counter sinking screws

[rayclar]

I don't have kerosene, would diesel oil work the same sheild arc?

 

[GregbkH]

If it's a one time job just go buy an 82 degree bit from the hardware store. If you think you are going to be doing more of this type work, consider getting a decent set. Cost more. I have a set of 82" Uni-bits that work awesome but they were pretty spendy.

 

[Shield Arc]

Oh I don't know, never tried it. Might work, give it a try, can't see where it would hurt anything.

 

[Mark @ Everlast]

Whatever method, watch your eyes! Aluminum won't come out with a magnet at the eye doctor's. I guess if I fear anything when working, its getting a piece of aluminum in my eye.

 

[Bigkrank]

On of the few things besides cleaning decal glue that WD40 is actually good for is lube for machining aluminum.

 

[Shield Arc]

Whatever method, watch your eyes! Aluminum won't come out with a magnet at the eye doctor's. I guess if I fear anything when working, its getting a piece of aluminum in my eye.

Good point Mark. Have you ever used a match form the cardboard foldable book of matches to remove small pieces of steel from your eye?

 

[dstig1]

You'll shoot your eye out! :laughing:

 

[RobertBrown]

On of the few things besides cleaning decal glue that WD40 is actually good for is lube for machining aluminum.

beeswax works good too

 

[sparc]

My choice would be a weldon countersink from Weldon Tool.
There are others who seel this style countersink. Try Enco or
McMaster-Carr to name just two of them.

They will give you the cleanest countersink and work on wood equally well.
You should be able to find a set of 4 for less than $40


www.weldontool.com

http://www.weldontool.com/catalogs/weldon/Weldon1998-R.pdf

 

[varmint]

The Weldon countersink set is a great thing to have, but since we don't know just what angle the original poster needs, maybe he should match a countersink to the fastener before sinking a lot of money into something. I have always found that the single flute, high speed steel countersink, like Morse, work well in metal. Aluminum, as someone mentioned, draws heat away nicely, so other than chattering, it's easy to machine. Just take a fastener to your tool store, Harbour Freight or Sears or whereever, and match the angle to the countersink. Done.