On Nov 19, 4:21 pm, David Billington
wrote:
wrote:
I have an old cast iron table from a table saw. It has a small
rectangular hole in the center of the table that I want to enlarge for
a router. I thought of a metal blade and a jigsaw yet, that sounds
like it might not realistically work.

Looking for any suggestions..

Thank you,
Keith

A square file?. CI files really easily unless the edge is chilled, in
that case you might need to start with a TC grit file. This should not
take long unless the hole needs to be greatly enlarged.

Thanks,

I have to double the opening essentially making it fit a router
template. I'm not familiar with a TC grit file and I am assuming
this is a diamond hand file? Seems like that might take a while by
hand.

Keith