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Old 10-29-2020, 12:56 PM
jdonaldson jdonaldson is offline
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Default Cutting 1/4 Ply

I have a job cutting out 50 pieces from 1/4 Alder plywood, I need to
to have clean edges since the customer is not planning on doing any
finishing other than spraying a topcoat on them.

Any suggestions regarding bits, RPM, feeds would be greatly appreciated.
I know that compression bits are recommended for plywood but, I think
1/4" is probably to thin so maybe a down spiral

Thanks

John
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Old 10-29-2020, 01:46 PM
Logan Y Logan Y is offline
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I'm cutting a bunch of 1/2" finished ply right now with an 1/8" downcut at 14k and 200 ipm. I cut with a finish pass of .005 and haven't had any tear out issues. I didn't have an 1/8" compression on hand and a 1/4" was too big for big for the detail I needed.
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  #3  
Old 10-29-2020, 02:42 PM
guitarwes guitarwes is offline
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1/8" downcut, 1 pass leaving .03 in a CLIMB cut direction using 12k rpm 120ipm. (carbidetoolsource.com, you can get like 5 of them for $26. I get the .75" LOC so I can cut 3/4" plywood also).
Then a single cut thru pass with a 1/8" compression bit (Holzy from Amazon works great) in a CONVENTIONAL cut direction.
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Last edited by guitarwes; 10-29-2020 at 02:45 PM.
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Old 10-30-2020, 09:14 AM
Jim Becker Jim Becker is offline
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Good advice on the tooling already.

I'm going to add that your customer needs to understand that the edges right off the tool are not going to be "perfect" no matter how you cut them. There will still be some tool marks. Since this material is so thin, it will be less noticable, but be sure you set expectations. Unsanded edges where the edge hasn't been "broken" with fine abrasives can also be quite sharp and unbroken edges don't cope with finishes as well, either.
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  #5  
Old 10-30-2020, 12:39 PM
jdonaldson jdonaldson is offline
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Thanks for all the help
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