BBTC Magnetic Stir Bar PTFE Lab 10x40mm Ring Shape 10pcs

Description

Product Overview

The BBTC magnetic stir bar is engineered from premium Polytetrafluoroethylene (PTFE), a material renowned for its inertness, non‑stick properties, and resistance to a broad spectrum of chemicals. Each bar features an olive‑ring shape that maximizes magnetic coupling while minimizing drag, delivering consistent and efficient stirring performance across a range of laboratory applications.

Measuring precisely 10 mm in diameter and 40 mm in length, the dimensions are optimized for standard laboratory magnetic stir plates and hot plates. The bars are supplied in a set of ten, each individually wrapped in a clean, clear plastic bag to protect the surface from contamination and to ensure they arrive in pristine condition. The packaging is both lightweight and sturdy, making it ideal for bulk shipping and easy inventory management.

Beyond its chemical resistance, the PTFE construction provides excellent thermal stability, allowing the stir bars to operate reliably from -70 °C up to 260 °C. This wide temperature range makes them suitable for both low‑temperature crystallization processes and high‑temperature reflux reactions without deformation or loss of magnetic strength.

The magnetic core is composed of a high‑grade neodymium alloy, delivering a powerful magnetic field that ensures the bar remains firmly attached to the stir plate even under vigorous stirring conditions. This strong magnetic response reduces the risk of the bar detaching, which can lead to sample loss or contamination.

Each bar is designed with a smooth, polished surface that prevents sample adhesion, making cleaning straightforward. The PTFE surface does not absorb solvents, acids, or bases, ensuring that the bar can be reused repeatedly without cross‑contamination, thereby extending its service life and reducing operational costs.

Usage

These stir bars are ideal for a variety of laboratory processes, including solution mixing, dissolution, heating, and reaction monitoring. They perform exceptionally well in standard magnetic stir plates, orbital shakers, and hot plates commonly found in chemistry, biology, and pharmaceutical labs.

When used in temperature‑controlled environments, the PTFE material maintains its structural integrity, allowing the bar to function reliably during both cryogenic and high‑heat applications. Researchers can confidently employ the bars in processes such as reflux, distillation, and crystallization without concern for material degradation.

The 10 mm × 40 mm size is compatible with most standard stir plate slots, providing a versatile solution for both small‑scale bench work and larger batch processes. The olive‑ring shape reduces vortex formation, ensuring a gentle yet thorough mixing action that minimizes shear stress on delicate biomolecules or polymers.

In addition to chemical laboratories, the stir bars are well suited for educational settings, quality‑control labs, and industrial research facilities where consistent mixing performance is essential. Their non‑reactive nature makes them safe for use with a wide range of solvents, acids, bases, and organic compounds.

For optimal performance, users should ensure the stir plate’s magnetic field strength is appropriate for the bar size and that the bar is centered within the vessel. Proper placement maximizes magnetic coupling and reduces the likelihood of slippage during high‑speed stirring.

Why Choose Us

BBTC is a trusted manufacturer in the laboratory equipment sector, known for rigorous quality control and adherence to international standards. Each magnetic stir bar undergoes a multi‑stage inspection process, including dimensional verification, magnetic strength testing, and surface integrity assessment, ensuring that every unit meets exacting performance criteria.

Our commitment to durability is reflected in the choice of PTFE and high‑grade neodymium magnets, materials that provide long‑term reliability even under demanding laboratory conditions. The combination of chemical inertness and thermal resilience reduces the need for frequent replacement, delivering cost‑effective solutions for busy research environments.

Customer support is a cornerstone of BBTC’s service philosophy. We provide comprehensive technical documentation, usage guidelines, and responsive after‑sales assistance. Should any issue arise, our dedicated support team is available to troubleshoot, replace, or advise on optimal usage, ensuring uninterrupted laboratory workflows.

All BBTC products are manufactured in facilities that comply with ISO 9001 quality management standards, guaranteeing consistent product quality and traceability. This certification underscores our dedication to delivering reliable, high‑performance laboratory tools that scientists can trust.

Key Features

• Premium PTFE construction offers superior chemical resistance and easy cleaning.
• Olive‑ring shape provides strong magnetic coupling while minimizing vortex formation.
• High‑grade neodymium core delivers reliable stirring even at high speeds.
• Wide temperature range (-70 °C to 260 °C) supports diverse laboratory applications.
• BBTC after‑sales support ensures prompt assistance and product replacement if needed.

FAQ

What types of solvents are compatible with the PTFE stir bar?

The PTFE material is inert to most organic solvents, acids, and bases, including acetone, ethanol, hydrochloric acid, and sodium hydroxide. It does not absorb or react with these chemicals, making it safe for a broad range of laboratory applications.

Can the stir bar be used on a hot plate with temperatures above 200 °C?

Yes. The PTFE composition remains stable up to approximately 260 °C, allowing the bar to function on hot plates and reflux setups that operate at high temperatures without deformation or loss of magnetic performance.

How many times can the stir bar be reused before it needs replacement?

When properly maintained—cleaned after each use and stored in a clean environment—the PTFE stir bar can be reused many times, often exceeding 100 cycles. Its durability depends on exposure to abrasive materials and extreme conditions.

Is the magnetic strength affected by prolonged exposure to strong magnetic fields?

The neodymium core is designed to retain its magnetic strength over long periods. However, exposure to extremely strong external magnetic fields may cause a slight reduction in performance, though this is uncommon in typical laboratory settings.

What packaging options are available for bulk orders?

For bulk purchases, BBTC can provide custom packaging solutions, including larger poly‑bags or sealed cartons, to meet specific inventory and shipping requirements while maintaining product integrity.