Page:Popular Science Monthly Volume 88.djvu/154

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��Home-Made Drill Press

��EVERY lathe owner knows what an unsatisfactory job drilling in a lathe is, and a great many cannot afford to indulge their hobby to the extent of pur- chasing a drill press.

The following is a description of a drill press which employs the ordinary

���A drill press made from an ordi- nary round-shank breast drill

round shank breast drill and two cast- ings, the patterns of which were home- made, as was also the drill tal)le, which was turned in a foot-power lathe.

The attractive feature of this drill press is that the breast drill can be re- moved in a few minutes' time and used in the regular manner, and in the same length of time it can be reassembled.

To begin with, the breast drill must be one of the round-shanked type, which retail for about $1.50, and with a range of from to 3^ inch drills.

In the drawing may be seen the main casting. The casting is very securely fastened by screws to the bench. The pattern should be made of ^-inch stock, with the sides ribbed 54 inch so as to give greater strength. The bearings at

��Popular Science Monthly

the top and bottom should be cored a sufficient size to be liberally babbitted. The lugs are slotted with a hack saw and drilled and tapped for adjusting screws at the top and for a clamping bolt at the bottom.

The drill table is self-explanatory ; the shank and surface being the only parts that require machining. If the builde,r has a lathe this can easily be done ; but if not, a machinist will do the work at a low cost.

The feed lever is made of 3/16 x j^ inch iron or cold-rolled steel. Two pieces are hinged in an L form. The socket for raising and lowering the drill is made of pipe fitting, such as is used on awnings, lapped for a set screw.

To babbitt the casting a jig must be used in order to align the table with the drill properly. For this purpose pro- cure a piece of steel of the same diame- ter as the shank of the table. Turn down one end sufficiently to be gripped in the drill chuck, and with this rod it becomes possible.

How to Get the Most From a Football

AS a rule the tube of a football blad- der will crack oft" before the blad- der is worn out. This is due to the bending of the tube.

A bicycle valve cap will protect the stem and a pump may be used to bloA^ up the football.

To do this coat the outside of the valve with shellac, being careful iiot to let any get on the stem, and insert ■ it in the tube. Wind a shoe string around the outside of the tube to hold it firmly against the valve. When the shellac has set the shoe string may be removed.

��c

��A Help in Wire-Twisting

UT a notch in the center of a screw driver blade, about 1/16" deep, a:s

���A notch in a screw driver gives a

grip on wires to be twisted around

binding posts or sockets

shown in the sketch. This will be found •of great aid in bending wires around binding posts or sockets.

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