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Machining (drilling) Hastelloy C276

Sent to General Experts July 3 2006 at 9:09 AM
   

We are looking for the best feeds and speeds on a .633" dia carbide drill for drilling Hastelloy C276, same question also for Kobalt drills.
thank you,
clem
L.H. Corp.
Dublin, Virginia

 

Customer (name blocked for privacy)
Status:  Closed   Value: $15
Reply
July 5 2006 at 3:01 AM (1 day and 17 hours later)
         
Relist: No answer yet.
currently we are trying to use a carbide drill; .633" dia and have used 0.003" per revolution and 275 rpm; there must be a better setting because the drill lasted only half a part.

I have not received an answer to the original question of best feeds and speeds and type of drill to use.

Thanks for trying to get an answer quickly.
greetings,
Clem
Customer (name blocked for privacy)
Answer
July 5 2006 at 6:42 AM (3 hours and 40 minutes and 43 seconds later)
         
ACCEPTEDCheck Mark
Hello,

After consulting with another expert with 40+ years experience as a machinist his recommendation would be running the part at a .006" feed rate, 500 - 550 RPM, and make sure you flood the part with coolant. Carbide is a very tough material and is designed to run at higher speeds than other bits. Also it has to stay cool and you have to make sure that the scraps are being flushed away from the part being drilled.

Thank You,

Michael D.

Edited by MichaelD159 on July 5 2006 at 6:51 AM

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