linear rail bolts for sale, brand-new and used.

Kossel Mini Linear Carriage Rollers For 15x15mm extrusion -- should work with OpenBeam or Misumi extrusions. Replaces the MGN12H or MGN12 Linear Rail / Carriage -- this part can save you the $120 purchase these rails and carriages usually sell for on ebay or elsewhere. These are based on Johann's recirculating ball carriage design, with an extra modification to the carriage that allows for the use of open belts (much less expensive).

Smooth motion, nice condition. This carriage has 4 rows of balls rolling on the sides of the rail for better rigidity. The mounting bolts are taped to the rail.