VAF Forums

VAF Forums (https://vansairforce.net/community/index.php)
-   Tools (https://vansairforce.net/community/forumdisplay.php?f=53)
-   -   Hole deburring (https://vansairforce.net/community/showthread.php?t=194990)

wirejock 05-08-2021 04:46 PM

Duburing party
 
Deburr Party is sort of a joke. Difficult to control a bunch of folks. However, I did have a dear friend who enjoyed helping. He actually came back!
Sadly he moved away. I miss my building buddy.
We had a few sessions over the course of fhe Wings. Deburring was fun.
We joked and talked. Adult beverages after.
I was very strict at first. Just a turn or two. Check. If it needs more, another turn.
In very short time, he was a pro. Just the burr removed. No chamfer or countersink.
Just saying. Life is short. Make friends.

RV6_flyer 05-08-2021 07:34 PM

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 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.

I am one of the guys that has had several #30 and #40 EZ-bur tools. They are expensive and break. The blade is supposed to be replaceable but the new tool blade does not work in the old tools and the blade for the old tool is not available. Have been unable to get a new blade installed in one of the new tools after it broke. When they work, they are fast. Problem is, they break, and require repair. The time spent fixing them and deburring with them takes more time than just using using one of the Cleaveland tools in a cheap electric screwdriver.

David Paule 05-08-2021 07:51 PM

A fast way to deburr skin holes, or holes an any flat part, is to lay a fine file flat on the surface and slide it across the row of holes, once on each side. If necessary, a reamer will remove any burr inside the hole.

Dave

JeremyL 05-09-2021 09:36 AM

Some great conversation and points being made here. I do have the single hole in an electric screw driver from cleavland, it works great, it’s just a total pain to get the inside of a rib, etc. I just ordered a 3/32 ez burr from ACS. So I will report back once that gets in and I get some time with it. There are pros and cons to everything….

HAL Pilot 05-09-2021 11:07 AM

The trick with the ez burr is to adjust the "bite" on some scrap first. Once your happy with a light bite go at it. It makes quick work of large pieces. After you might have to follow up a few stubborn holes with manual tool or an additional pass w the ez burr.

JeremyL 05-09-2021 07:10 PM

Quote:

Originally Posted by HAL Pilot (Post 1524330)
The trick with the ez burr is to adjust the "bite" on some scrap first. Once your happy with a light bite go at it. It makes quick work of large pieces. After you might have to follow up a few stubborn holes with manual tool or an additional pass w the ez burr.

Thank you for the heads up.

skybolt31 05-09-2021 08:26 PM

Quote:

Originally Posted by fixnflyguy (Post 1523009)
or a thumb vixen file on thin stuff.

What is a thumb vixen file?

fixnflyguy 05-10-2021 08:28 AM

Thumb Vixen
 
I don't have picture of it with me, but its a tiny vixen file about an inch long with a little curved wood handle that you pretty much push along with your thumb or finger. Got mine from a Boeing surplus store years ago. The Yard Store sells a palm version about 3" long. The vixen shaves off the burr cleanly..but you risk slightly scratching alclad. Not a worry if priming/painting.

JeremyL 05-19-2021 09:03 AM

Mixed feelings….
 
So I’ve used it and I have mixed feelings with it. Some holes it works ok on and other holes it won’t remove a burr or it chamfers the back side of the hole too much and the front ok. Im not too happy with the chamfer it creates in order to adequately remove burrs. So I’ve been trying and using the “larger drill bit method” and the single hole duburr tool. The ezburr is and will continue to be amazing for impossible to reach areas. As they say….. YMMV

Vfr1200 05-21-2021 07:01 PM

Great info
 
Quote:

Originally Posted by fixnflyguy (Post 1523009)
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.

I have the Ezburr tools also ,,

I have often thought about the tool taking to much material out but as a new builder just used what was easy , I just hit the thin material quick and light , will try the scotchbrite method
I use a under sized bite for drilling then reamer bits for final size and holes are nice and tight sometimes when i deburr it opens holes to much ! Also use the reamer for match drilling


All times are GMT -6. The time now is 05:53 AM.