Everyone who had to drill holes in the pipes or other parts of circular cross-section, knows that this is a difficult task. The drill bit often slips with printed core labels, and the holes are not strictly diametrically. However, to facilitate this work and to improve the quality of the holes, a special conductor is a metal bar M-shaped cross section with a series of holes under the most frequently used drill bits. To make the fixture very easy; we only need to remember that the axes of the holes must coincide with the axial plane of the bar.
Recommend to read
AND THE CHAIR, AND THE BED AND SOFA
Decided to respond to the invitation to become your author. I want to share a simple chair design that can act as a module to construct, for example, corner sofa, single or double beds....
“COMBINE” SOLDERING IRON
A good soldering iron stand is necessary for the radio Amateurs and all those who deal with soldering. Description of just such a fixture and is offered to attention of readers. The...
