What is a carbide gun drill?

Carbide gun drill is also called deep hole drill, which represents advanced and efficient hole processing technology. It can be used not only for processing deep holes (diameter-length ratio 1:250), but also for processing shallow holes (diameter-length ratio 1:1). It consists of a drill shank, a drill rod and a drill bit welded together, with a through hole in the middle, which is suitable for drilling cast iron, carbon steel, copper, aluminum alloy, alloy steel, etc. The gun drill completes drilling, boring, and reaming at one time, and can process high precision (IT6-8 level), precision straightness (0.16-0.33mm/1000mm), and low roughness (Ra3.2- Ra0.1) hole. Its drilling speed can reach more than 30-100 m/min. At present, it is widely used in shipbuilding, automobiles, engines, locomotives, chemical machinery, nozzle oil pumps, mining machinery and hydraulic parts at home and abroad.

After the gun drill is worn out, it needs to be sharpened in time and correctly. When sharpening, the gun drill must be mounted on a special fixture on a universal cutting tool grinder or a special sharpening machine for sharpening. A resin diamond wheel with a particle size of about 120 can be used for sharpening. , Only the rear face of the inner and outer corners are sharpened each time. It is necessary to ensure the correct geometric angle and position of the blade tip.