On 9/28/2012 9:37 AM, Pete C. wrote:

Tom Gardner wrote:

I need to deburr the inside of a 1/2" hole in a 1/8" AL "C" channel.
The hole is in the center of one leg with a 1/4" hole in the center of
the other leg. The channel is 1-1/4" Deburring the inside of the 1/4"
hole is easy.

If the volume was high enough, I would punch both holes but...

I would thing hitting it from the side with a small sanding drum or
stone on a die grinder would do the job.


Yea, the HARD way!