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1:07 pm
NWBA Member
February 5, 2014
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So it seems a common oil quench is used motor oil or various mixes using it. If I am making a knife for food purposes, is this still safe to use? I assume that once its cleaned off and ground down its fine, but just wanted to get some more experienced input. Thanks so much!
12:16 pm
NWBA Member
April 19, 2010
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Ummmm-You need to tell us what KIND of steel you are talking about....-
1:36 am
NWBA Member
February 5, 2014
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I'm not sure why the steel would make motor oil more or less hazardous for use on food grade utensils. But so far I've just been using random old junk tools from thrift shops, so I don't really know.
8:41 pm
NWBA Member
Board Member
April 26, 2010
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Without knowing the steel type, one cannot say whether it will harden in iced brine, in water, in oil, or in air. You might need to mix up some superquench.
As to whether it would be food safe, you'll wash it, yes? Factory knives and custom knives get quenched in things even less appetizing than crankcase oil.
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