Effect of Spindle Speed on the Drilling Length and Surface Finish in Deep Drilling Operation

	Effect of Spindle Speed on the Drilling Length and Surface Finish in Deep Drilling Operation
Iraqi journal of mechanical and material engineering
Article 1, Volume 9, Issue 3, 2009, Pages 427-441
Abstract
This research deals with studying the effect of spindle speed on the drilling length and surface finish for producing deep holes. Where experiments are done by using twist drills having (9, 10, 11) mm diameters by using samples of stainless steel under dry cutting conditions. The results show that increases of the spindle speed limits from producing drilling length and it has negative effect upon magnitude of drill deflection and its vibration , it keeping in mind the drill deflection and its vibration these have small diameter will be more for the drill that has big diameter . The speed and drill diameter have clear effect on flank wear land, in another word, with the increasing of speed and drill diameter, the flank wear land will increase. Also, there is a direct proportional relationship between the speed and drill diameter in one hand and the surface quality on the other hand, therefore; the roughness increase when the speed and drill diameter increases.

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