Cnc youtube

http://www.youtube.com/watch?v=20jIxK8LoR8 24 bearings per side, 6min 
http://www.youtube.com/watch?v=g3L55ZD4rpI Based on http://www.dillingercnc.com, square tube with bearings top and bottom , clamped by threaded rod.
http://www.youtube.com/watch?v=nR0o2I4qxAQ based off geeksgone bad design with v-bearings
* http://www.youtube.com/watch?v=PdnQN6PwX8k Bearings design, based on http://www.cncrouterparts.com/linear-carriage-with-abec-7-bearings-p-33.html tandard Linear Carriage, complete with bearings and hardware. Our premium linear motion system now comes standard with ABEC 7 Bearings. This carriage is designed to run on 1/4" cold rolled (1018) steel -- just purchase steel that overhangs your extrusion by 1/2", and you can build your own precision linear axis. We recommend Online Metals for your small quantity orders: $24
* http://thunderdork.com/diy-cnc-router-homemade-linear-bearings/
* https://www.youtube.com/watch?v=45SVn8llkZk&feature=youtu.be
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