Page:Popular Science Monthly Volume 92.djvu/641

 Tricks of the Trade

An entire homemade punch operated by foot power. How to make laminated wood pulleys

��A Foot-Power Punch Press for Light Work

THIS foot -power punch press was made almost entirely of 2-in. pipe and fittings, built on a wood base 2 in, thick, 12 in. wide and 3 1 2 ft. long. The ram A consists of a piece of 1-in. cold rolled steel 2 ft. 1 in. long. The bushings BB, in which the ram works, are short pieces of pipe lined with babbit, as shown in the detail Fig. 1. The end on which the socket is fitted is turned to a diameter of 5-4 in. The socket is made from a piece of steel tube 1 1 2 in. in diameter with walls li in. thick. The punch is turned from tool steel }i in. in diameter to the required size, leaving enough shank full size to fit in the socket. The punch end is then tempered. The connect- ing arm C between the foot lever and the lever at the top consists of a }/2-^n. pipe flattened on the ends to fit between the parts of each lever. This piece is measured and fitted into place after the other parts have been assembled. The foot lever should be 12 in. from the base when the punch is raised as high as it will go in the bearings.

The die. Fig. 2, is made of a good grade of iron and fitted with a hardened steel bushing. Several of these bushings may be made with holes of varying sizes so that when the punch sizes are changed the bushing to match them may be changed also.

If it is desired to use the punch on large

��sizes of metal it will be necessary to make the die and holder in one piece, and of hardened tool steel. The die is securely fastened in the die-holder with two 3 2'in- cap screws which fit into slots in the angles GG. — C. A. Butterworth.

��Homemade Laminated Pulleys for the Small Shop

IN practically every shop cone-pulleys and plain pulleys are needed at some time or other, but for the mechanic of ordinary

Fig 2

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�� ���means they are expensive to buy. They can be turned from solid .blocks on a lathe, but a lathe is not al- ways available and even then the cost is con- siderable. By the following simple method pulleys which will not warp or split, and which will give as good results as the expen- sive pulleys, can be made at practically no expense.

Thin wood is easy to get and is easy to cut, and from this the pulleys are made. Hard wood should be used if it can pos- sibly be obtained. On a scroll saw, cut the wood into circles a little larger than the size of pulley wanted. Cut enough disks to build the pulley up to the right thickness. In each disk, drill a hole for the shaft, which should fit tightly.

Glue the disks together with the grain of each running in a different direction; allow a little extra thickness for truing up afterwards. Be sure the surfaces to be glued are free from all dirt and grease. Use good glue; if the common kind is

��jVM>lror\ Punch press made of pipe and fittings, which are set on a wood base. The punch is operated with a foot lever

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