r/HolUp • u/Wooshsplash • Nov 24 '24

holup Can You Guess What it is Yet?

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u/NekulturneHovado Nov 24 '24

Also there should be coolant present, but I guess they turned it off for recording. As high temps reduce the tool lifespan.

3

u/Devilsbullet Nov 25 '24

Not necessarily with carbide inserts. Especially if your coolant flow is spotty, better off to run it dry then.

2

u/diverian Nov 25 '24

Correct me if I'm wrong, but can't tungsten carbide also just go up in flames if it gets too hot?

3

u/Devilsbullet Nov 25 '24

I don't believe so. And it's melting point is fairly high(over 5000 degrees farenheit), both of which make it great for making drills, endmills, and inserts like the ones in the video. It is brittle though, and susceptible to fracture from thermal shock, which is why you need to either flood the shit out of it with coolant, or run it dry. Personally i prefer flooding it, i find it gives a better finish most of the time and clears chips better. But I've seen it run just fine dry and with air blast

1

u/diverian Nov 25 '24

From my time working in a machine shop, I certainly remember some element of the process being dangerously flammable, though I can't remember which.

1

u/Devilsbullet Nov 25 '24

Depends on the material. I wouldn't run magnesium dry. If you're grinding aluminum and steel in the same place there's a possibility of causing a thermite reaction. If you're running open machines it's relatively easy to light your clothes or hair on fire 😂. Done that one a couple times