Page:Popular Science Monthly Volume 92.djvu/627

 Popular Science Monthly

��Affixing a New Bearing Surface to an Engine Crankshaft

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��Front bearing on cranK shaft turned as shown by clotted line

��Worn part filled in I

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��'HEN a bearing becomes slightly worn it not only wears faster, but it may do a great deal of damage to the other wearing parts of the machine in which it is located. There is no part of an automobile that can cause damage quicker than the crank- shaft of the en- gine, and one loose bearing will soon cause wear on all the working parts. If the en- gine produces a "knock," remove the radiator and run the engine a few minutes.

This will usually give evidence of the worn part. Most engines have the front bearing solid, at least it was so in the engine to which this description relates. In this case the crankshaft was consider- ably worn and it was necessary to cut it down somewhat to obtain a new straight bearing. This was done as shown in the illustration. The space was filled in with a two-piece bearing, scraped to fit the shaft. It was drilled for oil holes and grooves were cut in it like the other bear- ihgs. To assemble it, set the crankshaft in the case and apply the two parts, then force it into the front bearing. Drill holes through th6 bearing and parts, and tap for setscrews to hold them in place. This will make such a bearing as good as new. — P. P. Avery.

��Small Wood-Working Clamps Made of Skate Parts

THERE are lots of little jobs in the shop where clamps are needed — gluing up small pieces of wood, for in- stance — and the ordinary clamps are too large. For such work, the clamps from old roller or ice skates can be used. Take the two clamps and the screw and use the skate key to tighten them on the work. Put a small piece of wood under each to prevent the work being bruised or dented. This is a cheap and accessible expedient as old skates are to be found in most households. — Kingsley Greene.

��Oil

Shaping a Bottle Cork to Make a Medicine Dropper

AVF]RY convenient form of medicine dropper may be made by any one upon a moment's notice by simply cutting two small notches in the sides of a cork, as .shown in the illustration. When in- serted in the neck of a bottle the liquid may be poured out in a regular intermittent flow of drops as slowly or as rapidly as de- sired. The neck of the bottle should be held just a little above the horizontal to prevent a too rapid flow, particularly in the case of poisons. — Floyd L. Darrow,

���How to Repair a Worn Wash Bowl Plug

A BRASS bowl plug had been in con- stant use for a long time and the wear rounded the edges on the underside as shown at A, the edge being a mere shell from the wear. The worn part was filed down as shown at B, next a screw

���Making a new contact surface of leather on the face of a worn wash bowl plug

terminal, C, taken from the end of a battery-carbon was soldered on as shown at D. With this attachment, two leather disks were secured to the surface with a nut. Then the edges of the leather were trimmed down to the original form of the plug as shown at E. — James M. Kane.

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