SP Bel-Art Spinbar Teflon Octagon Stirring Bar 50.8×9.5mm White

Description

Product Overview

The SP Bel-Art Spinbar Teflon Octagon Stirring Bar is engineered for high‑performance mixing in demanding laboratory and industrial environments. Measuring 50.8 × 9.5 mm, the bar provides a compact footprint while delivering a powerful magnetic torque that drives rapid fluid motion. Its PTFE (polytetrafluoroethylene) coating creates a chemically inert barrier, allowing the bar to operate safely with acids, bases, solvents, and other corrosive reagents without degradation. The octagonal geometry is a deliberate design choice; the multiple flat faces disrupt laminar flow and create turbulent eddies, producing a stronger vortex than traditional cylindrical stir bars. Inside the PTFE shell, an alnico V magnet—an alloy of aluminum, nickel, iron, and cobalt—generates a stable magnetic field that maintains consistent rotation even under high‑viscosity conditions. A built‑in pivot ring further stabilizes the bar, minimizing vibration and wear during prolonged use. The product complies with food, drug, and cosmetic industry standards, making it suitable for a wide range of applications, from analytical chemistry to formulation development.

Usage

Designed for versatility, this stirring bar excels in a variety of settings. In analytical laboratories, it provides reliable mixing for sample preparation, dissolution of solids, and homogenization of solutions prior to spectroscopic or chromatographic analysis. In research and development labs, the bar supports formulation work for pharmaceuticals, cosmetics, and food products, where its PTFE coating ensures no leaching of contaminants. Industrial users benefit from its durability in large‑scale reactors, where continuous stirring is required for processes such as polymer synthesis, metal plating baths, and wastewater treatment. The magnetic coupling allows the bar to be used with standard magnetic stir plates, hot plates, and temperature‑controlled platforms, offering seamless integration into existing workflows. Its compact size makes it ideal for micro‑scale experiments, while the robust construction ensures long‑term service life even under rigorous cleaning protocols, including autoclaving and solvent rinses.

Why Choose Us

Choosing the SP Bel-Art Spinbar means selecting a product backed by decades of expertise in laboratory instrumentation. Bel-Art Products is a recognized leader in scientific equipment, and each stirring bar undergoes strict quality control testing to verify magnetic strength, dimensional accuracy, and coating integrity. The PTFE coating is certified for use in regulated industries, providing confidence that the bar will not introduce impurities into critical samples. Our manufacturing process incorporates precision machining and controlled magnetization, ensuring each bar meets the exact specifications required for reproducible results. In addition to product quality, we offer responsive technical support, detailed usage guidelines, and a responsive warranty program that addresses any performance concerns promptly. Customers benefit from a reliable supply chain, fast shipping, and the assurance that the product will perform consistently across multiple batches and applications.

Key Features

• Octagonal PTFE coating creates stronger vortex for faster, uniform mixing
• Chemically inert PTFE surface resists corrosion from acids, bases, and solvents
• Alnico V internal magnet provides stable magnetic torque even in high‑viscosity fluids
• Built‑in pivot ring reduces vibration, extending bar lifespan and minimizing wear
• Comprehensive technical support and warranty ensure reliable after‑sales service

FAQ

What size magnetic stir plate is required for this bar?

The 50.8 × 9.5 mm bar works well with standard laboratory magnetic stir plates that provide a magnetic field of at least 30 gauss at the surface. Most common bench‑top stir plates meet this requirement.

Can the PTFE coating be damaged by cleaning solvents?

The PTFE coating is highly resistant to most organic solvents, acids, and bases. It can be cleaned with ethanol, acetone, or dilute acid solutions without compromising performance. Avoid abrasive cleaning tools that could scratch the surface.

Is this stirring bar suitable for use in temperature‑controlled reactors?

Yes. The bar is compatible with hot plates and temperature‑controlled magnetic stirrers up to 200 °C. The PTFE coating maintains its integrity across a wide temperature range, making it ideal for heated reactions.

How does the octagonal shape improve mixing compared to a round bar?

The flat faces of the octagon disrupt laminar flow, creating multiple points of turbulence that enhance fluid circulation. This results in a more vigorous vortex and reduces mixing time compared to a cylindrical bar of the same size.

What warranty does Bel-Art provide for this product?

Bel-Art offers a one‑year limited warranty covering manufacturing defects. If the magnetic strength diminishes or the PTFE coating shows premature wear under normal use, we will replace the bar at no cost.