Bar and Gauge
Product Code : JA-PLE-4231
The Bar and Gauge (SKU JA-PLE-4231) illustrates the expansion of a metal on heating and its contraction on cooling. A mild steel bar on a rod with a wooden handle fits its cast metal gauge exactly when cold; after heating in a flame it no longer fits, and it fits again once it has cooled. This bar and gauge expansion apparatus is a standard demonstration in school science lessons on heat.
Specifications
The apparatus is a 110 x 10 mm mild steel bar on a rod with a wooden handle, about 280 mm long overall, and a cast metal gauge that is a sliding fit over the ends of the bar and has a 10 mm bore hole in one arm.
| Product | Bar and Gauge |
| SKU | JA-PLE-4231 |
| Bar | Mild steel, 110 x 10 mm (length x diameter) |
| Handle | Rod with wooden handle |
| Overall length | Approx. 280 mm |
| Gauge | Metal casting, sliding fit over the ends of the bar |
| Gauge hole | 10 mm bore in one arm |
| Purpose | Illustrating expansion by heating and contraction by cooling |
Applications of the bar and gauge expansion apparatus
The bar and gauge gives a clear yes-or-no result that a whole class can see: the cold bar slides into the gauge and through the 10 mm hole, but after heating it is too long and too thick to fit until it cools again.
- Demonstrating linear expansion of a metal bar on heating
- Demonstrating expansion in thickness with the 10 mm gauge hole
- Showing contraction of the bar as it cools
- Introducing expansion gaps in rails, bridges and pipelines
- Class 6-9 science and physics lessons on heat
Scope of supply and ordering
The listing covers the mild steel bar with rod and wooden handle and its cast metal gauge. A burner or other heat source is a separate item. Accessories, spares and quantities are confirmed on the quotation.
Minimum order quantity, lead time and packing are confirmed on each quotation according to the quantity and the delivery destination. JaincoLab supplies class sets for schools, bulk education-project orders and export consignments to buyers in Africa, the Middle East and South and South-East Asia.
Frequently asked questions
What size is the bar?
The mild steel bar is 110 x 10 mm, mounted on a rod with a wooden handle, about 280 mm long overall.
How does the gauge show expansion?
The gauge is a sliding fit over the ends of the cold bar and has a 10 mm hole; after heating the bar no longer fits either.
Related products
See more heat apparatus in Physics Lab Equipments from JaincoLab, a physics lab equipment manufacturer in India.
Request a quote
To order the Bar and Gauge, send the quantity and delivery destination through the JaincoLab contact page or email [email protected]. Institutions and contractors buying under a tender can also reach us via the tenders page.
