Speaking of Precision Blog

Speaking of Precision

Speaking of Precision is a knowledge preservation and thought leadership blog covering the precision machining industry, its materials and services. With over 36 years of hands on experience in steelmaking, manufacturing, quality, and management, Miles Free (Milo) Director of Industry Research and Technology at PMPA helps answer "How?" "With what?" and occasionally "Really?"

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Recycle Your D*** Carbide!

Posted January 29, 2013 10:35 AM by Milo

One of my pet peeves is to walk into a shop and see, on each and every horizontal bench surface next to a machine, a handful or two (or three!) of used, burnt, failed, worn and unidentifed carbide inserts.

It's like they are the nest of an invisible shop bird, who builds nests everywhere in hope of raising a family.

I never see any eggs in these nests though. just plenty of carbide.

[The materials in these inserts needs to be recycled. DO IT NOW!]

On my last trip to the West coast, I stopped in to visit the local Sandvik Facility in Cypress, California.

Machining Applications Engineer Grant Hughson showed me some of the advanced work that they were doing for customers. (It involved making large chunks of Titanium submit to the will of the engineers through some highly unusual milling pathways using some unique inserts. And they demonstrated an acoustic dampening system that attenuates vibration while in the cut. And a whole bunch of other cool, use it to make the Death Star kind of technology.) And he showed me the Sandvik Carbide Recycling program.

[Recycling carbide makes sense for your shop and the environment.]

But the simple elegance and utility of the Sandvik Recycling Program hit my nerve.

I JUST HATE seeing unidentified, partially used, or completely used carbide inserts just lying around in a work area.

NO GOOD THING CAN HAPPEN WITH THEM IN ONE'S WORKSPACE.

So take Grant's advice and get that used carbide collected, contained, and recycled.

Editor's Note: CR4 would like to thank Milo for sharing this blog entry, which originally appeared here.

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#1

Re: Recycle Your D*** Carbide!

01/29/2013 4:22 PM

My first introduction to one of the carbides was the acetylene lamp I picked up at a street market and used on my bicycle. It held enough calcium carbide and water to last me all evening. Because of that, it always strikes me as an arrogance when tungsten carbide is spoken of as "carbide"; only calcium carbide merits that single name.

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#2
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Re: Recycle Your D*** Carbide!

01/29/2013 4:59 PM

Fair enough, but in your example calcium too should have the same respect as Tungsten...

Every industry has its own jargon, and to our guys tungsten carbide is "carbide" and Titanium Nitride (TiN) is "tin."

Milo

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Re: Recycle Your D*** Carbide!

01/29/2013 7:40 PM

I really miss my carbide cannon. It could shoot crab apples hundreds of feet with a really cool bang too. It worked great until I gathered the resulting gas of manganese dioxide and hydrogen peroxide (O2) and prefilled the gas chamber. The resulting explosion destroyed the gun. Dad wouldn't let me have another. (:-( I still have a small scar on my right hand.

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#4

Re: Recycle Your D*** Carbide!

01/29/2013 9:07 PM

So are carbide cutters something that can be melted down and reformed into new carbide cutters and what not or do they make something else out of them?

Up till now about every machine shop I have ever been around always had a few buckets to a few barrels full of old broken or dull ones with no real clue as to what to do with them.

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Re: Recycle Your D*** Carbide!

01/29/2013 9:32 PM

Tungsten can be reclaimed for reuse. Melting point quite high, nothing amateurs csn do in their garage.Using zinc to replace cobalt binder can make the tungsten carbide brittle enough to reform into a powder. Tungsten carbide melts above 5000 deg F. Heres a link to a r claim furnace company. http://www.avsinc.com/zinc-reclaim-furnaces.html Milo

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#8
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Re: Recycle Your D*** Carbide!

01/30/2013 12:25 PM

I likewise had no idea they could be recycled! I'll pass this on...

At the density of tungsten carbide, it doesn't take a lot to make a pound, and at $11 a pound, it sounds worthwhile!

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#6

Re: Recycle Your D*** Carbide!

01/30/2013 12:06 AM

Whats the current price for carbide recycles?

Jon.

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Re: Recycle Your D*** Carbide!

01/30/2013 7:05 AM

JT's Machine is paying $11.00/Lb.

jtsmachine.com

sorry the link won't copt for me this morning.

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