High Preformance Drill for Copper

HYPER-TECH · Oct 15, 2020

Using standard cobalt drills works OK only I'd like to increase my feed rate and shave 5 or more seconds off the run time.
Drilling .250" dia. holes in 3/8"thk C110, and can't find a high performance drill.

AARONT · Oct 15, 2020

What size are you looking for? I would probably go with a Guhring solid carbide bright finish 118° drill. If it's a lot of holes per part, then maybe call them and see what they have with coolant through.

TeachMePlease · Oct 15, 2020

Can't really beat Mikron for high performance drilling. Guhring is a contender, too. Dunno what size you need, but Mitsubishi carbide is a safe bet, too. Are you willing to pay for them? In a similar performance vein, but lower priced, MA Ford drills kick some serious metal butt.

HYPER-TECH · Oct 15, 2020

.250"dia x .375"deep

thesidetalker · Oct 15, 2020

I do a fair amount of bus bars using these series. (and a similar 3flt kennametal drill)

Here's 1/4" GARR TOOL - Product Details

You can feed the snot out of them, no peck just use G81.

Lasts 1000s and 1000s of holes and hold size well.

boosted · Oct 15, 2020

Big fan of Guhring 5511's for an all-purpose high performance jobber drill. The Mits equivalent is just as good, but I think a touch more expensive.

However, I'm with sidetalker on this one - for a hole less than 2XD, you can just stab it with a 3 flute. No reason for thru coolant or fancy chip evacuation.

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High Preformance Drill for Copper

HYPER-TECH

Plastic

AARONT

Stainless

TeachMePlease

Diamond

HYPER-TECH

Plastic

thesidetalker

Stainless

boosted

Stainless

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