Coated Bits vs. Non-Coated

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rsetina
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Joined: Sun May 05, 2013 6:37 pm
Model of CNC Machine: Shark HD 2.0

Coated Bits vs. Non-Coated

Post by rsetina »

I've see there are both types and wonder what others think about the cost difference vs. durability. In your opinion, is it worth the extra money? There's so much experience here I'd like to know what you've discovered.
Rick

Shark HD 2.0

raymassez
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Joined: Wed May 15, 2013 3:36 pm
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Re: Coated Bits vs. Non-Coated

Post by raymassez »

I use carbide bits and don't have any problem with burning or tear out.

rsetina
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Posts: 208
Joined: Sun May 05, 2013 6:37 pm
Model of CNC Machine: Shark HD 2.0

Re: Coated Bits vs. Non-Coated

Post by rsetina »

raymassez wrote:I use carbide bits and don't have any problem with burning or tear out.
Thank you Ray. I'll order the less expensive ones. My wife will like that.
Rick

Shark HD 2.0

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Leo
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Re: Coated Bits vs. Non-Coated

Post by Leo »

I have near 40 years as an engineer in metal cutting.

I have conducted tests and Design of Experiments on various coatings.

I will vouch for good coatings, in metal cutting, but not in wood.

Wood does not need coatings and money spend on coatings for wood is not a good investment.

I will not use cheap cutters. I am a true blue believer in using the best cutters I can get - but not better than I need.

I do NOT buy coatings for my woodworking tools.

Coatings add lubricity (slippery) to the tool surface and they add hardness. They help with chip welding on the cutting edge of the tool. Wood does not "weld" to the tool surface.
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rsetina
Vectric Craftsman
Posts: 208
Joined: Sun May 05, 2013 6:37 pm
Model of CNC Machine: Shark HD 2.0

Re: Coated Bits vs. Non-Coated

Post by rsetina »

Thanks Leo. You've been very helpfull.
Rick

Shark HD 2.0

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