"Andy Dingley" wrote in message
...
On 18 July, 22:06, "Rick Hughes"
wrote:
Have to tap in some M6 threads into blind holes in Stainless Steel.

Stainless? Buy some real cutting compound - RTD etc. Try Tilgear for
a supplier.

I would second that.

And as they a Blind Holes, here is a little Tip.

Before you start tapping push some Wax, or Putty, or Plasticine or Playdoh
into the hole, then as you tap, the swarf gets pushed up out of the way.

You can buy this a proper tapping sticks.