MiniMax CU300 Smart mortiser attachment

[Rick Potter]

Can anyone tell me what the RPM is on the mortiser attachment for my MiniMax combo machine?

Thanks

[Kevin Jenness]

Whatever the cutterhead rpm is, probably in the 5k range.

[Erik Loza]

Yeah, 5K-ish is pretty standard on any of these.

Erik

[Rick Potter]

Thank you for the info.

I wanted to compare it to the Laguna slot mortiser I have which runs at 3,200 RPM (per Laguna). Sounds like 5K would possibly work better with upcut router bits I have.

[Phil Gaudio]

I've used upcut carbide spiral router bits and birdsmouth bits on a SCM/Minimax mortiser and I've decided that the birdsmouth bits do a better job: cleaner moritse walls and less tendency to pull the bit into the cut. My $.02.

[Rick Potter]

Thanks Phil.

I have a set of birdsmouth bits from Laguna. My use is mostly with 1/4", and sometimes 3/8" mortises, and I find the 1/4" birdsmouth flexes too much, causing vibration. That is why I have been using router bits.

[Phil Gaudio]

I have found that vibration becomes an issue with either type of bit if I am too aggressive on the depth of cut. If I am making a 1" deep mortise, I will plunge the bit and sweep across maybe 8 to 10 times before I get to the bottom of the excavation.

[Phil Gaudio]

As luck would have it, I ended up cutting some mortises this AM and thought I would post a pic purely for entertainment value: these were made with a 3/8" birdsmouth bit (Klein brand I believe). By the way, when I mentioned sweeping 8 to 10 times (above), I should have said "16 to 20 times".

[Erik Loza]

Phil, are you talking about the same Klein I am thinking of (electrical lineman-type tools)? Reason is, I'm always looking for a good source on IMPERIAL birdsmouth bits. Thanks,

Erik

[Phil Gaudio]

Erik: I believe its Systemi Klein out of Germany. Phil



Phil, are you talking about the same Klein I am thinking of (electrical lineman-type tools)? Reason is, I'm always looking for a good source on IMPERIAL birdsmouth bits. Thanks,

Erik

[Erik Loza]

Gotcha, Phil. Thanks!

Erik

[Robert LaPlaca]

Haven’t bought from this vendor but it looks like they have imperial bird’s mouth, https://www.icscuttingtools.com/new-products/mortise-bits.htm.

I find that lots of sweeping light passes do the best job with the birds mouths..

[Erik Loza]

Haven’t bought from this vendor but it looks like they have imperial bird’s mouth, https://www.icscuttingtools.com/new-products/mortise-bits.htm.

THANK YOU, Robert!

Erik