Broken #21 Drill Bit in mill part.

I don't break drill bits anymore. But, I have been known to use "concrete etcher" in a hole or two.:whistle:
 
Froneck said:
What they are suggesting is putting an acid in the hole. A base (alkaline) is opposite of an acid both can erode metal. I had a job that required drilling hundreds of 5/32 holes 1" deep in SS and sometimes Titanium. I told my guy if they break a drill don't try to remove it. I will get it out. Never hit it with a punch or hammer because it made it harder to remove. One guy broke the 5/32 drill in titanium and hit it. That stopped any way of cleaning out the chips and getting the drill out as I've done many times.
Titanium is tough stuff and not affected by most acid. Someone told me to try putting acid in the hole to dissolve the drill. I purchased Fuming Nitric acid ( high concentrates fume like it's smoking) Put in the hole and it bubble and smoked, dumped it added more I dumped and Added fresh acid all week and it did nothing! Black liquid would pour out of the hole but drill would not come out. Eventually took it a friend that had a tap burner!!! What kind of machine is this support on?
Click to expand...

It is a K & T Milawkee 2CH same support as a 2H

Paul
 
Froneck said:
If your interested I have quite a few 2H supports. I don't have the heavy outer support with the studs. I do have the inner style with out the bronze bearing, Key is in the bore though. Cheap $25 plus shipping $12 Flat Rate Priority. I also have complete "A" style if your interested. Might find one without the oil level cover and oil level plate for less.

Frank
Click to expand...


Frank
The A style is what I'm working and it needs to have the level plate and cover. Send me a pm with price and shipping.

paul
 
I would try a carbide ballnose with compressed air on it the entire time, no coolant, no oil or such.
run the endmill rpm fast, feed light, and retract often to get chips out... make sure the chips arent dropping and packing in the hole as you plunge..
 
brucer said:
I would try a carbide ballnose with compressed air on it the entire time, no coolant, no oil or such.
run the endmill rpm fast, feed light, and retract often to get chips out... make sure the chips arent dropping and packing in the hole as you plunge..
Click to expand...


I'll have to get one smaller all I have is 1/4"

Paul
 
How deep is it drilled? I believe I have some 3/32" 4 flute coated ball nose end mills. They're stubby though.
 
You must log in or register to reply here.
Back
Top