is traversed by means of the hand wheel operating a pinion in the rack shown.