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Need Help boring Phonelic (WA Compact)1/20
Hey guys I could use some help.
took a project with 10,000 holes in 3/8" Wilsonart Compact laminate. Basically this stuff is a wilsonart laminate on the outside, but 3/8" thick with a phonelic core. I was able to cut it fine with the right bit (3 flute slow helix upcut), but I'm having a hell of a time getting the boring worked out.
I've tried 7500rpm and a 3 meter per minute feed. I've tried with a through bore v point bit (snapped bit on 2nd hole), and a brad point bit (took outside spurs clean off the bit on second hole).
I'm doing this on a weeke vantech nested router.
The holes are 7mm, with a counter sink to sink a 1/4" flat head machine screw.
Thanks for any insight.
Your best bet is to route the holes. Last time I machined that type of material, I used a 3/8" diameter diamond bit for the perimeter cuts and a solid carbide single O-flute bit for my 7 and 8mm holes. For the routed holes I used a helical path to cut all the way thru the material. Bit life was surprisingly good. Since you have to do a countersink, maybe you could follow up with a insert v-groove bit with the proper angle. Just bore on the previously routed holes and the tool should last long.
I would second that idea of routing not drilling. Specifically I usually use a ramped lead in which forces the tool to spiral down to the final depth.
Would also suggest O-Flute tooling
Couldn't recommend specific feeds at this point as I only use this material intermittently.
Thanks guys.....I was out on the shop floor trying to figure this out. As it turns out, the problem wasn't with boring....It was the countersink I had attached to the 7mm V bit. The chips would clog under it and not let the V bit do it's job.
The V bit seems to be running good at 7500 RPM, 3mpm feed and a slow fast slow through mode in woodwop. I'll have to do the countersink as a secondary operation.