Proper use of screws

Advantage over those same screws nails - ease of disassembly, the possibility of repeated use and more reliable fastening parts. Screws differ not only in size but also shape the head. It is flat, Oval and semicircular. Shape slot is either a Phillips or diametrical. Varies greatly in the screws thread profile. Unlike screw thread of the screw more subtle, sharp and deep, with a conical escaping at the end.

Before you apply the screw driving, you need to think of ways mounting position, mark it and then prepare a hole for the screw. You must first make a hole in the details, which will host the screw head. Then through the hole on this detail is planned and a hole in the next part. The total depth of the holes for the screws should be slightly larger than the screw. Holes with an electric drill is easiest.

If a small screw in diameter and thickness of parts is small, the holes can be pierced with an awl. Diameter holes for screw driving should be at 15-20 percent less than the diameter of the screw to screw it in than the threaded inside. The drill is why we must take a little more subtle, considering that the diameter of the drill hole is always greater than the diameter of the drill. Otherwise the connection will not be durable. In detail, which will remain head of the screw is allowed punch by screw auger with a diameter equal to the screw. Hammer screw with a hammer is not allowed!

Why do so must first make a hole for a screw? In the finished hole screw screwed much easier, reduces to zero the risk of cracking wood, wood screws practically does not deform under thread can that provides a more dense, reliable and durable connection.

Preparing the holes for screws, care must be taken and how will settle the screw head. If you head to hide, then under it in the first part drill a shallow hole. If the head is semicircular, diameter drill bit should match the diameter of the head. If the head is countersunk, used drill a larger diameter hole doing is only part of the conical drill.

It is time to screw the screw. Screwdriver or the tip of the screwdriver should fit the head size and the shape of its slot. To screw screwed into lighter and do not rust, you can lubricate it with engine oil or petroleum jelly. After assembling all the parts it is desirable to check the tightness of each vkruchennogo finally screw.