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South Bend Lathe Booklets by Lindsay Publications

This bulletin illustrates and describes the up-to-date method of refacing valves. A modern back-geared screw-cutting lathe, of any size from 9-inch to 36-inch swing, fitted with an electric grinding attachment, is the practical equipment for valve grinding.

All sizes and all types of intake and exhaust valves for automobiles, aeroplanes, buses, trucks, tractors, stationary engines, air compressors, electric refrigerators, etc., can be refaced by grinding in the lathe. The graduated compound rest of the lathe may be swiveled to any angle required. The lathe spindle has a wide range of speeds for various sizes of valves of any material such as cast iron, steel and alloys.

Valve servicing in the modern automotive repair shop is no longer confined to lapping the valve to the valve seat and adjusting the tappets. The modern shop must be equipped to re-face the valve seats, install valve seat inserts, reface valves to the exact angle of the valve seat, make valve seat replacement rings, test and straighten bent valve stems, true rocker arm face for overhead valves, square the end of the valve stem, square the end of the tappet adjusting screw, square the end of the tappet, etc. The back-geared screw cutting lathe, (unlike the single-purpose machine,) will handle all of these jobs because it is a universal tool.

In addition to refacing valves, the lathe may be used for machining pistons, truing and undercutting armature commutators, boring rebabbitted connecting rods, making bushings and bearings, cutting left and left-hand screw threads and general machine work of all kinds. Only a few minutes are required to set up the lathe for refacing-valves and, when the valve work has been finished, the lathe may be quickly arranged for many other jobs.

South Bend Lathe Works January, 1935

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