Stirring Shaft,19mm,12L-20L Flasks,730mm

Eliminates Flask Breakage: PTFE is the only contact in the lower radius of the flask, therefore breakage due to dropping the stirrer shaft has been eliminated. Eliminates the Frustration of Assembly: Unique design permits the proper amount of tension to be applied to the blade, thereby preventing the blade from flipping over to the incorrect side during insertion into the flask. Special PTFE blades are not required. Design permits use with any PTFE stirrer blade with the keyhole shaped cutout for 10mm or 19mm shafts. Available in both Ground and Polished styles. A 19mm OD precision ground and polished stirrer shaft with our patented Chem-Stir™ blade attachment system. Shaft (C) has been manufactured with a ring at the lower end to permit attachment of the blade (B) with a PTFE nut (D) and bolt (A). Shaft is supplied complete with PTFE nut and bolt set. For use with PTFE bearings such as the CG-2086. Polished shaft will not cause abrasion to the sealing surfaces of the PTFE bearing, thereby allowing a vacuum tight seal. Uses the same PTFE nut and bolt blade attachment method as the CG-2084 ground shaft. PLEASE NOTE: STIRRER BLADES MUST BE PURCHASED SEPARATELY.THESE SHAFTS ARE NOT TO BE USED WITH ANY TYPE OF GLASS BEARING. FOR GROUND SHAFTS USED WITH GLASS BEARINGS SEE CG-2084. ALSO NOTE: 19MM SHAFTS HAVE A REDUCED DIAMETER TOP SECTION THAT IS 1/2"OD, PLEASE KEEP THIS IN MIND WHEN SELECTING THE PROPER SIZE COUPLING. ** US Patent Number 5,326,167