Faceplant: Difference between revisions

Faceplant (view source)

379 bytes added , 23 February 2011

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-===Wood drills===
+===Drill Bits===
-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 types of drill bit depending on what it is you want to cut a hole in: masonry, wood or metal. The 'Space has examples of all three. In general metal drill bits are a simple spiral and often labeled HSS (this is often engraved, along with a diameter on the barral of the bit, don't always trust the box). Masonry bits will have a blunt 'spade' on the tip. Wood bits tend to have a small point at the tip and spurs, they can also be used for plastics.
+In general use the right type of drill bit. If a bit is carbon steel it is probably too brittle for metal.
+More info can be found here: [[http://www.diydata.com/tool/drillbits/drillbits.php]]
+Also see the speed guide here: [[http://www.ibiblio.org/twa/info/drillSpeedChart.pdf]] which has good schematics of the drill bit types
 ===Cutting Speed/Teeth sizes===