PTFE Stirrer Bearing, Standard Joint Vacuum Seal, Anti-Rotation

High-performance PTFE stirrer bearing with a threaded locking ring. Provides a vacuum-tight seal and prevents the stopper from rotating at high speeds. Key Features Material: Pure PTFE (Teflon). Shaft Compatibility: Fits 7mm, 8mm, or 10mm OD stirring rods. Sealing: Threaded locking ring for a secure, vacuum-tight fit. Stability: Prevents stopper rotation during high-speed stirring. Compatibility: Fits standard ground glass joints. Maintenance: Grease-free and chemically inert. Specification Inner Hole Diameter (mm) Upper OD (mm) Lower OD (mm) Overall Height (mm) 19# / 7 mm Hole 7.3 21 19 57 19# / 8 mm Hole 8.3 21 19 57 24# / 7 mm Hole 7.3 21 24 59 24# / 8 mm Hole 8.3 21 24 59 24# / 10 mm Hole 10 21 24 59 29# / 7 mm Hole 7.3 21 29 61 29# / 8 mm Hole 8.3 21 29 61 34# / 7 mm Hole 7.3 21 34 63 34# / 8 mm Hole 8.3 21 34 63 40# / 7 mm Hole 7.3 21 40 66 40# / 8 mm Hole 8.3 21 40 66 45# / 7 mm Hole 7.3 21 45 69 45# / 8 mm Hole 8.3 21 45 69 60# / 7 mm Hole 7.3 21 60 75 70# / 8 mm Hole / / / / Note: Manual measurements may have slight deviations; actual product dimensions shall prevail.