I am having trouble on this 420 material. First of all I didn't have a carbide drill. Finished hole is like .124" I am using an hhs #3 center drill then a .104 drill hhs then a carbide stabber with a radius that is like .117" in diamter. I might of had some other issues going on besides feeds and speeds but when I got to the stabber and it broke. I am not at work right now. But if you have experience with situations like this it would be great. I am going like .300 to .400 deep. For the carbide stabber what rpm would you use and feed and would you g81 it or peck it and would you use full retract. The hole is being spotted before the drill .
What rpm would you use for the HHS Drill that is .104 in diameter? on my FS wizard app its gives me two options .
(moderately difficult stainless steels ) 135-325 HB)
RPM 1030 F1.43
(free cutting stainless steels (135-375HB)
RPM 2354 F 3.6
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I think originally the RPM in the program was around 3 or 4 thousand something with a feed of 8.
Hopefully I might get a carbide drill but dont want it to break. I don't have extra stock to have drills breaking. Even though the part is just a 1" square block basically. If you have recommendations for rpm and feed of a .104 carbide drill as well that would be greatly appreciated.
What rpm would you use for the HHS Drill that is .104 in diameter? on my FS wizard app its gives me two options .
(moderately difficult stainless steels ) 135-325 HB)
RPM 1030 F1.43
(free cutting stainless steels (135-375HB)
RPM 2354 F 3.6
------
I think originally the RPM in the program was around 3 or 4 thousand something with a feed of 8.
Hopefully I might get a carbide drill but dont want it to break. I don't have extra stock to have drills breaking. Even though the part is just a 1" square block basically. If you have recommendations for rpm and feed of a .104 carbide drill as well that would be greatly appreciated.