Charles H. Farnham
The amateur mechanic who wishes to do much of anything in metal working, generally has more or less work which calls for the use of a shaper, or at least
Plan of Shaper.
which could be most easily or best done upon one. The purchase of such a machine, even of the smallest size, means more expense than most amateurs can afford, so the only other solution is to make one. This
I have attempted to do, and am making very satisfactory although Blow progress, as the time available for this work is not large. Believing that other readers of Amateur Work may be in much the same position as myself in the matter of tool equipment, I will give a description of the work as it proceeds, together with the drawings necessary to illustrate it.
From an examination of the drawings accompanying this chapter, it will be seen that this machine is designed to rest upon a bench and be driven by hand or power, but it can also be fitted to a pedestal for footpower drive. An object kept constantly in mind when designing was the dispensing wherever possible with machine work which could not be done upon a 10 inch screw cutting lathe. All the bearings for traverse motions, therefore, are babbitted, and the gibs or sim-
Side Sectional View of Shapeb.
ilar bearing surfaces are made from flat dram steel, with the exception of that on the ram, which will have to be done outside on a planer. This will not be an expensive matter, nor will the cutting of the teeth in the large gear J. The pinion for this gear is a stock size, and can be obtained at small cost at any large gear cutting place.
The travel of the ram is about 7 in,; the traverse feed about 8 in., and the drop of the table will allow of about 8 in. under the tool. This capacity, while not large, is ample for most needs of the amateur. The traverse feed of the table is not shown in the illustrations given at this time, but may be automatic or by hand as desired. The screw for this feed works through a box bolted to the back of the table, the ends bearings on the stand being located after the box is in position by placing the table at one end and then at the other. As the vertical feed is generally sinall, this will be in hand feed only.
The ways for the vertical feed are made from flat bar steel, fastened to the stand with screws, the heads being countersunk. The outer edges of the ways project so as to give bearings for the gibs of the table which are made in the same way. The space between the faces of the ways on the stand and the table are babbitted, as shown by the heavy black places in the drawings which represent babbit metal
Front Sectional View of Shaper.
The table has holes cored in it, so that slots can be cut by the machine itself, when assembled, and of course the facing off of the table will be done in the same way. Most of the finishing of the tool holder will be done upon the lathe, although I may make a temporary holder, and with that make one nicely finished on the shaper.
The stroke of the ram can be adjusted by the stud 6, Fig. 2, access to which is had through the door in the side of the stand. The lever L gives a quick, positive motion to the ram, and the wearing parts, if kept well oiled, will last a long time.
The bearings for the driving shaft and also for the stud s are also babbitted, but the bearings for the shaft c at the foot of the lever L are drilled. The lever L is made from a piece of flat bar steel, and will be described in detail with the other parts as the work proceeds. Additional drawings with dimensions will be given when needed, so that anyone desiring to make the machine can follow the work with no difficulty. When the patterns are completed and castings obtained therefrom so that the cost can be determined, I will be pleased to get sets of castings for anyone desiring to nake up a machine, but at present writing cannot give an estimate close enough to warrant quoting prices. The subsequent parts of the description may also be more or less irregular, owing to the reasons before stated.