Schott Duran test tube
Product number:
41616
Product information "Schott Duran test tube"
Very thick-walled test tubes made of Duranglas for the construction of Stirling engines or similar applications in technical model construction. The Schott Duran test tubes are mechanically very resistant. Excellent resistance to temperature changes means that you can also use the test tubes as a displacement cylinder for a Stirling engine without worrying that the glass will burst. You can cut the test tubes with our diamond cutting discs. Below you will find a tutorial video.
The test tubes are also suitable for laboratory and medical applications.
We carry the Duran test tubes in these different sizes:
- Schott Duran test tube 10mm x 100mm 5ml (actual size: 9,5mm diameter / 100mm long / inside 7,8mm
- Schott Duran test tube 12mm x 100mm 8ml (actual size: 11,5mm diameter / 100mm long / inside 9,8mm
- Schott Duran test tube 16mm x 130mm 17ml (actual size: 15,5mm diameter / 130mm long / inside 13,5mm (Stirling engine Laura)
- Schott Duran Test tube 18mm x 180mm 32ml (actual size: 17,5mm diameter / 180mm long / inside 15,4mm (Stirling engine Rufus)
- Schott Duran Test tube 25mm x 150mm 55ml (actual size: 24,5mm diameter / 150mm long / inside 22,3mm
- Schott Duran test tube 30mm x 200mm 100ml (actual size: 29,5mm diameter / 200mm long / inside 27,2mm
The test tubes available from Schott are made of Duranglas. All test tubes have a flanged edge and a wall thickness of 1.0mm - 1.2mm. Please note that the test tubes do not have the dimensions specified by the manufacturer, but a tolerance of + - 0,5mm. Please note the actual dimensions given by us.
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Schott Duran test tube
€4.00*
Very thick-walled test tubes made of Duranglas for the construction of Stirling engines or similar applications in technical model construction. The Schott Duran test tubes are mechanically very resistant. Excellent resistance to temperature changes means that you can also use the test tubes as a displacement cylinder for a Stirling engine without worrying that the glass will burst. You can cut the test tubes with our diamond cutting discs. Below you will find a tutorial video.
The test tubes are also suitable for laboratory and medical applications.
We carry the Duran test tubes in these different sizes:
Schott Duran test tube 10mm x 100mm 5ml (actual size: 9,5mm diameter / 100mm long / inside 7,8mm
Schott Duran test tube 12mm x 100mm 8ml (actual size: 11,5mm diameter / 100mm long / inside 9,8mm
Schott Duran test tube 16mm x 130mm 17ml (actual size: 15,5mm diameter / 130mm long / inside 13,5mm (Stirling engine Laura)
Schott Duran Test tube 18mm x 180mm 32ml (actual size: 17,5mm diameter / 180mm long / inside 15,4mm (Stirling engine Rufus)
Schott Duran Test tube 25mm x 150mm 55ml (actual size: 24,5mm diameter / 150mm long / inside 22,3mm
Schott Duran test tube 30mm x 200mm 100ml (actual size: 29,5mm diameter / 200mm long / inside 27,2mm
The test tubes available from Schott are made of Duranglas. All test tubes have a flanged edge and a wall thickness of 1.0mm - 1.2mm. Please note that the test tubes do not have the dimensions specified by the manufacturer, but a tolerance of + - 0,5mm. Please note the actual dimensions given by us.
Variants from €3.40*
diamond cutting disc
€2.40*
The cutting discs with electroplated diamond coating are ideal for cutting glass tubes or test tubes to bring length. If you are building a Stirling model this is essential. The diamond cutting discs fit the mandrels from Proxxon and Dremel high-speed grinders.
The mandrel is not included!!!
Dimensions of the diamond cutting disc
Location hole: 2mm
Diameter: 22mm
Carrier thickness: 0.2mm
Thickness of the diamond cutting disc perforated with coating: 0.5mm
Thickness of the diamond cutting disc, unperforated with coating: 0.4mm
Order the disc carrier with 2.35mm diameter with screw at the same time. The mandrel for the diamond cutting disc has a reinforced shaft for better concentricity.
Variants from €1.90*
graphite round material
€7.30*
This graphite round material is excellent for making pistons for flame emitters and Stirling engines. A graphite piston does not need to be lubricated since it is self-lubricating. The graphite and material can be machined as well as a porous plastic. Another area of application of graphite is the production of high temperature resistant gaskets. Mainly, however, the material is used for self-lubricating the bearings in the model or mechanical engineering. However, the mechanical strength is not as high as for example in bronze.
Very good turning and milling properties.
Tolerances of Graphite Round Bars Diameter 0 / + 0.2mm
Graphite round material can still be used for the following applications:
Graphite as a material for self-lubricating bearings
For the production of high temperature resistant seals
For the production of molds
Graphite is used as a carbon brush in electric motors
The following dimensions are available:
Graphite round material 15mm round material 16mm long
Graphite round material 20mm diameter 21mm long
Graphite round material 25mm diameter 26mm long
Graphite round material 30mm diameter 31mm long
Graphite round material 40mm diameter 41mm long
Graphite round material 50mm diameter 49mm long
If you order two or more graphite pieces of a diameter, you get only one cut.
(e.g., 2x 20mm diameter 21mm long = 1 piece x 42mm)
Tip
high-alloyed silver solder 1mm / 1,5mm
€4.70*
We have silver braided bars with a silver content of 55% (L-Ag55) with a length of 500mm. Because of the relatively low melting point of this silver braze, the model builder in the field of technical model building is almost exclusively concerned. The working temperature of this hard solder is 630 ° C. The silver as an alloying component in the solder does not only reduce the working temperature, but also improves the flow properties. Furthermore, silver has the positive property of combining well with other metals. For brazing brass and steel, silver solder flux is essential. The low working temperature of the silver solder bars allows the thermal load to be as low as possible for the processed material. It is important not to heat the workpieces too much, especially in the case of brass. In combination with our silver solder flux you achieve with these silver solder always optimal results.
The silver braided bars can be purchased from us in the shop in 2 different diameters. For fine soldering as it often happens in technical model construction we recommend the 1mm rods. The 1mm silver braided bars are easy to carry with the hand and can be easily melted with small burners. For larger parts we prefer the 1.5 mm silver solder bars. With these rods you get faster material to the soldering point if needed. What can be brazed?The following materials can be combined with silver solder: brass, copper, gunmetal, gray cast iron, rusting steels and stainless steel. A combination of the materials among each other is easily possible with this silver braze solder. If the material is not known to you, it is always recommended to solder a piece to the sample beforehand. This allows you to determine whether the materials can be combined with the silver braze.Instructions Brazing with silver solder
If you have never worked on silver solder and you are not sure how the exact solder brazing procedure is with silver solder, we can help you before you buy the silver solder. We have created a guide for you in our Bengs Modellbaumagazin on the topic "Brazing with silver solder". Here you can find out what you need and have to consider if you want to solder 2 components with silver solder.
Tip: Flux residues and discoloration of the material can be optimally eliminated with our satin brushes or abrasive fleece!Characteristics of the silver solder bars500 mm long.
1mm or 1.5mm diameter
Silver solder bars L-Ag55 (55% silver)
Working temperature 630 ° C
Bengs Modellbau has used this silver solder bars for years.