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Blind hole Tapping

Blobis

Plastic
Joined
Aug 15, 2017
Hello everyone.
I'm going to be blind hole tapping some C1018, making hole .202, using a WIDIA GTD 1/4-20 UNC H3, with a depth of 1", on a Okuma 4020 Mill, I've never had any luck with blind hole tapping, what do you recommend for speed and feed, any help would be great.
Thank you, Bob
 
Hello everyone.
I'm going to be blind hole tapping some C1018, making hole .202, using a WIDIA GTD 1/4-20 UNC H3, with a depth of 1", on a Okuma 4020 Mill, I've never had any luck with blind hole tapping, what do you recommend for speed and feed, any help would be great.
Thank you, Bob
Form tap everything, the end.

Seriously though, a spiral flute tap run it around 30sfm and it should do just fine.
 








 
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