Which downcut bit should I buy?

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Caesar S
Posts: 197
Joined: Mon Sep 29, 2014 7:19 pm
Location: Seattle, WA

Which downcut bit should I buy?

Post by Caesar S » Mon Aug 17, 2015 6:56 pm

Hi,

I'm wanting to work on:
- Plywood
- Solid Birch, Maple, Redwood, Cherry

Thickness to about 1/2", though 1" would provide more flexibility in creating notch and fits.

Yes, I've search for "downcut" but haven't found quite what I'm looking for.

Thank you, Caesar.

Gadgetman!
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Location: Norway
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Re: Which downcut bit should I buy?

Post by Gadgetman! » Mon Aug 17, 2015 7:26 pm

You'll probably find that most 1/8" endmills are too short to cut 1/2" or thicker material.
(Normal 1/8" endmills cut about 12mm deep, slightly less than 1/2". They're also available in versions that can cut 17mm or 22mm, but the deeper they can cut the more stiffness they lose, and both cutting speed and accuracy quickly disappears. Not that I've seen 1/8" downcut endmills that can cut deeper than 12mm... )
I'd take a long, hard look at 3/16" or even 1/4" endmills.
Or 4 or 6mm endmills if you can use Metric endmills.
Weird guy...
Shapeoko 2014F: 1000mm X/Y, 300W Quiet Cut spindle, Arduino Uno/G-shield and GRBL 0.9i
15x30 drag chains, custom spindle mount, 9mm belts, 8mm endplates, 6mm motor plates.

Caesar S
Posts: 197
Joined: Mon Sep 29, 2014 7:19 pm
Location: Seattle, WA

Re: Which downcut bit should I buy?

Post by Caesar S » Fri Aug 21, 2015 7:08 pm

I was hoping I'd get a specific brand model where to buy information :)

Anybody have info?

Thank you, Caesar.

TomDChi
Posts: 184
Joined: Wed Mar 18, 2015 2:36 pm

Re: Which downcut bit should I buy?

Post by TomDChi » Wed Aug 26, 2015 12:45 am

I just got an Onsrud #57-240 through Amazon. It's a wood-specific downcut, 2 flute, 1/8" diameter and 1/2" long cutting, 1/4" shank (they also make the #57-244 which is the same thing with a 1/8" shank.) I've used it on MDF and it's been spectacular. I still need to try it on real wood. The 57-200 series is various sizes of downcut for wood. I'm definitely getting more.

Searching for "Onsrud" and a model number will turn up a bunch of places to buy from.

Caesar S
Posts: 197
Joined: Mon Sep 29, 2014 7:19 pm
Location: Seattle, WA

Re: Which downcut bit should I buy?

Post by Caesar S » Thu Sep 03, 2015 12:36 am

Thank you! I'll try it out.

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