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-   -   Hole deburring (https://vansairforce.net/community/showthread.php?t=194990)

JeremyL 05-03-2021 08:31 PM

Hole deburring
 
Im thinking about buying a couple EZ burrs. Does anyone have experience with these. Are they fantastic additions or could they cause an over deburring issue? The idea of cutting deburring in half is quite enticing.

Presmini 05-03-2021 08:34 PM

Definitely interested in this as well. Ive never heard of this..but whoa..those are cool.

xkape 05-03-2021 08:49 PM

Those look slick, I've never seen them before. But for $80 (on amazon) I don't know if it's worth the extra hassle over just getting a countersink bit chucked into a drill and giving every hole a quick blip of the trigger on both sides.

I feel like I'd treat this the way I do my pneumatic cleco tool. Thought it was a great idea and worth the money but then I just don't ever use it.

ScottK 05-03-2021 10:00 PM

I ran across a few YouTube videos of these (or tools like these) in action. They look...aggressive. It seems to me they're meant for working with considerably heavier and harder stuff than airplane aluminum. I think it's likely these would create overt chamfers or even enlarge the hole in thin sheet. But if you try, by all means, let us know how it works.

fixnflyguy 05-04-2021 05:14 AM

They have been around a while..but be careful!
 
I have used them for 40 years, and have them all the way up to 3/4". My day job is a structural specialist for heavy aircraft, and I spent a lot of time working with B737 thin skin failure issues. To the layman, de-burring is a magical novelty that yields a smooth beautifully produced hole, however in thin materials it can be problematic. Think of it this way..the skin/structure transfers load through the fastener into the adjacent structure aka, "bearing strength". When holes are de-burred, the area of the bearing surface is reduced and the condition of knife edging is increased, resulting in fastener movement/failure. In reality, we only try and remove the burr caused by drilling that interferes with stck-up. I have seen folks get really overboard and end up with a hole that has a small countersink on both sides. Those de-burr tools are great for in situ work where access is limited. I actually prefer to de-burr with scotchbrite, a 6 flute countersink with my fingers, or a thumb vixen file on thin stuff.

Reflex 05-04-2021 05:56 AM

Not the EZ Burr brand, but I bought a set of these: https://www.yardstore.com/sheet-meta...in-and-out/new.

I don't use them often, but when they're needed, nothing else will do. Yes, they can be a bit aggressive but so can a basic deburring tool. Like any tool in your shop, learn what they will do and use appropriately.

Ironflight 05-04-2021 08:02 AM

If your goal is to sped things up, then a single-hole demurring bit (Cleavaland has them) stuck in a cheap electric screwdriver is a GREAT way to do a lot of holes in a short time in a non-overly-aggressive manner. If I need to do the back side of a hole, I like the Shaviv “S”-shaped bits - that tool comes out of the drawer occasionally, but when it’s needed, its really needed.There used to be lots of posts here about EZ-burs...mostly about how folks had broken them. You find lots of the larger sizes for sale in the flymarts at the big shows, built the#30 and #40 are rare finds - my guess is because the small ones break before they wear out.

JeremyL 05-04-2021 08:57 AM

Quote:

Originally Posted by Ironflight (Post 1523052)
If your goal is to sped things up, then a single-hole demurring bit (Cleavaland has them) stuck in a cheap electric screwdriver is a GREAT way to do a lot of holes in a short time in a non-overly-aggressive manner. If I need to do the back side of a hole, I like the Shaviv S-shaped bits - that tool comes out of the drawer occasionally, but when its needed, its really needed.There used to be lots of pots here about EZ-burs...mostly about how folks had broken them. You find lots of the larger sizes for sale in the flymarts at the big shows, built the#30 and #40 are rare finds - my guess is because the small ones break before they wear out.

Thanks for the conversation guys, I do have and currently use the single hole and love it. Just curious if anyone has had plenty of build time with these on all thicknesses. I like to be on the cutting edge of technology (pun) haha. Spruce has several sizes of ez burr including the 30&40.

Bavafa 05-04-2021 01:46 PM

I do have a nearly full set and use them often. They are especially useful in the area that you may have limited access to the other side.

9GT 05-08-2021 03:57 PM

3 Attachment(s)
I have these for deburring holes. 1/4 shank bits fit the hex receptacle nicely and I epoxy the bit in place.


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