1/4” single flute end mills

Just spent 30 minutes googling 0.250 SingleFlute endmills. Lots of expensive ones couldn’t find anything cheap.
So…could someone point me to a source? Please?

A 1/4" 2 flute should have pretty big gullets, the only real reason for single flute is to increase that gullet size and support a higher RPM - are you having problems?

Drillmam1 on eBay has one for a decent price https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F152487090755

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I’m messing with some deep slots plus a few 3D profiling cuts that I’ve read can be accomplished with single flute endmills. A learning exercise at this point.

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Hmmm, thanks. Drillman1 is one of my favorites, I didn’t see the mill you referenced when I looked earlier today. It’s ordered now. Thanks!

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Just found these guys, never heard of ‘em ‘til today: http://www.2linc.com/endmills_downcut_1fl.htm

Found what I wanted plus some downcut single flutes that I think will work well in hardwoods. I’ll order a couple, see what happens.

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I have one of these:

Works fantastic on plywood, suspect it would do well in hardwood also. Not cheap per se’, but works really well for my uses.


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How does single straight flute compare to the 3 flute spiral (the classic #201) for cutting oak and maple? Or for softwood like pine? I would think you’d get cleaner cuts but you’d have to run them a much lower feed rate. ie, #201 at 18krpm with a fr of 90 in/min, single flute at 18krpm would need 30 in/min. Is my logic flawed in my thinking on that?


They also have down cut at the same price

$7 btw


I can’t say how they work on solid wood as I have only used mine to cut 3/4" maple plywood. I run it around 20,000-21,000 rpms at 100ipm with 50ipm plunge and 0.125" DOC and ramp in the cuts. I get good clean cuts that need very little sanding other than removing tabs.


I’ve been following your thread. Thanks for the link. Yet another source I’ve never heard of. Guess I need to rethink my search terms! And, it seems a huge source of other tools too.
Hmmmm, maybe because I’ve only ever purchased solid Carbide cutters. Never searched HSS. Live and learn.

I also splurged and bought a 12” aluminum cutting blade for my chop saw from Toolstoday. I’ve been using old, dull Carbide blades for cutting Ali but the cuts are pretty ugly and I’m running out of old blades anyway.

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