drilling and deburring

[noema]

Just wanted to drop a few quick tips here.

Drilling

I found that the springy dampeners (the ones that slide onto the drill bit) are inconvenient and simply using a longer drill bit (6") works well for protecting the material from drill impact.

Deburring

Getting to places with the deburring bit is sometimes difficult. Eventually I came up with these contraptions to get to the hard places. There are also reverse deburring bits which might work better for some situation but they tend to be extra pricy.

1) Deburring bit on a piece of pitot-static tubing, the stiff kind

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2) A grinder bit on a piece of pitot-static tubing (also works in a drill chuck)

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3) A ball diamond grinder bit and a steady hand

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[DBeaulieu]

Clever! Seems like an obvious technique now that you have pointed it out!

[noema]

More hacks:

The next one I have seen someone do from this forum. Unfortunately I forgot who. What I think I have added it that you can couple the deburring bit to a standard AN3 bolt with a standard nut. This is useful whenever you can add a hole (either by choice or design) in the opposite material.


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This one is a quick an cheap way of transferring hole patterns on the edge of material. Works surprisingly well. Simply create little strips of tape with a hole punched at the end. Cover 3/4 with opposing tape. Then align it with the hole, fold it back position piece that needs a matching hole, flop the tape back on and mark the hole.

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[alaskabearhawk]

That might be me: https://www.youtube.com/watch?v=C7nW6E6gL0I

[noema]

yes! that video was helpful to get my struts done! Thank you.

[Chewie]

The tape is a paper version of a hole duplicator. I used this technique as well, when I needed to flip my inboard aileron pocket ribs around which were already drilled. Even on a curved surface I was surprised how well it worked.

[noema]

I figured, it works too well that it isn't a thing already