Middlesex County, Ontario | School Of Hard Knock - 12/15/2015 23:18
I have always wondered why they look triangle.
Just wondering.
The bit wants to walk in the hole because the edges of the bit grab. We can all imagine and agree with that I think.
Imagine the 2 corners of the bit basically form a straight line. Imagine a square. Your line (bit) is one one of the edges of the square. As you rotate your line (bit) the line will eventually lay on a different edge of the square. This cycle repeats as the line rotates. To visualize it look at square hole drilling videos, wankel videos, etc. Like other people are saying. If you've seen a planetary gear set in action; your bit is kind of like a planet gear and your hole is the ring gear.
This works for any shape. So why does the hole end up being a triangle? Well what shape has the least amount of sides?
Its maybe hard to explain in words. Basically its going to favour a shape with less sides, and there is no shape with less sides than a triangle.
Edited by WildBuckwheat 12/16/2015 12:29
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Why do drills make a triangle hole instead of round in thin sheetmetal
