I was wondering how many people used this 8020 plastic stuff as a bearing?
http://cgi.ebay.com/8020-T-Slot-UHMW-UniBearing-Profile-15-S-Lot-BJ-5pcs_W0QQitemZ330073900774QQihZ014QQcategoryZ61798QQtcZphotoQQcmdZViewItem


I do not see where it would be efficient. I am using skate bearing from VBX on mine. If I thought this would be good enough - it is cheaper and less work to put something together with it. But think regular ball bearings are better.

Thanks

Yeah - steer clear for a linear system - like a machine. These have a place and they do OK for some things, but they are a bit sloppy and have a lot more moving resistance than one might think.

Scott