De-burring with drill made better

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nakedanvil

Aluminum

Joined

Nov 19, 2006

Location

A little NW of Mt. Rainy-er in Washington State

• Feb 26, 2009

• #1

I was deburring a bunch of holes in the drill press using a countersink. Well, I had a bunch of holes that were 1" and my csk was only 1" so I chucked up a large drill (as I've done countless time before). Just wanting to break the edges a little and hard not to get chatter. Got to thinking about how smooth my one-flute countersink works. So, I rounded off one lip of the drill so that only one lip was cutting. Really worked a treat! Like I said, not earth shattering.

Milacron: sorry for the first one. this better?

 

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Marty Feldman

Titanium

Joined

Feb 21, 2005

Location

Falmouth, Maine

• Feb 26, 2009

• #2

The importance of the title of your thread

Useful post -- thanks.

I hope that you will not react negatively to the fact that your first post was killed due to its uninformative title. The moderator's action was taken, I believe, in an effort to keep PM a sharp and efficient info exchange. To me, your second title, which was on target, got me to read your post and to let you know that it was useful. I reacted to your original title as the moderator did. I generally don't spend the time to open and read posts with meaningless (or "clever") titles.

Please keep contributing.

 

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machtool

Diamond

Joined

Jun 22, 2004

Location

Melbourne Australia

• Feb 26, 2009

• #3

Milacron: sorry for the first one. this better?

Click to expand...

Look on the bright side. At least he didn’t ping you for your profile location.
Where is Mt Rainy-er?

Regards Phil.

 

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nakedanvil

Aluminum

Joined

Nov 19, 2006

Location

A little NW of Mt. Rainy-er in Washington State

• Feb 26, 2009

• #4

was my error-no offence taken

I agree 100%. I was just too eager to disclaim the impotance of it. Thanks, Marty.

Machtool: that'ed be the 14,000 ft peak in Washington State

 

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simplesteelcutter

Plastic

Joined

Apr 5, 2007

Location

Russell, PA

• Feb 26, 2009

• #5

I use drills as countersinks on holes that I can't reach with a regular countersink. Try slowin down the rpm before taking the edge off a good drill. This technique seems to like very slow speeds.

 

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nakedanvil

Aluminum

Joined

Nov 19, 2006

Location

A little NW of Mt. Rainy-er in Washington State

• Feb 27, 2009

• #6

simplesteelcutter said:

I use drills as countersinks on holes that I can't reach with a regular countersink. Try slowin down the rpm before taking the edge off a good drill. This technique seems to like very slow speeds.

Click to expand...

Yes, I do that a lot too and agree it works fine IF you can apply pressure! When all you're trying to do is deburr that is not possible. Been my experience anyway, even at low rpm.

 

eKretz

Diamond; Mod Squad

Joined

Mar 27, 2005

Location

Northwest Indiana, USA

• Feb 27, 2009

• #7

It works fine as long as you are using a machine spindle (it must be rigidly held). Trying it by hand or in a floating vise will of course be a near impossible task (except by your new-found one-lipped drill method perhaps?) I'd just have bought the proper size c'sink, but in a pinch, your method sounds like it worked.

 

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nakedanvil

Aluminum

Joined

Nov 19, 2006

Location

A little NW of Mt. Rainy-er in Washington State

• Feb 27, 2009

• #8

Ekretz: Yeah, that was the case here, couple hundred parts with 7 holes each to deburr. Just hand held in the drillpress. Anti-ridgid steup!

 

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simplesteelcutter

Plastic

Joined

Apr 5, 2007

Location

Russell, PA

• Feb 27, 2009

• #9

Didn't mean to question your strategy. I'm usually only doing 1 or 2 of the same part at a time. If I had to do 700 holes at a time, then I'd be looking for alternatives. Like butchering up a good drill or buying a bigger countersink.

 

Super Dave

Cast Iron

Joined

May 8, 2004

Location

Sheboygan Falls, WI, USA

• Mar 1, 2009

• #10

Better still - find the shortest drill possible, no more than 3 or 4 times the diameter, use it first to spot the hole. Do this at about half or one forth your normal feed to get it started true.

I've already cut off several inches off of a drill to do this since it combines spotting and chamfering into one operation, one less tool.

Dave

 

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Dave A

Titanium

Joined

Jan 4, 2005

Location

Roseville, CA

• Mar 1, 2009

• #11

Very good topic - thanks for the idea.

 

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surplusjohn

Diamond

Joined

Apr 11, 2002

Location

Syracuse, NY USA

• Mar 1, 2009

• #12

I had a flow drill for melting and forming bosses in steel , works great. I tried the trilobe carbide bit as a deburing bit, it did a good job of burnishing down the hole's edge, probably not a cost effective use, but it worked.