PTFE stirrer bearing featuring a non-shedding, fully enclosed, anti-whip, chemically resistant design. Models available for 6, 8 and 10mm glass, metal or PTFE stir shafts. Can be used in slight pressure or vacuum applications. Maximum recommended speed for continuous operation is 500 rpm. Unlike traditional bearings, the upper portion rotates with the shaft like a collet. Bearing bottom is a standard taper joint.