StonyLab Double Cross Magnetic Stir Bar 2-Pack 1.34″ x 0.47″ PTFE

Description

Product Overview

The StonyLab Double Cross Magnetic Stir Bar Set is engineered for precision and durability in demanding laboratory environments. Each pack contains two high‑quality stir bars measuring 1.34 inches in diameter and 0.47 inches in width, featuring a double‑cross geometry that maximizes magnetic coupling and fluid dynamics. The bars are fully coated with a PTFE (polytetrafluoroethylene) layer, delivering a low‑friction surface that reduces wear while providing exceptional chemical resistance. This coating protects the stir bars from corrosive solvents, high‑temperature conditions, and abrasive media, extending their service life and maintaining consistent performance over repeated use. The compact size and robust construction make these stir bars suitable for a broad spectrum of applications, from routine sample preparation to complex reaction monitoring in chemistry, biotechnology, and industrial research settings. With a weight of just 1.06 ounces per bar, they are easy to handle and fit standard magnetic stirrer platforms without compromising stability.

Usage

Designed for versatility, the StonyLab stir bars excel in a variety of laboratory workflows. They are ideal for mixing solutions in beakers, flasks, and reaction vessels ranging from 10 mL to 500 mL, providing uniform agitation that enhances solute dissolution and reaction kinetics. The double‑cross design creates a turbulent flow pattern, ensuring thorough mixing even in viscous or high‑viscosity media. Researchers in analytical chemistry can rely on these bars for sample homogenization prior to spectroscopic analysis, while biotechnologists benefit from gentle yet effective stirring of cell culture media, enzyme reactions, and buffer preparations. The PTFE coating also makes the bars compatible with aggressive acids, bases, and organic solvents, allowing seamless integration into protocols that involve harsh reagents. Because the stir bars are magnetically driven, they eliminate the need for mechanical contact, reducing contamination risk and simplifying cleanup. Their small footprint enables simultaneous use of multiple bars in a single stir plate, supporting high‑throughput experimentation and parallel processing.

Why Choose Us

StonyLab is committed to delivering laboratory accessories that combine scientific rigor with practical reliability. Our double‑cross magnetic stir bars undergo stringent quality control procedures, including dimensional verification, magnetic strength testing, and PTFE coating integrity assessment. Each bar is inspected for surface uniformity to guarantee consistent magnetic coupling and to prevent premature degradation. The 1‑year limited manufacturer warranty underscores our confidence in product durability and provides customers with peace of mind. In addition to the superior material properties, StonyLab offers responsive technical support and a dedicated after‑sales service team ready to address any questions regarding product compatibility, usage optimization, or troubleshooting. By choosing StonyLab, laboratories gain access to a trusted brand that prioritizes performance, safety, and customer satisfaction, ensuring that critical experiments are supported by reliable mixing tools.

Key Features

• Double‑cross geometry delivers strong magnetic coupling for stable, high‑speed stirring.
• PTFE coating provides excellent chemical resistance and low‑friction performance.
• Compact 1.34″ × 0.47″ size fits a wide range of vessel diameters and stir plates.
• Durable construction resists high temperatures, corrosion, and abrasion for long service life.
• Includes 1‑year limited warranty and dedicated customer support for peace of mind.

FAQ

What types of solvents are compatible with the PTFE coating?

The PTFE coating is resistant to most organic solvents, acids, and bases, including acetone, ethanol, hydrochloric acid, and sodium hydroxide. It can also withstand temperatures up to 260 °C, making it suitable for a broad range of chemical applications.

Can the stir bars be used on any magnetic stirrer?

Yes, the bars are designed to work with standard laboratory magnetic stirrers that support a 1.34‑inch diameter bar. They are compatible with most bench‑top stir plates and hot plates equipped with magnetic stirring capabilities.

How do I clean the stir bars after use?

Rinse the bars with deionized water immediately after use, then soak them in a suitable solvent if residues remain. Avoid abrasive cleaning tools; a gentle brush or ultrasonic bath can be used for thorough cleaning without damaging the PTFE coating.

Is the double‑cross design better than a simple cylindrical bar?

The double‑cross shape creates more turbulent flow within the liquid, enhancing mixing efficiency and reducing dead zones. This design improves magnetic coupling strength, especially at higher stirring speeds, compared to traditional cylindrical bars.

What is covered under the 1‑year warranty?

The warranty covers manufacturing defects in the magnetic core and PTFE coating. If a bar fails due to material defects within the warranty period, StonyLab will replace it at no cost to the customer.