Comb. Planes


   
 

STANLEY - The Toolbox of the World


 
  The Making of the Cast Iron Carpentersí Plane at the Stanley Rule & Level Company - The Iron Age, Vol. 62, November 3, 1898, (New York: David Williams Co.) 1 of 4  

Few in the trade, and perhaps none out of it, appreciate fully the time, care, skill and peculiar refinement displayed in the manufacture of the highest grade iron body carpentersí plane.

A mere statement of the steps essential to the production of this tool would be a revelation to 99 per cent of those who handled it.

A book would be required to describe fully all the processes through which the raw materials pass. A lump of cast iron and a plate of steel are united in a product which is absolutely reliable and absolutely accurate in every way.

The blade is designed for cutting, and it may be relied upon implicitly to perform its duty. The body of the plane is true; even that most crucial test, the straight edge, will fail to permit the faintest ray of light to pass between it and the surface. There are others, but these two examples suffice to make our meaning clear.

The accomplishment of these ends is due to extended experience, the long exercise of wonderful mechanical ingenuity and the adaptation of those methods which will assure the best results from their combination.

Through the courtesy of the Stanley Rule & Level Company of New Britain, Conn, a representative of The Iron Age was recently permitted to examine many of the most important steps connected with the making of their planes and to obtain data necessary for a general description of the processes.

In the following no attempt will be made to follow either the body of the plane or the plane iron through the works as they pass from one operation to another. The aim has been to take up the work piece by piece and complete the work of one machine, even though the piece may in its progress leave that machine for another and then return.

The Cast Iron Body

The body of the plane has been pickled and perfectly cleaned before coming to the works, its appearance being as indicated in Fig. 2. It is made of high grade cast iron poured early in the heat and cast in molds which must be of the highest accuracy, this being rendered necessary by the thin and comparatively large surfaces of both the bottom and sides.

An extra portion of the metal is provided at the mouth in order to prevent chill which might otherwise occur if this part were made extremer thin. It is first snagged on the ends on a grinding machine, the true curve being obtained by this means.

The top and interior of the sides are then japanned. Two reasons are given for this: If the plane were machined before being japanned the high heat of the japanning oven might warp it out of true, and would certainly tend to discolor the finished surfaces.

Planing the Bottom and Sides

The bottoms of two planes are operated upon simultaneously in the planing machine in Fig. 3. Each body is held bottom up in a jig. One rests upon a stud projecting from the jig, an adjusting screw being provided under the other end in order that the surface may be maintained in accurate parallelism with the cutting movement of the tool.

The inner edge or facing sides of the two planes rest against the straight portion of the jig, while against the opposite or outside surfaces bear two swivel clamps, each of which is provided with two bearing points which rest against the plane. The clamps are brought forcibly against the plane, which is held in a rigid grip by a tightening bolt near the center of each clamp.

The plane is thus held against one straight edge, is supported vertically upon two studs, one of which is movable, and is clamped upon the outer side by the four bearing points of the swiveled clips.


 
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