Premier Deep Hole Drilling Limited - The Deep Hole Drilling Process

There are three different systems for Deep Hole Drilling

	The Gun Drill System (move mouse over image for detail)
		For small diameters.
		Can easily be applied in a machining centre by using a pre-drilled hole for guidance.
		Note: requires high coolant pressure.

	The Single Tube System (move mouse over image for detail)
		In materals with poor chip forming properties such as stainless steel, and low-carbon steel.
		In materials with an uneven structure when chipbreaking problems exist.
		More advantageous for long series production.
		Uniform and extremely long work pieces.
		For hole diameters larger than 200 mm.
		Requires special deep hole drilling machine.

	The Ejector System (move mouse over image for detail)
		Requires no seal between the workpiece and the drill bushing.
		Adapted easily to existing machines, preferable in conventional lathes, turning centres, machining centres and horizontal boring machines.
		For machining workpieces where sealing problems can arise.
		An advantage when it is possible to use a pre-drilled hole instead of a drill bushing for guidance, for example in machining centres.