Teflon Spin Bar Octagon W/ Pivot Ring (Ball Shape)

The PTFE Octagonal Stir Bar with Pivot Ring is a laboratory magnetic mixing accessory designed for use with compatible magnetic stirrers and vessels. Its octagonal profile and central pivot ring distinguish it from conventional smooth cylindrical stir bars. The pivot ring creates a defined contact point with the vessel bottom, which can influence rotation and reduce the amount of the bar surface contacting the glass.

The PTFE Octagonal Stir Bar with Pivot Ring has a PTFE exterior that provides a smooth liquid-contact surface and useful resistance to many chemicals. PTFE is commonly used for laboratory stir bars because it separates the internal magnetic element from the liquid being mixed. Confirm chemical and temperature compatibility for the specific procedure rather than assuming universal resistance.

Performance of the PTFE Octagonal Stir Bar with Pivot Ring depends on vessel geometry, liquid depth, viscosity, magnetic stirrer strength, fill volume, and selected speed. The pivot-ring design may behave differently from pill-shaped, cylindrical, flea, or star-shaped stir bars. If the bar jumps, rattles excessively, or loses magnetic coupling, reduce speed and verify that its shape and size suit the vessel.

Inspect the PTFE exterior before use. Remove the bar from service if it becomes cracked, deeply scratched, distorted, or otherwise damaged. Clean it with methods compatible with PTFE and the substance being handled. Available color variants include white and tan, subject to current inventory.

Choose the PTFE Octagonal Stir Bar with Pivot Ring when this geometry suits your compatible magnetic mixing setup. Browse additional stir-bar shapes, magnetic retrievers, hot plates, and mixers in our Lab Heating, Stirring & Mixing Equipment collection.