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Fig. 3230.

[Fig. 3230] represents a tenoning machine for heavy work, constructed by J. A. Fay & Co., adjusted for cutting a double tenon, the upper and lower heads revolving in a vertical plane, and the middle head in a horizontal plane.

a is a vertical slideway for the heads c, d, carrying the shafts for the cutter heads a, b. At b is the hand wheel for adjusting d, and at e that for adjusting c. The pulley d is for driving the cope heads, one of whose cutters is seen at c. The work carriage h is provided with rollers which run on the slide on k, and is supported by the arm i, which rises and falls to suit the cross motion of h. The fence g, for the work, is adjustable by means of the thumb nuts.

SAND-PAPERING MACHINES.

Sand-papering machines are of comparatively recent introduction in wood working establishments, but are found very efficient in finishing surfaces that were formerly finished by hand labor.