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mistercrash
Guelph, Canada, eh!
 
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Posts: 1,083
Join Date: Sep 2007
Location: Guelph, Ontario, Canada
09.11.2009, 08:55 AM

I don't use cutting oil when I make the holes in the spur with a carbide bit. I don't let the bit get warm and the metal is relatively thin. I would use cutting oil with cobalt bits. I used cutting oil when I made the threads, it's more like a wax. Something like this.

http://www.fastenal.com/web/products...3126544&ucst=t


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