Description
GT stirrer seal with cone NS 29/32 is a laboratory stirrer closure for shafts of 10 mm diameter, fitted with a GL 25 connection. It incorporates a PTFE guide sleeve that supports smooth shaft rotation while maintaining an effective seal at the vessel interface. With an overall length of 90 mm and manufactured from borosilicate glass 3.3, the component offers chemical resistance and thermal stability suited to standard laboratory glassware. The precision ground joint cone NS 29/32 mates with common flask necks and reactor ports used in synthesis and process work. Supplied as a single piece, this GT stirrer seal from manufacturer Rettberg is intended for overhead stirring arrangements where reliable shaft guidance and vapour containment are required. The borosilicate glass 3.3 body combined with the PTFE sleeve provides durable, low-friction performance during continuous mixing. It is suitable for reaction vessels and apparatus that demand a chemically inert, mechanically stable sealing solution between the drive and the process medium.
This article is part of Lids & seals, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Product type: Stirrer seal
- Joint size: NS 29/32
- Shaft diameter: 10 mm
- Thread: GL 25
- Guide sleeve: PTFE
- Technical Information Sheet:
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Questions about Glass stirrer bearing, cone size 29/32, for stirring shaft Ø 10 mm, GL 25
What is this article?
Glass stirrer bearing, cone size 29/32, 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.
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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.