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I've been using ENCO solid carbide double edge spiral upcut bits. I make 1/4" deep passes while cutting the outline of MDO. The bits are sharp and not burning the wood. After a 10 or 15' they snap. On my old router I would always use 1/8 bits now I'm even breaking 1/4" bits.
I can do ok at 25" per min. but I would like to run a little faster.
Have you tried a 2-Flute wood rout up spiral or a 2-Flute compression bit . I use them both and they work well. Compression bits keep it from chipping on the front and back.These bits I run 1/2" deep and i start at 100 ipm
The Rosberg MDO seems to be much harder than it used to be.
What brand bit are you using ? The Enco bits are designed for metal cutting but they have always worked well in the past and they cost about 1/3 of wood router bits.
I will buy more expensive bits if they will hold up better.
I have not done much routing with MDO yet but I have routed 3/4 plywood set the machine at 19,000 rpm and 300 inch/min 1/4" per pass didn't have any problems. Using Gerber bits just because I got a quite a few when I bought the router 1/4" bit two flute spiral. You should be able to run a quite a bit faster I would think. :signs101:
Mike, I have not routed much MDO or plywood wasn't real sure on what I should use for settings on the plywood had to route 20 sheets for a guy. Some people told me they run more passes faster I don't know still learning. I have some other bits to try when the Gerber ones are used up like I mentioned I got a quite a few bits when I got the router.
Ernie, just a thought is the feed on the router actually feeding at the 25 ipm that you have set or could it be feeding faster for some reason?
Ernie, that is what I was wondering if you were moving at 25 ipm or if you were actually moving faster have you timed it to see if it is accurate?
Onsrud are the bits that I was going to try when the Gerber bits are gone let me know how you make out.
I am joining the thread late but I will tell you how i cut mdo.
I use a 1/8 or 1/4 up cut sprial bit. with a 150 ipm feed rate and a 80 imp plunge.I also only use 1/4 depth per pass.I have found that Routers and cncs using these small bits definitly have limits.I have broke alot of bits trying to speed up the project and ended up having it taking longer because of broken bits.most of the cnc operators that I talk to have true cncs and bit shaft dia. start at 3/8 and go all the way to 3/4".
I will admit bit quality does make a differance.
I have had ok luck with gerber bits with slow feed rates.
I mostly use frued bits.The entire bit must be solid carbide,it cost a little more but is well worth it.
I also got a feed rate chart when i puchased the table that gives feed rates for various materials.I will try to dig it up tomorrow.
I also sometimes go into the templates in artpath to get feed rates for certain materials.
my house remodel is almost complete,I look forward to returning to the site on a regular basis again.:signs101: