[s10sakota]

All of the holes on these steel brackets have to be opened up just slightly to get the bolts through.

I ran a 1/4" drill bit through the holes and now they need deburred. How do I debur steel? I'd rather not use my good debur tool for this as I think the steel would dull it very quickly.

How did you guys clean up the holes on these pieces?

 

[Mel]

Lightly spin a larger drill bit by hand on each side of the hole.

 

[Ron B.]

I've been using the same deburring tool on both alum. and steel for two RV's now and they still work great.

 

[Dorfie]

Counter sinking steel

In the same context. Can you use your regular CS tool to CS steel? It became an issue with the steel hinges of the RV-10 doors when I installed cover plate using CS screws. I used a drill, but angle not the same. I was concerned to ruin my CS tool.
Johan

 

[Zero4Zulu]

In steel, turn the c'sink tool very slow. If you are doing a full c'sink for a flat head screw you could use a little cutting oil. After using the tool in steel you can carefully dress the cutting edge with a stone, only on the inside of the flute.

 

[Greg Arehart]

Lightly spin a larger drill bit by hand on each side of the hole.

I would use a step drill chucked in an electric screwdriver for this. Goes slow and won't catch the edge as easily as a twist drill.

 

[Smilin' Jack]

A uni bit drill is great and when you get to your Stainless steel items if you use turpentine it will lubricate great. I used This with a 2 inch hole saw to do my cabin heater and the hole saw went through like butter with hardly a burr left.
A machinist told me this.
Jack

 

[ROTARY7]

NOGA C20 Countersink (hand tool)

http://www.mscdirect.com/product/05752431

 

[FresnoR]

I used a cone shaped grinding stone on a drill and it worked great. Only a few dollars too.