A nail and a screwdriver located as shown, will help you out, if in the bustle of work had disappeared the key from the Chuck of the drill and the drill bit must be urgently replaced.
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DRILL-SHOTGUN
Once instructed the boys to handle on turning the glasses of the part having a stepped hole. The hole is cut, usually in two stages: first inserted into the rear Babin smaller drill bit...
THE WORM GEAR ON A LATHE
We offer to your attention a simple device with which a lathe can cut the worm wheel with any number of teeth. As the cutting tool used here is the standard tap mounted in the Chuck of...
