These v-groove bearing pulleys fit on an M3 x 16mm Hex Cap Screw and can be mounted directly onto extrusion. Use with 15mm Linear Motion Kits and a high tensile strength no-stretch string, such as kevlar string or spectra fishing line, to create an elevator.
Based on customer feedback, we have changed suppliers of this bearing. The new bearing has a much higher quality ball bearing in the center and better machining on the V-groove. Overall, these changes increase the load carrying capacity and how smooth lifts are when using these bearings. Orders placed after Sept 24, 2017 will ship with the new higher quality bearings automatically.