Of tubes of different diameter, tightly placed one on another, you can build a jig for drilling end holes in cylindrical rods of various cross sections. For the outer bushings are better to use a steel tube with a thickness of 0.5 mm, and the inner insert can be bent any sheet metal. V. MARTINTON, Novocheboksarsk
Recommend to read
TO HELP THE GLAND
Utilities are widely used shut-off valves — they are in all water inlets in the house and each apartment. Earlier these devices were made of iron or steel: casing — cast iron, and the...
STEPS “HERCULES”
It is a model machine designed to operate in conditions of total off-road on rocky soils. Six powerful metal legs — its propulsion. Thanks to the wide step it can overcome large gaps,...
