The previous thread got me to thinking about the andle of a drill bit. There are 118 degree, 135 dregee etc. what is best for wood. I'm talking twist bits.
[OP]
Member
The previous thread got me to thinking about the andle of a drill bit. There are 118 degree, 135 dregee etc. what is best for wood. I'm talking twist bits.
Dean
Moderator
118* is preferred for softer materials like wood, plastics and soft metals. 135* works best in harder materials.
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Andy Rooney
Member
A lot more going on in addition to tip angle with thickness of the web, materials, etc. Here is a chart from Triumph Drill:
Triumph_Selector.jpg
Member
No set rule for me. It depends entirely on what the purpose of the hole is. For example, if you want quick and rough, go for a greater angle, if you have thin material, go for a shallow angle etc. The comments from Bruce and Greg are the starting point. Cheers
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