Blooming stainless, grumble moan complain

[Robin Hewitt]

What speed were you drilling? Rule for stainless is low speed high feed.

I know what went wrong, I pushed too hard at break through and the metal extruded in to a collar on the inside of the tube. This collar instantly hardened undersize and started deforming to match the bit as it went round. Less than a second later the bit was red hot and deforming to match the collar

I got my 4 holes drilled this morning nil problemo. Should have binned the rest of the bar but didn't :D

[Smiler]

I know what went wrong, I pushed too hard at break through and the metal extruded in to a collar on the inside of the tube. This collar instantly hardened undersize and started deforming to match the bit as it went round. Less than a second later the bit was red hot and deforming to match the collar

I got my 4 holes drilled this morning nil problemo. Should have binned the rest of the bar but didn't :D

Stainless is an absolute pig! It's so temptimg sometimes when you are microns away from breaking through and the swarf turns dark to push just that bit harder.......next thing you know....home made step drill:D

Wasn't trying to teach you to suck eggs BTW.

Snowing buckets here at the 'mo :(

Take care all, Jeff.