[airnocker]

Build your own inexpensive DIY swivel drag knife for your CNC mill.

To make your own DIY Swivel Drag Knife Cutter all you need are:
1. one .25" x .125" rare earth magnet from Amazon.com
2. one 5mm OD, 2mm ID bearing from http://www.bocabearings.com
3. one 4mm OD, 1.5mm ID bearing from http://www.bocabearings.com
4. one 3/8" x 12" brass tube from Hobby Town USA or your local hobby store
5. three Carl Goldberg 3/16" wheel collars from Hobby Town USA or local hobby store
6. one spring that slides easily down the 3/8" brass tube, has an ID > .25" and a compression force of 80-150 grams when compressed 3/16"
7. Roland replacement blades 45 or 60 degree from Ebay.com
8. A copper pipe cutter such as a Rigid Model 104.
9. A tiny amount of thin CA (Cyanoacrolate also known as Super Glue)
10. A tiny amount of Loctite 609
11. Digital calipers (very helpful)

To read the complete article go to:

http://www.buildyourtools.com/forums...rb_v=viewtopic

airnocker

Everything depends on everything else.

There is a typing error in item #3 - the OD should read 5mm not 4mm.
Also item #5, Carl Goldberg wheel collars are not available any more but similar collars are available from Dubro or Great Planes brands. As you might have guessed I have these CG collars for a very long time.

This correction has been made in the buildyourtools.com forum as well.

I apologize for this oversight.