Description
Spherical joint ball KS 13/5 is a precision laboratory glassware component for grease-free, flexible spherical ground-joint connections. Made from borosilicate glass 3.3, this ball element belongs to the Rotulex system and forms the male half of a KS spherical joint pair used in modular apparatus, distillation trains and vacuum glassware assemblies. The KS 13/5 joint size follows established laboratory standards, allowing angular movement between connected sections without joint grease and thereby reducing contamination risk while simplifying cleaning and reassembly. Supplied as a single piece with a net weight of 0,009 kg, the component is intended for research and industrial laboratories that require reliable, adaptable Schliff connections. The Rotulex design from manufacturer Rettberg supports secure yet flexible coupling of glass apparatus under typical chemical and thermal laboratory conditions. Borosilicate glass 3.3 provides the chemical durability and thermal-shock resistance expected of high-quality lab glass. This spherical joint ball integrates into existing Rotulex and standard KS configurations wherever a compact, grease-free ball joint is needed for flexible glassware layouts.
This article is part of Ground-joint glassware (other), in Distillation & extraction glassware.
Key features
- Pack size: 1 pc
- Joint size: KS 13/5
- Material: Borosilicate glass 3.3
- System: Rotulex
- Connection type: Grease-free, flexible
- Technical Information Sheet:
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Distillation & extraction glassware
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Ground-joint glassware (other)
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Questions about Spherical joint ball size 13/5, for grease-free, flexible connection,
What is this article?
Spherical joint ball size 13/5, for grease-free, flexible connection, is the article on this page. Luminix Health distributes Rettberg 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.