Useful Links!

Talk about all things CNC
edwardrford
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Useful Links!

Post by edwardrford » Mon Apr 16, 2012 8:56 pm

Spindle Information relating to end mill selection: http://www.cncathome.com/spindles.html
Speed and Feed Information: http://www.cncathome.com/speedsnfeeds.html
Link to wikipedia overview of Milling Cutters: http://en.wikipedia.org/wiki/Milling_cutter

Link to Enco (inexpensive end mills): http://www.use-enco.com/

Feel free to add useful End mill links in your replies to this thread!

alpha
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Re: Useful Links!

Post by alpha » Tue Apr 17, 2012 8:37 pm

Last edited by alpha on Fri Aug 03, 2012 7:25 pm, edited 4 times in total.

RedOko
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Re: Useful Links!

Post by RedOko » Thu Apr 19, 2012 3:06 pm

found one especially for plastic.

Image

http://www.usdrills.com/Brad-Point-Drills_c_212.html
a cheaper one

These drill bits are intended for drilling holes, the sharp center keeps it from walking and the cutting action prevents the plastic from climbing up the drill once you cut thru. A good example is this one from cambam website.

Image
Last edited by RedOko on Thu Apr 19, 2012 5:25 pm, edited 2 times in total.
Luis
aka "RedOko"

edwardrford
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Re: Useful Links!

Post by edwardrford » Thu Apr 19, 2012 3:34 pm

That won't work as an endmill. From what I can see it's a standard drilling bit, not meant for side cutting.

There's always a lot of talk regarding if one should use an end mill to "drill", and I think purists would tell you that an end mill is for milling and a drill is for drilling. However, there is a class of endmill referred to as 'center cutting' that allows for straight plunges (drilling). That's what I use.

From the wikipedia article on milling cutters (http://en.wikipedia.org/wiki/Milling_cutter):
Center cutting: Some milling cutters can drill straight down (plunge) through the material, while others cannot. This is because the teeth of some cutters do not go all the way to the centre of the end face.....
You could always use a drill bit in your spindle, but that would require the need to switch bits during the job, which would require you to re-zero the z-axis to the work surface.

-Edward
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Enraged
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Re: Useful Links!

Post by Enraged » Thu Apr 19, 2012 4:20 pm

The nice thing about using an end mill to drill is that if you size the end mill correctly, you can make multiple hole sizes, whereas with a drill bit, you can only make one. An end mill also allows you to counterbore for socket head bolts.

Tom Smith
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Re: Useful Links!

Post by Tom Smith » Thu Apr 19, 2012 10:37 pm

While not directly CNC related, there is a lot of good info here about jig making with regard to woodworking, including mechanisms, etc, that is valuable information!

http://woodgears.ca/
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nio
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Re: Useful Links!

Post by nio » Wed Apr 25, 2012 12:53 pm

how to milling plastic....
http://www.boedeker.com/fabtip.htm

Tom Smith
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Bending Aluminum

Post by Tom Smith » Thu May 24, 2012 5:57 pm

Unless you want to bolt things together, it is useful to be able to bend aluminum (and other sheet metal) for use in enclosures,etc.

Here is an example of some very fine work, and a technique for doing the bending (scroll down a bit for the bending brake)

http://runawaybrainz.blogspot.com/2011/ ... -with.html
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tioJim
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Re: Useful Links!

Post by tioJim » Sat Jan 12, 2013 1:02 pm


dointhangs
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Re: Useful Links!

Post by dointhangs » Thu Jan 31, 2013 4:17 am

I just saw that theres a really sweet article on "cnc panel joinery" in the latest issue of make magazine, really interesting. And it also points to a blog post that I think is almost identical and I dont think I am logged in as a subscriber or anything, anyone should be able to see it: http://blog.makezine.com/2012/04/13/cnc ... -notebook/
Shapeoko #298, dual drive upgrade, acme z axis, open bed endplates and a slightly larger ("expanded desktop") work area!

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