| Mar 5, 2009 — These tools introduced by Autodrill Co., come with a 1/2" shank, making them suitable for use in many common drilling machines. For occasional use these tools will work if sufficient thrust and torque is available. For high volume uses, like automatic drilling, these shortcomings show. These shortcomings, such as tooling wandering, oversized holes, and long cycle times can be improved. A simple improvement is to specify "split point" drills when purchased. The more common variety of S&D drills can be reground to a split point by use of a narrow grinding wheel and some experience.
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