Mortising bit for flattening

1

Hello I’m brand new to CNC Routing.
Just setup my 1F Wood worker and wanted to know if there’s anything wrong with surfacing my spoil board with a 3/4” Straight cut Mortising bit with my Makita router? Other than it will take longer than say a 1-1/4” surfacing bit.
I ask for 2 reasons, 1 I’ve read where some others on this forum have smoked their routers using the 1-1/4” surfacing bits with the Makita routers and 2, I live in Alaska and it’s difficult to find anything locally available other than the mortising bits.
Thanks in advance for any help you may give.

2

It is slow, but this is what I used as well for my journeyman x50. It took a long time, but I was in no hurry. I just worked on other projects in the shop while this made a lot of dust. If you have a MDF spoilboard, then just make sure you are protecting your lungs This stuff makes so much fine dust particles that irritate your lungs.

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3

Smoking the router surfacing is not likely with mdf but rather folks using them to flatten slabs of hardwood.

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4

I use a 1 1/4 surfacing bit but even on just MDF that router body gets really hot after a while. If I’m flattening I definitely keep an eye on it (but I do use it, including for some flattening, mostly just smaller flattening jobs)

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5

Thanks everyone for your advice and comments, I value both!
Looks like I’ll be surfacing my 1F spoil board today with my 3/4” mortising bit…:+1:

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6

Can I ask what speed and feed you were running the 3/4” mortising straight cut bit to surface your waste board?
My feeds are defaulting to 40ipm taking 1.5 hours, I’d think I could bump those up a little…?

7

I think at the time I was running pretty slow… 50ipm probably. Depending on the depth of your cut you can likely run 70-80.