What is the drill?

The

drilling rod is made of very high carbon steel and is used to produce drilling bits, taps, dowel pins and roller bearings. The drilling rod is also used in the production of hammers, files and strikes. The level of carbon used in steel is determined by its hardness. The drilling rod is sold in lengths usually 36 inches (91 cm) and in different diameters from 1/16 inches (1.5 mm) to 2 inches (5 cm) around or larger. The rod can also be made in a square design. In the production of hammers and files, drill with hardened water is used because the drilling rod is not strongly alloyed. This allows the material to be more easily machined than the oil drilling rod, although the tempered rod is not suitable for welding. On the other hand, the oil -touched drilling rod is easily welded and machined, is well suitable for general production of tools due to its long -term toughness.

In the water hardening process, the rod is heated until the cherry red and then plunged into the water vat and allowed to cool. This creates a toughA and durable product that is still easy to process. When the rod heats up into a cherry red color and then plunges into warm oil, the surface becomes extremely hard and damages most of the cutting tools. Therefore, these rods must have all their machining completed before the oil.

Depending on the intended use, some rods must be alleviated before machining. In order to alleviate steel, it must be heated slowly after dumping water or oil. By heating steel to approximately 800 degrees Fahrenheit (426 degrees Celsius), the hardness releases a little and the steel is more functional. Once steel is brought up to the temperature, it is left to cool. After cooling, the part may be polished.

The difference in water hardening and oil is that the water is finely the thermal conductor and cools the rod faster. The parts must not be circled in the water because it supports much faster cooling on the side of the tool that is promoted by coolant. This can cause deformation because the sides are cooled at different speeds. That is rozfeasting when creating accurate work pieces. When building a knife, the steel should only be flooded with straight movement up and down.