
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
AEROPUER
Today we'll explain how on the basis of a moped or scooter (or rather, their main nodes) to make not too difficult aeropuer - a vehicle driven by a propeller. He walks well on ice and...
THE DOUBLE-SPRING BALANCE
All familiar household spring scales for weighing products, mining, fishing, hunter. This simple device is designed to weight up to 10 kg. Mu and if you need to weigh a load more heavy?...