Precision ground glass stirring shafts, 10mm OD, button type, PTFE coating permits higher stirring speeds with Trubore bearings. If used unlubricated, 500 rpm max with water-cooled 8040 bearing. Compatible with 8036, 8038, 8039, 8043, 8047, 8051, 8055 and 13443 bearings. Button type shafts accept 8083, 8085, 8086, 8087 and 8096 stir baldes. Join to stirrer motor using 8124 series chucks.