dowel pin

[vvv_contractor]

Hello there,

 

i would like to drill a hole into a dowel pin.

any suggestion what type of endmills do i need to accomplish this task?

 

thank you for any advice.

 

voi

[Oppiz]

carbide

 

Most dowel pins are case harden.

[crazy^millman]

+1 carbide endmill to get throug hthe skin then can drill with cobalt then finish with carbide reamer if wanting it to be a tolerance hole.

 

Crazy Millman

[Müřlıń®]

Get an accu-drill carbide strait flute.

You can drill out a tap with these and they hold size like a spade drill because the outside has no relief so it wont cut.

 

I use kerosene and an acid brush and drill until its glowing then dab it....heh

 

kinda smoky....

 

You can also get a solid carbide spade drill....

Are a carbide blank with about a 7 degree included grind on the sides and a high angled-non split tip.

 

The accu drill is a split tip blank.

 

Murlin teh drill out busted taps all day long....

[Rekd™]

quote:

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You can also get a solid carbide spade drill....

Are a carbide blank with about a 7 degree included grind on the sides and a high angled-non split tip.

---

+1000

 

I actually make my own from busted carbide EM's. Real easy to do by hand.

 

My general speed/feed: 50rpm x .1ipm

 

'Rekd teh easy out

[Keith Graydon]

D-drill

[Andy]

Or, after you break off the carbide in the hole, you can EDM the hole. Coarse, if you dont have an EDM, this could be a problem.

[Müřlıń®]

quote:

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My general speed/feed: 50rpm x .1ipm

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Try bumping that puppy up to around 1200 and gouge on it When the tap starts glowing its time to dowse it with some kerosene and drill down another 1/4" until it glows again.....heh

 

Kinda hard to feel it on a CNC, I always drilled em out on a bridgeport....

 

 

quote:

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I actually make my own from busted carbide EM's

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+1000 back

 

Murlin teh dont throw anything away

[Harryman]

Dowel Pins... Crunchy on the outside, less crunchy on the inside If you think rotary axis, or collet block, you might punch through the case on each side B4 drilling through with .002 smaller twist drill and get a pretty nice hole.

[Müřlıń®]

quote:

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Crunchy on the outside, less crunchy on the inside

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LOL...U a funny guy Harry

Cracked me up good....still laughing...

 

But you are absolutly right, they are carburized

 

 

Murlin

[SledGeek]

What size Dowel ? What size hole ?

 

Many edm shops have "hole poppers" to put wire edm start holes in hardened material. premade electrode , cheap and quick. 5-10 minutes tops. probably cost less than the drill or endmill....no headaches.