Deep drilling is used to bore deep holes (usually at least 10 times the diameter) or to produce cylinders or barrels. It differs from conventional drilling in that vibration reduction is essential to prevent the long drill bit from breaking. Modern equipment is used to ensure this.
Deep drilling is usually carried out in one of two ways, which differ essentially in the method of cooling and in the method of chip removal, which is carried out either on the outside or on the inside of the drill. After drilling, additional metalworking techniques can be used to improve the straightness, smoothness and surface finish of the countersink hole and add more complex features.
Deep hole drilling shall be carried out using 2A450, MC – 032, 2D450, PT601, 2A55 drilling rigs. It is possible to drill holes or cylinders with a diameter of 50 mm, 63 mm, 63,5 mm, 80 mm, 90 mm, 120 mm, 160 mm, with an outside diameter of not more than 270 mm and a length of not more than 3000 mm.
Deep hole drilling is also used for the manufacture or refurbishment of extrusion cylinders.
