Spherical Ground Joint, Cup

The GISCOM Spherical Ground Joint (Cup) is a precision-crafted interchangeable joint designed to provide secure, leak-free spherical connections in laboratory glassware systems. Its ground spherical surface allows smooth rotation, flexible alignment, and stable coupling with mating ball joints. Essential in distillation, reaction setups, and specialized assemblies, this joint ensures dependable sealing performance in research and industrial environments.

Key Features

• Manufactured from premium Borosilicate Glass 3.3 for superior durability and thermal resistance
• Precision-ground spherical surface for airtight connections and smooth articulation
• Complies with DIN 12264 standard for universal interchangeability
• Excellent chemical resistance suitable for harsh solvents and reagents
• High mechanical strength to withstand repeated use and heating cycles
• Smooth finish minimizes wear during assembly and prevents leakage
• Allows flexible orientation of the apparatus without strain on the glassware
• Compatible with standard laboratory ball-and-socket systems

Material Specifications

• Material: Borosilicate Glass 3.3
• Thermal Properties: Low coefficient of thermal expansion (approx. 3.3 × 10⁻⁶ / °C), High thermal shock resistance
• Chemical Resistance: Resistant to acids, alkalis, solvents, oils, and most laboratory chemicals
• Mechanical Strength: Strong and stress-resistant body with ground surface integrity
• Standards Compliance: DIN 12264 (Spherical ground joint dimensions & tolerances) Manufactured under ISO-compliant quality systems

 Technical Specifications

• Available Joint Sizes: As per the standard size table
• Dimensions: Conforms to strictly spherical geometry and taper depth requirements
• Accuracy/Tolerance: Precision-ground joint surfaces ensure a secure fit with minimal clearance
• Calibration: Not applicable (non-volumetric component)
• Accessories Included: Optional ball joints, clamps, and compatible connectors available separately

Handling & Precautions

• Handle carefully to avoid impact on the ground’s spherical surface
• Clean with standard laboratory detergents; avoid abrasive pads or harsh mechanical scrubbing
• Fully compatible with autoclaving and dry heat sterilization (up to approx. 180–200°C)
• Avoid direct flame contact on the ground area to maintain a precision finish
• Use appropriate joint clips or supports where required
• Store in padded or compartmented trays to prevent chipping or wear
• Do not force joints together; ensure proper lubrication when needed for vacuum applications

Applications

• Widely used in chemical research labs, universities, pharmaceutical R&D, and industrial QC/QA laboratories
• Ideal for distillation units, reaction vessels, extraction systems, and specialty apparatus requiring flexible articulation
• Common in organic chemistry workflows, sample preparation, and thermal or mechanical reaction assemblies
• Suitable for biotechnology, petrochemical testing, analytical chemistry, and general scientific research
• Ensures reliable alignment and leak-free connections essential for high-precision experiments