PTFE Spin Bar White 1.18" x 33 mm Rare Earth

The PTFE Rare Earth Spin Bar 33mm is a laboratory magnetic stirring accessory designed for use with compatible magnetic stirrers and vessels. Its compact size makes it useful for bench-scale liquid mixing where a relatively small stir bar is appropriate. The internal rare-earth magnetic element is enclosed by a white PTFE exterior, allowing the bar to couple with the rotating magnetic field produced by the stirrer.

The PTFE Rare Earth Spin Bar 33mm uses PTFE as its liquid-contact surface. PTFE is commonly selected for magnetic stir bars because of its smooth surface and resistance to many chemicals. Compatibility should still be checked against the specific material, temperature, cleaning method, and procedure being used rather than assuming universal chemical resistance.

Mixing performance with the PTFE Rare Earth Spin Bar 33mm depends on vessel geometry, liquid depth, viscosity, stirrer strength, and selected rotational speed. Strong magnetic coupling can be useful in demanding mixing conditions, but no single stir bar is optimal for every vessel or liquid. If the bar decouples, jumps, or rotates irregularly, reduce speed and confirm that its size and shape are suitable for the setup.

Inspect the PTFE surface before each use and remove the bar from service if it becomes cracked, deeply scratched, distorted, or otherwise damaged. Clean it with a method compatible with PTFE and the substance being handled. Use a magnetic retriever when convenient to remove the bar without unnecessarily reaching into laboratory vessels.

Select the PTFE Rare Earth Spin Bar 33mm for compatible magnetic stirring applications requiring a compact rare-earth stir bar. Browse related stir bars, retrievers, and mixers in our Lab Heating, Stirring & Mixing Equipment collection.