In this part of the paper the analytical models for the prediction of the force system, established in Part 1, in conjunction with a complete geometric model of the spade bit, will be used in a systematic simulation analysis of the spade drill’s performance. The aim of this analysis is to identify the most desirable geometric characteristics of the different topological features of the spade bit that would result in desirable performance measures expressed in terms of reduced torque and thrust force. The obtained results are intended to guide the development of more efficient tools of this type.

Zhao, H., 2000, “Geometry and Mechanics of Spade Drilling Operations,” Ph.D. Thesis, Northwestern University, Evanston, Illinois.
Zhao, H., and Ehmann, K. F., 2001 (Under review), “Topology of Spade Drills for Wood Drilling Operations-Part 1: Spade Drill Point Geometry Definition and Part 2: Spade Drill Point Cutting Geometry Analysis,” ASME J. Manuf. Sci. Eng.
Zhao, H., and Ehmann, K. F., 2002, “Development and Performance Analysis of New Spade Bit Designs,” Int. J. Mach. Tool Des. Res.
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