Description
Spherical joint ball KS51/30 is a precision laboratory glass component designed for reliable spherical ground-joint connections in chemical apparatus. Produced from DURAN tubing, it follows the KS 51/30 geometry with overall dimensions of 36 x 150 x 2,8 mm and conforms to DIN 12264/12244. The ball element mates with a matching spherical joint socket to create a flexible, vacuum-capable seal that accommodates slight angular misalignment—ideal for distillation trains, reaction setups and modular glassware assemblies where rigid conical joints would introduce stress. Supplied as a single piece with a net weight of 0,123 kg, the component integrates smoothly into existing DURAN-based systems. Manufactured by Witeg, this spherical joint ball offers the dimensional consistency expected in analytical and preparative laboratories. Its robust wall thickness supports repeated assembly and cleaning cycles while maintaining optical clarity for visual process monitoring. Suitable for general laboratory glass construction, teaching laboratories and pilot-scale process equipment that rely on standardised spherical joints.
This article is part of Ground-joint glassware (other), in Distillation & extraction glassware.
Key features
- Pack size: 1 pc
- Joint size: KS 51/30
- Dimensions: 36 x 150 x 2,8 mm
- Material: DURAN tubing
- Standard: DIN 12264/12244
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Distillation & extraction glassware
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Ground-joint glassware (other)
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Questions about Spherical joints S 51/30
What is this article?
Spherical joints S 51/30 is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Ground-joint glassware (other), inside Distillation & extraction glassware, in Labware.
This is ground-joint glassware that is not a head, a condenser or a Soxhlet: receivers, blank joints, odd adapters. A ground joint is named by the wide end and the length, such as 29/32. Mismatched joints do not seal, even with grease.
Distillation separates liquids by boiling point. A condenser turns the vapour back into liquid: Liebig, coil and cold-finger shapes differ in how much cooling surface they offer. A still head and a column sit between the flask and the condenser. A Soxhlet extractor washes a solid again and again with the same solvent. Ground joints have a standard size, and the joint, not the flask, is what has to match. The pieces are indexed under ISO laboratory glassware.
Which category should I open next?
The category is Distillation & extraction glassware. The sub-category is Ground-joint glassware (other). The catalogue is Labware.
Shelves beside this one are Distillation heads, adapters & columns, Condensers and Soxhlet & extraction apparatus.
What should I check before I order?
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
How does ordering and shipping work?
Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.