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Post by Barry K on Feb 18, 2020 14:52:53 GMT -5
I want to drill multiple 3/8 holes for a new project with my AR8 Pro . What is the best bit to use to drill 25 holes 3/4 in deep
Thank you in advance for your comments
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Post by stevem on Feb 18, 2020 16:28:46 GMT -5
You could use either a 1/8th or 1/4 upcut end mill and use a pocket toolpath. With a 3/4" depth I would take 4-6 passes at 14,000 rpm and 125 ipm. The 4-6 passes would depend on which bit you use. Don't use a down cut unless you want to burn things up!
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Post by Gary Campbell on Feb 18, 2020 17:18:06 GMT -5
I would use a 1/4" bit with an inside profile, spiral ramped. About 10 times faster and cleaner than multiple level pocket cutting
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Post by Barry K on Feb 24, 2020 10:19:46 GMT -5
Gary How can I use a 1/4 in bit . The hole I am trying to drill is 3/8 In ?
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Post by stevem on Feb 24, 2020 11:23:06 GMT -5
3/8" is larger than 1/4", so just use a pocket toolpath with the 1/4" bit. Like I said before, you can either use a 1/8" or 1/4" upcut bit. The 1/4" will take as long as the 1/8".
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Post by damonlayne on Feb 24, 2020 12:54:41 GMT -5
Why not use a 3/8" drill bit. Drilling Toolpath. Use Peck Drilling.
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Post by Barry K on Feb 24, 2020 16:32:04 GMT -5
I appreciate the suggestions . Thanks to all
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Post by Barry K on Feb 24, 2020 16:32:26 GMT -5
I appreciate the suggestions . Thanks to all
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johnb
Full Member
New owner @ March 2019, AR16 Elite, Aspire, 4th Axis & Laser
Posts: 326
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Post by johnb on Feb 28, 2020 20:25:15 GMT -5
Listen to Gary Campbell. He knows this stuff.
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Drilling
Mar 1, 2020 1:30:46 GMT -5
via mobile
Post by vintage on Mar 1, 2020 1:30:46 GMT -5
I would use a 1/4" bit with an inside profile, spiral ramped. About 10 times faster and cleaner than multiple level pocket cutting
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Drilling
Mar 1, 2020 1:32:55 GMT -5
via mobile
Post by vintage on Mar 1, 2020 1:32:55 GMT -5
I would use a 1/4" bit with an inside profile, spiral ramped. About 10 times faster and cleaner than multiple level pocket cutting Thanks for that Gary. I'd never come up with a satisfactory method. It's impressive! 👍
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