In search of the perfect sheet metal concentric drilled hole
In search of the perfect sheet metal concentric drilled hole
In search of the perfect sheet metal concentric step drilled hole. I have found that it is not easy to drill a perfectly concentric hole for step up hole sizes. a drill flute can catch on one side and dig in and then the hole is not concentric. I have found that high drill speed and a light pressure seems to work best along with a small incremental step drill to the hold center position. I am trying the cobalt alloy vs HSS step drill to see if there is any difference. Perhaps the cobalt alloy Unibit will hold the edge longer.
RV9A, Superior O-320, WW 200RV prop, Slick mags, CHT 330F, EGT 1300F, B&C, 1400+ hours
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Freedom and Democracy are all that really matter.
Ride a bike, unlock the world.
https://www.rvplasticparts.com/
Re: In search of the perfect sheet metal concentric drilled hole
this guy says the Temo step drill is the best performer.
Best Step Bit I’ve Ever Tested Destroys $123 Snap On Blue Point!
https://youtu.be/zjtSdJsC4aM?si=5aKvcYLPRv3bg1oW
case of 6 for $100, cobalt
https://www.amazon.com/TEMO-Cobalt-Spir ... 101&sr=1-8
Best Step Bit I’ve Ever Tested Destroys $123 Snap On Blue Point!
https://youtu.be/zjtSdJsC4aM?si=5aKvcYLPRv3bg1oW
case of 6 for $100, cobalt
https://www.amazon.com/TEMO-Cobalt-Spir ... 101&sr=1-8
RV9A, Superior O-320, WW 200RV prop, Slick mags, CHT 330F, EGT 1300F, B&C, 1400+ hours
Freedom and Democracy are all that really matter.
Ride a bike, unlock the world.
https://www.rvplasticparts.com/
Freedom and Democracy are all that really matter.
Ride a bike, unlock the world.
https://www.rvplasticparts.com/