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
SOLDERING IRON-“TELESCOPE”
No welding or modern technological methods of joining metal surfaces with a laser or super glue — not supplanted the old, but not aging method: solder. And it is promising new products,...
BABY WAREHOUSE
Those of adults who have visited any modern industrial warehouse, involuntarily think of the shelving principle, storage of products, tools or spare parts. But the Hungarian journal...
