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Old 01-25-2021, 03:50 AM
reals8gy reals8gy is offline
CAMaster Owner
Join Date: Sep 2020
Location: LaGrange, KY
Posts: 19

Originally Posted by Kyle Stapleton View Post
How are you holding this down?
I currently don't have vacuum, so the holes are drilled while the perimeter is either clamped or "through screwed." I look forward to the day of laying down the material and moving a valve handle.
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Old 01-25-2021, 09:25 AM
rcrawford rcrawford is offline
Cobra Owner
Join Date: Dec 2011
Location: Alberta
Posts: 2,493

Use a compression bit for both cuts. 1/4" works, but 3/8" is my favourite.

When cutting the 3/4" holes, use an inside profile cut with a spiral and an offset last pass (so it spirals down the profile just a little smaller than you need, and then gives one last profile cut around the edge to remove the little excess that was left). This give the fastest, cleanest holes.

I always find that upcut bits give me a rough top edge on MDF.
Russell Crawford
Cobra 408 ATC with recoil
Alberta, Canada
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