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There are various sorts of drill bits made especially for wood, because it's soft and easy to cut. If they're used for metal, they'll go blunt very quickly indeed. Wood drills can be flat, in a spade shape. Or they can be a big coarse spiral with a tiny woodscrew thing at the tip. Or they can be cylindrical and short, also with a central pip or screw. Metal drills are simple spirals, and can also be used for wood. | There are various sorts of drill bits made especially for wood, because it's soft and easy to cut. If they're used for metal, they'll go blunt very quickly indeed. Wood drills can be flat, in a spade shape. Or they can be a big coarse spiral with a tiny woodscrew thing at the tip. Or they can be cylindrical and short, also with a central pip or screw. Metal drills are simple spirals, and can also be used for wood. | ||
===Cutting Speed/Teeth sizes=== | |||
The URLs below are very useful references: | |||
# http://www.raygirling.com/dpspeed.htm | |||
# http://www.ibiblio.org/twa/info/drillSpeedChart.pdf | |||
but do keep in mind that some of the numbers are relatively high - a lot of our (semi pro) tools do not quite have the power (or are rigid enough) to hit that (nor do we have sludge cooling). So aim a bit lower and go slower. | |||
===Bandsaw=== | ===Bandsaw=== | ||
