Three Prong Glassware Holding Clamp

Product Code : SCL-CL-12015

The Three Prong Clamp is a versatile, dual-adjustable laboratory holding device used for securing cylindrical or irregularly shaped glass vessels onto a retort stand assembly. Engineered for research chemists, laboratory technicians, and science educators, this heavy-duty hardware accessory provides a stable, non-slip grip that ensures maximum safety during complex distillations and fluid management workflows.

Product Description

The Three Prong Clamp from Science Lab Supplies delivers exceptional structural stability and operational reliability across demanding experimental configurations. Fabricated with a premium-grade die-cast aluminum alloy body attached to a solid 304 stainless steel extension shaft, this clamp withstands heavy mechanical loads without bending or slipping along the vertical column. The definitive 3-prong jaw layout utilizes a 3-point contact system, optimizing gripping pressure distribution to anchor both narrow tubes and wide-necked vessels securely.

This professional-grade laboratory hardware tool features two independently adjustable thumbscrews, giving operators exact control over jaw alignment and opening width. Each prong is wrapped in thick, heat-resistant vinyl protective sleeves, creating a cushioned physical buffer that absorbs physical vibrations and isolates delicate laboratory glassware from stress fractures caused by thermal expansion. It serves as an indispensable safety asset for high-temperature distillations, clinical assays, and high school chemistry classes alike.

Key Features

• Kinematic 3-Point Grip: Designed with a three-finger configuration that holds irregular, asymmetrical, and spherical glassware with superior balance.
• Dual-Adjustable Alignment: Features two independent threaded thumbscrews for precision jaw expansion and centered holding alignment.
• Premium Metal Composition: Built with a rugged die-cast zinc-aluminum alloy head and a high-tensile 304 stainless steel extension rod for heavy-duty load support.
• Protective Vinyl Sleeves: Tipped with high-friction polymer PVC coatings that prevent direct glass-to-metal contact and minimize mechanical slipping.
• Wide Universal Capacity: The adjustable jaw structure comfortably accommodates an expansive diameter range from 15 mm up to 85 mm.
• Chemical-Inert Finish: Outfitted with a durable powder-coated body surface that resists aggressive acid fumes, organic solvents, and alkaline spills.

Technical Specifications

What's Included in the Kit

• 2 x Heavy-Duty Three Prong Clamp Units
• 4 x Heat-Resistant Replacement Vinyl Prong Sleeves
• 1 x Apparatus Mounting and Safety Configuration Leaflet

Applications / Uses

• Suspending standard condensers and extraction columns vertically within fractional distillation setups.
• Stabilizing large separation funnels and round-bottom flasks over active heating instruments.
• Operating as a fundamental structural framing component inside high school and university physics science kits.
• Holding temperature probes, pH electrodes, and digital sensors accurately inside chemical solutions.
• Clamping hazardous or volatile reaction vessels safely away from the primary stand assembly to maximize operator safety buffer zones.

How to Use the Three Prong Clamp

1. Insert the solid stainless steel extension rod into a standard right-angle boss head clamp attached to a rigid laboratory retort stand.
2. Rotate both threaded thumbscrews counter-clockwise to open the three vinyl-sleeved prongs wider than the target container's diameter.
3. Advance the clamp horizontally until the glassware sits symmetrically within the center of the three fingers.
4. Turn each thumbscrew clockwise alternately to close the prongs smoothly around the vessel walls, ensuring all three tips establish simultaneous contact.
5. Tighten the screws gently past the initial contact point until the vessel is held firmly in place without vertical movement.

Handling Note: Never apply excessive manual torque to the thumbscrews once the vinyl jaws seat against the glass container. Over-tightening can crush the underlying glass framework, particularly when exposed to subsequent high thermal stresses.

Care & Maintenance

• Thread Preservation: Apply a single drop of light machine oil or silicone lubricant to the threaded adjustment shafts periodically to ensure frictionless open-close mechanics.
• Sleeve Assessment: Inspect the vinyl prong tips routinely for thermal degradation, deep splits, or chemical charring, replacing compromised sleeves instantly to prevent structural slippage.
• Corrosion Control: Clean the metal body and stainless steel rod with a damp cloth and mild neutral detergent after exposure to corrosive acid vapors to prevent microscale metal pitting.

Why Choose Science Lab Supplies

Science Lab Supplies is an internationally recognized manufacturer and elite exporter of high-accuracy laboratory instrumentation, educational training setups, and institutional hardware accessories. Backed by decades of professional engineering experience, we design rugged equipment that complies with strict global calibration and industrial safety frameworks. Our comprehensive logistics network enables highly efficient global supply capabilities to fulfill large-scale institutional, industrial, and school district shipments reliably on schedule. In addition to premium metal support tools, we maintain a vast selection of high-impact laboratory plasticware solutions to round out your facility's chemical containment infrastructure.

Frequently Asked Questions

What is a Three Prong Clamp used for?

It is a specialized laboratory hardware accessory used to grip and suspend glass flasks, condensers, tubes, and sensors securely onto a retort stand setup. Its dual-adjustable design allows it to adapt to varying container contours effortlessly.

What is the structural benefit of a 3-prong jaw over a 2-prong version?

A 3-prong layout provides a distinct 3-point kinematic grip, which distributes holding pressure far more evenly around asymmetrical, irregular, or spherical glass shapes, reducing the risk of point-pressure cracking.

What material are the prong protective sleeves made of?

The prongs are covered in heavy-duty, high-friction vinyl (PVC) sleeves that provide a cushioned barrier to absorb vibrations, maximize holding friction, and shield fragile glass from cold metal surfaces.

Can this extension clamp handle high-temperature applications?

Yes, the die-cast alloy head and stainless steel rod are fully flame-resistant. However, avoid placing the vinyl-coated prongs in direct contact with continuous open flames to prevent the protective polymer sleeves from melting.

Is the clamp shaft universally compatible with standard laboratory holders?

Yes, the 10 mm diameter stainless steel extension rod fits perfectly into all standard laboratory boss head clamps and multi-position connectors available on the market.

Explore our complete catalog of certified laboratory supports by visiting our dedicated laboratory hardware category page today to secure professional stability for your testing setups.