Dewalt has launched new 5-flute 82° countersink drill bits for use in metal, wood, and plastic materials.
Dewalt says the 5-flute design avoids excessive vibration and provides for smooth drilling.
They all have round shanks and are said to be suitable for handheld and stationary drills.
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There will be a 5pc set, and the drill bits will also be available individually.
Sizes include 1/4″. 3/8″, 1/2″, 5/8″, and 3/4″. Here are the model numbers:
- 1/4″: DWAMDB16CS
- 3/8″: DWAMDB24CS
- 1/2″: DWAMDB32CS
- 5/8″: DWAMDB40CS
- 3/4″: DWAMDB48CS
- 5pc set with all sizes: DWAMDB5SETCS
At the time of this posting, Amazon has the 5pc set at $25, and Acme Tools at $50. To give you an idea of individual bit pricing, Amazon has the 1/2″ bit for $13, and Acme Tools has it for $17.
COO: Made in China
Discussion
It’s a little surprising that Dewalt would launch countersink drill bits, but I’ve seen similar from construction tool brands before – my first multi-flute countersink was Bosch-branded.
Maybe there’s a deeper takeaway here, but I’m not seeing it.
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I’m not much a fan of multi-flute countersinks like this; I prefer the zero-flute designs. Maybe it’s poor technique, but they always seem to chatter on me, leaving poor surfaces. I’ve seen others complain about similar issues before, but I’ve always assumed they could have poor drilling technique too.
Alexk
I bought a very cheap set from Harbor Freight years ago. Think they were less than $5. They are adequate for wood.
fred
I too find chatter to be an issue with this design. While my go to countersinks are zero-flute (with and without pilots) from Weldon – Amazon sell this set of zero flute that they say are their choice for a fraction of the cost:
https://www.amazon.com/OCGIG-Countersink-Chamfer-Titanium-Deburring/dp/B07P543FGB
Stuart
I have a deep aversion to no-name power tool accessories. I try to stick with name brands – usually from industrial suppliers for things like this, as the quality tends to be consistent. With no-name Amazon brands, you never know what you’re getting.
MM
Agreed. In my experience running a machine shop the difference in performance between name brand and generic tooling is massive. I avoid mystery-name countersinks, drill bits, end mills, plain milling cutters, etc.
I prefer single or zero-flute countersinks. I think the reason why the multi-flute ones are so common at hardware & big box stores stores is because they are robust and difficult to damage. Single-flute and zero-flute countersinks are much more easily dulled by careless use.
UberChemist
I keep both on hand, but the zero-flutes get the lion’s share of the work. The multi-flutes do chatter like crazy (even on a drill press), but they do bore out much faster. For larger screw sizes, I’ll get close with the multi-flute then finish with the zero-flute. I’ll burn up a zero-flute trying to hog out a big hole by itself. I’m mostly cutting 316SS, I think most materials are more forgiving. I’ve been eyeballing a milling machine for years, and I think that’s the proper machine for multi-flute countersinks. I just don’t have room
David A.
I never knew they made single flute countersinks! I have always used the multi-flute ones! I am not a wood craftsman but occasionally build a project where these provide a nice touch. I have never experienced the vibration mentioned but again I don’t use all types of wood but usually pine in my projects.
Grady
I was al over this until I saw the coo. I’ve used multi-lute countersinks when I was a machinist. Yes, they do take careful application.
Jager
I’d imagine it’s from the same supplier SB&D uses for their irwin countersink bits and it was just a cheap way to add to the yellow offerings by having some of them come out of the factory in yellow packaging.