Page:Popular Science Monthly Volume 90.djvu/308

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��Popular Science Monthly

��rest in using a turning gauge, for truing the wheel.

The outer standard of the head stock is made of stock 3 in. square, and the inner standard of 2 by 3-in. wood. Holes i}4: in. in diameter are bored through these standards at the proper height for mounting the spindle, which may be of ^-in. shafting and about 12 in. long. Holes 3^ in. in diameter are bored vertically from the top of the standards to meet the i3^-in. hori- zontal holes. These holes receive the babbit metal which forms the bearings for the spindle. Four pieces about 3 in. square

��metal. The can must be without soldered seams or joints. A sharp V-shaped lip should be formed in the rim of the can for pouring the metal. A handle for the can may be quickly made by twisting a wire around it. It is well to heat the spindle before pouring the metal, otherwise the metal may be chilled and the casting spoiled.

The spindle may be heated by tilting the lathe sidewise and placing a small oil-stove or a large lamp below it. Having heated the spindle, place the lathe in an upright position and pour the melted babbit-metal

����END ELEVATION FRONT ELEVATION OF LATHE TAIL STOCK REMOVED

Side and end elevation views of the lathe without its attachments, giving general dimen- sions for the larger pieces in its construction and showing the location of the parts

��are cut from a rather thin board, and ^-in. holes are bored through their centers.

It is best to bore the holes before cutting out the blocks. These blocks are clamped or lightly nailed to the faces of the stand- ards so as to support the spindle in its true central position and in line with the bed of the lathe. The parts of the spindle that lie within the standards should be wrapped with a single thickness of paper, which may be pasted to the spindle. Putty should be used to close all cracks so that the melted babbit-metal cannot escape. Old type metal may be melted in an old baking powder tin can, over an ordinary gas or gasoline burner, and used for this babbit-

��in the vertical holes, filling them well to their tops. When the metal has set, remove the retaining blocks and remove the spindle from the bearings and then take off the bits of wrapping paper. Drill 3/8-in. holes down through the vertical extensions of babbit- metal to form oil- holes. The standards may be strengthened by bolting pieces of i by 3-in. material across their sides, above the bed.

If the craftsman has access to a foundry, a pattern may be made and a casting ob- tained for the face-plate which may be drilled to fit the spindle, to which it is secured by a pin. Another method of attaching the face-plate is to cut a screw

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