Best way to debur?

[m32825]

Need some really short brass clevis pins for a project, but can't find any, so I'm thinking of making my own. There are some solid brass rivets that are perfect, except for not having a a hole. These are 3/16" diameter rivets, with a 1/4" length, I want to drill a 3/32" hole in the middle of the shaft. I have some ideas for making a fixture to ease the alignment, so I think I can get repeatable holes, but I have no experience with deburring.

I'm going to tie a cord through the hole, and I don't want sharp edges that will fray/cut. Having the exact same hole profile each time is not critical, just need smooth edges. I'll need to do a couple hundred of these, so I'm looking for something that's quick. For this situation what's the best way to deburr the holes?

-- Carl

[cnczoner]

Not sure of your exact specs, but when I think of clevis, I think of model airplanes and hobby shops. Perhaps you might find something workable there. Otherwise, if you roll your own, perhaps you can coat the hole with silicone/epoxy/plastic-dip/etc instead of deburring to eliminate the sharp edges.

[m32825]

Good suggestions. I tried drilling a few rivets and decided that it was fine for a handful of fasteners, but no way for 200. Hobby supply shops didn't yield anything useful but an aviation supply house for home-built kit planes did, so I'm set, thanks!

-- Carl

[NutmegTech]

How about using a countersink to remove the burr? Depnding on how your drilling fixture is made, you can use it to hold the rivet for this operation.

Brian

[Big Daddy]

Pizza cutters… Buy a pak of carbide bladed pizza cutters and just spin on the edge of the holes by hand. They’ll give a nice finish on the radiuses. You can find them at any machine tool supplier about 50/60 bucks. If you only have a couple hundred it will take about 2 to 3 hours.

[millman52]

a really small center drill in a cordless drill would be my wheapon of choice. A center drill will do a very nice job of smoothing out the edges.

Neil