Beschrijving
Plastic double universal joint, Ø 8 mm, for glass shafts is a connecting element engineered to compensate angular or axial misalignment between a stirrer drive and a glass stirring shaft. With an outer diameter of 8 mm and a maximum torque rating of 1,3 Nm, this double Cardan joint delivers controlled power transmission while protecting fragile glass components from excessive stress. The plastic construction provides a lightweight, non-metallic interface that is particularly suitable for glass-shaft assemblies common in laboratory reactors and precision mixing setups. Supplied as a single piece with a net weight of 0,17 kg, the joint is ready for direct installation in existing stirring systems. Offered by manufacturer Rettberg, it belongs to the stirrer-coupling and quick-connect range used in chemical, pharmaceutical and research laboratories. Typical applications include overhead stirrers fitted with glass shafts, small-scale reaction vessels and development equipment where gentle yet reliable torque transfer is essential. By absorbing minor offsets, the joint helps maintain smooth rotation and extends the service life of glass shafts and associated drive components.
This article is part of Stirring shafts, propellers & impellers, in Stirring, shaking & mixing.
Key features
- Pack size: 1 pc
- Diameter: 8 mm
- Outer diameter: 8 mm
- Maximum torque: 1,3 Nm
- Product type: Connecting element
- Technical Information Sheet:
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Questions about Stirrer coupling clamp, Ø 8 mm, double universal joint, plastic,
What is this article?
Stirrer coupling clamp, Ø 8 mm, double universal joint, plastic, is the article on this page. Luminix Health distributes Rettberg for laboratory use. It sits in Stirring shafts, propellers & impellers, inside Stirring, shaking & mixing, in Instrumenten.
A shaft, a propeller or an impeller is the wetted end of an overhead stirrer. The diameter and the pitch decide whether the liquid turns over. The material, stainless steel or PTFE, decides what the liquid may be. The chuck size has to match the stirrer.
Stirring keeps a mixture uniform or helps a solid dissolve. A magnetic stirrer spins a bar inside a closed vessel. An overhead stirrer drives a shaft when the liquid is viscous or the volume is large. A vortex mixer agitates a tube. A shaker moves a whole rack or a plate. The shape of the impeller and the speed decide whether the liquid turns over or merely spins. The vessels being stirred are indexed under ISO laboratory glassware.
Which category should I open next?
The category is Stirring, shaking & mixing. The sub-category is Stirring shafts, propellers & impellers. The catalogue is Instrumenten.
Shelves beside this one are Magnetic stirring bars, Magnetic stirrers, Stirring & mixing accessories, Homogenisers & dispersers, Shakers, rockers & rotators, Overhead stirrers and Vortex mixers.
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.
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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.