PTFE Joint Stirrer Bearing Bel-Art 24/40 Joints with PTFE Inserts

Description

Product Overview

The Bel-Art PTFE Joint Stirrer Bearing is a precision‑engineered laboratory component designed to fit 24/40 tapered joints and accommodate 10 mm stirring rods. Constructed from high‑performance PTFE, the bearing offers exceptional chemical resistance, ensuring longevity even when exposed to aggressive solvents, acids, and bases commonly used in organic synthesis and analytical chemistry. The device incorporates two PTFE inserts equipped with internal O‑rings, allowing users to fine‑tune rod tension for optimal torque transfer and minimal wobble. A threaded polypropylene compression cap provides a secure, leak‑free seal, while an extraction nut enables quick and safe removal from flasks or reactors. Dimensions of 7.95 × 4.02 × 1.30 inches and a weight of just 31.8 g make the bearing compact and easy to handle on crowded bench tops. Model number 203201660, released in November 2009, has earned a five‑star rating from users who value its reliability and ease of use.

Usage

This stirrer bearing is ideal for a wide range of laboratory applications, including chemical synthesis, bioprocessing, and analytical testing where precise mixing is critical. It performs exceptionally well in temperature‑controlled environments, such as reflux setups, cryogenic reactions, and high‑temperature incubations, thanks to the PTFE material’s stability across a broad temperature range. Researchers in academic, industrial, and pharmaceutical settings can rely on the bearing to maintain consistent stirring speeds, reduce vortex formation, and prevent cross‑contamination between experiments. The threaded polypropylene cap ensures a tight seal, making the bearing suitable for closed‑system reactions that require inert atmospheres or pressure control. Its lightweight design also facilitates rapid swapping between multiple reactors, improving workflow efficiency in high‑throughput labs.

Why Choose Us

Choosing the Bel-Art PTFE Joint Stirrer Bearing means selecting a product backed by decades of expertise in laboratory glassware and accessories. Bel-Art’s rigorous quality‑assurance program includes multiple rounds of testing for chemical compatibility, mechanical durability, and dimensional accuracy, ensuring each bearing meets exacting standards before it reaches the user. The dual‑insert system provides a level of adjustability rarely found in competing products, allowing scientists to customize the bearing to their specific rod dimensions and torque requirements. Additionally, the inclusion of an extraction nut reduces downtime during cleaning and maintenance, a feature that many users cite as a major productivity enhancer. Bel-Art also offers responsive technical support and a clear warranty policy, giving customers confidence that their investment is protected.

Key Features

• High‑performance PTFE body resists corrosion from acids, bases, and organic solvents.
• Dual PTFE inserts with O‑rings allow precise tension adjustment for smooth, wobble‑free stirring.
• Threaded polypropylene compression cap creates a leak‑free seal, ideal for closed‑system reactions.
• Compact, lightweight design (7.95 × 4.02 × 1.30 in, 31.8 g) simplifies bench organization and handling.
• Dedicated technical support and warranty ensure reliable after‑sales service.

FAQ

Can this bearing be used with rods other than 10 mm?

While the bearing is optimized for 10 mm rods, the adjustable PTFE inserts can accommodate slightly smaller or larger diameters, provided the rod fits within the tolerance range of the joint.

Is the bearing compatible with high‑temperature reactions?

Yes. PTFE maintains its mechanical integrity and chemical resistance up to 260 °C, making the bearing suitable for most high‑temperature laboratory processes.

How do I replace the PTFE inserts?

To replace the inserts, loosen the threaded polypropylene cap, remove the existing inserts, insert the new PTFE pieces ensuring the O‑rings are seated correctly, and retighten the cap to the recommended torque.

What cleaning procedures are recommended?

Rinse the bearing with deionized water after each use, followed by a soak in a mild detergent solution if residues are present. For stubborn contaminants, a brief immersion in a compatible solvent (e.g., acetone) is acceptable, then rinse thoroughly and dry.

Does the product come with a warranty?

Bel-Art provides a one‑year limited warranty covering manufacturing defects. Contact customer service for claim procedures and replacement options.