Quote:
Originally Posted by A Wolf
Tapered bits do cost substantially more than straight bits though. But even in ebony, a tool steel bit (not to mention carbide) would last through several hundred bridges before needing either replacement or sharpening. (Until I recently retired I owned a prototype shop, so am very familiar with tooling, spray booths, etc. Part of my 40 years of doing this also involved helping companies modify their designs and processes to allow for large scale manufacturing.)
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I am a manufacturing engineer and I work with aluminum castings. I would expect a carbide drill to last at least 5,000 to 10,000 pieces. A PCD (diamond) tool to last 120,000.
So with wood I would expect to change every couple of months. Just because of the principle of it. Cost is not that great.