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Post by Deleted on Jan 4, 2018 21:47:36 GMT -5
Happy New Year All, I have a new AR8 Pro with spindle and am interested to hear what your favorite bits are? Any recommendations including feeds n speeds would help greatly. I'm interested in 1/2 inch shank bits for clearing large pockets and also cutting through 3/4 inch ply. Thank you
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Post by stevem on Jan 4, 2018 22:44:05 GMT -5
If you're going to use 1/2" bits for hogging out larger areas, all you need is some spiral bits in up and down cut. I cut thru 3/4" ply all the time with a 1/4" shank and a 1/4" spiral bit all the time. using a 1/2" dia bit just chews up alot of wood. Last fall I watched someone at a Rockler store run a 1/2" dia spiral thru 3/4" plywood in 2 passes at 150 ipm. The machine never slowed down. That being said, 1/4" bits are the norm for almost all cutting.
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Post by scottbuehler01 on Jan 5, 2018 10:45:01 GMT -5
I used to have a big machine with 12 hp spindle and I used3/8" bits to cut through all my sheet good. It allowed for a fast speed rate with minimal chip and dust. I'm new to the smaller 3hp machines, so I am also curious to what you guys use.
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Post by redwood on Jan 7, 2018 12:38:58 GMT -5
Obviously, it really depends on what you are doing. I use almost exclusively 1/4" bits, a assortment of endmills, ballnose, and v-grooves. I make signs and furniture out of 1 1/2" thick material.
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Post by Deleted on Jan 10, 2018 18:48:21 GMT -5
Thank you for the feedback.
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Post by Deleted on Jan 13, 2018 12:09:14 GMT -5
Just because you can use a 1/2 bit doesn't mean you should. Sometimes you can get higher material removal rates with smaller bits, it's all about speeds and feeds. It also takes more HP to cut a 1/2" slot than a 1/4" one and you end up with more chips as well. Big commercial machines often use 3/8" or 1/4" as their primary bits because it's faster and lower cost too. There are times when 1/2" is appropriate or even larger or small bits, but choose the appropriate bit for the function.
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Post by mibrian on Jan 27, 2018 9:28:36 GMT -5
In the industry 3/8" shank is kind of a standard.
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