Brass Ring and Ball Apparatus
.jpg)
Product Code : SCL-AM-12106
Brass Ring and Ball Apparatus (SKU SCL-AM-12106) is a two-piece thermal expansion demonstration: a solid brass ball slips through a matching brass ring at room temperature, but sticks once the ball is heated. Teachers use it in school and introductory college heat lessons. The apparatus is manufactured by Science Lab Supplies in its own works at Plot 448, HSIIDC Industrial Area, Saha, Ambala, India, and the company quotes schools, colleges and distributors directly.
Specifications
Every technical detail of the apparatus is listed in the table below. In short, it is a solid brass ball of 25 mm nominal diameter and a solid brass ring whose inner diameter is matched to the ball at room temperature, each mounted on its own heat-insulating handle, about 300 mm long overall.
| Specification | Value |
|---|---|
| SKU | SCL-AM-12106 |
| Ball material | Solid brass |
| Ring material | Solid brass |
| Ball diameter | 25 mm (nominal) |
| Ring fit | Inner diameter matched to the ball's outer diameter at room temperature |
| Handles | Separate heat-resistant handle for the ball and for the ring |
| Handle material | Hardwood or heat-insulating polymer |
| Overall length | Approx. 300 mm |
| Surface | Brass alloy that resists oxidation and tarnishing |
| Documentation | Instructional guide with experiment steps |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Brass Ring and Ball Apparatus
The ring and ball is the standard first demonstration of thermal expansion in solids. Students see the cold ball pass, watch it jam after heating and pass again after cooling, linking kinetic theory to a visible change; it is a staple of school physics lab equipment in India.
- Class 7–9 science: heat and the expansion of solids, with the ball heated for one to two minutes over a Bunsen Burner (Pack of Two) or a Laboratory Spirit Burner.
- Class 11 physics: thermal properties of matter, an introduction to the coefficient of linear expansion.
- Contraction: the hot ball, dipped in cold water for about 10 seconds, slides through the ring again.
Hold the parts only by their handles; the heated brass must not be touched until it has cooled.
Standard Scope of Supply
Each apparatus comprises one solid brass ball mounted on an insulated handle, one solid brass ring mounted on an insulated handle, and an instructional guide that sets out the experiment steps. A burner, a beaker of cold water and a stand are not part of the set and can be quoted separately.
Packing, MOQ and Lead Time
Quotations can cover one demonstration set for a teacher or a set for every student group in the laboratory. For the quantity you name, Science Lab Supplies sets out packing, delivery time and price on the quotation, and burners or calorimeters can be added to it.
Science Lab Supplies holds an Importer-Exporter Code and is able to ship to buyers in the UAE, Saudi Arabia, Oman, the Philippines, Nepal and Bangladesh. To ask for a quote, use the contact page, add the item to the enquiry cart, or see the lab tender page for tender supply.
Frequently Asked Questions
How does the Brass Ring and Ball Apparatus show thermal expansion?
Heating gives the atoms in the brass ball more energy, so they take up more space and the ball grows slightly. Because the ring was matched to the cold ball, the heated ball now rests on the ring instead.
Why is brass used for the ball and ring?
Brass expands noticeably when heated and conducts heat well, so the ball warms through quickly over an ordinary laboratory flame and the effect shows within a minute or two, well short of melting.
What if the hot ball gets stuck in the ring?
If a heated ball is pushed hard into the ring, the ring warms and can grip it for a while. Leave both parts to cool to room temperature and they will then separate easily.
Is Science Lab Supplies the manufacturer or a trader?
It is the manufacturer. The ring and ball is produced in the company's Saha, Ambala factory in India, so every quotation for it is issued by the maker itself rather than passed on through a trading intermediary.
Related Heat and Thermal Expansion Apparatus
These items from the Heat and Applied Mechanics ranges cover other ring-and-ball patterns, the expansion of metal rods and of liquids, and calorimetry, so a complete set of thermal-physics demonstrations can be assembled around this apparatus and listed together on a single quotation for the laboratory.
- Ball and Ring Apparatus — captive 19 mm brass ball held to a mounted brass ring by a chain.
- Ball and Ring Apparatus (22 mm ball) — brass ball and ring on brass rods with wooden handles.
- Ring and Ball — metal ball and matching ring with handles, for expansion and contraction.
- Linear Expansion Apparatus — metal rod in a steam jacket with an expansion indicator; steam source not provided.
- Expansion of Liquid Apparatus — five graduated capillary tubes with bulbs, set in a hot-water trough.
- Copper Calorimeter Apparatus 3x2 — copper inner vessel in an outer container for the method of mixtures.
- Joule's Calorimeter — 5 x 7.5 cm copper calorimeter in a polished wooden outer vessel.
Browse the full Applied Mechanics range, the Heat range for expansion and calorimetry apparatus, or all physics lab equipment.
Last updated: 9 October 2026
.jpg)
.jpg)
.jpg)
