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Both the BTA/single tube and double tube systems deal with how coolant is introduced to the cutting edge and how this coolant and the chips are exhausted from the machined bore. Regardless of which system is used another item of concern is the drilling method. The method that is used to bore a hole is dependent on your current drilling system. This includes, but is not limited to, your machine and coolant system. It is American Hellers experience that the majority of drilling problems can be solved with one of the following drilling methods. However, bore accuracy is dependent on the method chosen.
Stationary Tool / Rotating Workpiece
This is the most common method for drilling and boring long symmetrical workpieces. Extremely straight holes can be expected with this method.
Rotating Tool / Stationary Workpiece
Workpieces of any shape can be drilled and bored using this method. It is the accepted machine design for mass produced parts where automatic loading devices are used or where transfer lines are installed. However, straightness accuracy is not as good as in the previous system.
Rotating Tool / Rotating Workpiece (Counter-Rotation)
This method is used whenever straightness requirements are critical and the work can be rotated, as it gives the best results. Generally the part O.D. greatly exceeds the diameter of the hole being machined.
With over 50 years of deep hole drilling experience, American Heller Corporation is your specialized source for drilling systems wether it be tooling to machine retrofit to the design of a complete deep hole drilling system. Presented online is just some of our drilling products. If you have any questions concerning material presented here or you have questions concerning your particular deep hole drilling problem please contact us.
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