Description
GT stirrer seal with cone NS 45/40 is a laboratory stirrer closure designed for shafts of 10 mm diameter and equipped with a GL 25 connection. A PTFE guide sleeve ensures precise shaft guidance and low-friction rotation while preserving a reliable seal. The unit has an overall length of 110 mm and is manufactured from borosilicate glass 3.3, giving chemical resistance and thermal stability for use with standard laboratory glass apparatus. The ground joint cone NS 45/40 provides a standardised fit to larger flask necks and reactor openings commonly employed in synthesis and scale-up work. Available as one piece, this GT stirrer seal from manufacturer Rettberg supports overhead stirring setups that require secure shaft sealing and vapour containment. The combination of a borosilicate glass 3.3 body and PTFE sleeve delivers durable performance under continuous operation and minimises wear on the stirrer shaft. It is well suited to mixing and reaction applications where a chemically inert, mechanically robust closure is essential.
This article is part of Lids & seals, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Product type: Stirrer seal
- Joint size: NS 45/40
- Shaft diameter: 10 mm
- Thread: GL 25
- Guide sleeve: PTFE
- Technical Information Sheet:
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Questions about Glass stirrer bearing, cone size 45/40, for stirring shaft Ø 10 mm, GL 25
What is this article?
Glass stirrer bearing, cone size 45/40, for stirring shaft Ø 10 mm, GL 25 is the article on this page. Luminix Health distributes Rettberg for laboratory use. It sits in Lids & seals, inside Stoppers, caps & closures, in Labware.
Lids and seals are the covers of dishes, jars and tanks: a snap lid, a sealing film, a gasket. The seal is doing the work. A lid that only rests on the rim does not contain a volatile liquid.
A closure is the part that decides whether a bottle stays shut and whether the contents attack the seal. A ground-glass stopper matches a ground neck. A screw cap needs the right thread and a liner that survives the liquid. Rubber and silicone stoppers push into a mouth. The liner, not the colour of the cap, is the chemical choice. The vessels they close are indexed under ISO laboratory glassware.
Which category should I open next?
The category is Stoppers, caps & closures. The sub-category is Lids & seals. The catalogue is Labware.
Shelves beside this one are Screw caps & closures, Rubber & silicone stoppers, Ground-joint glass stoppers and Closures (other).
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. Delivery across the EU, two to five days if in stock. 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.
