Ball and Ring Apparatus
Product Code : LSK-PL-10328
Ball and Ring Apparatus (SKU LSK-PL-10328), also called Gravesande's ring, is a two-piece demonstration of the thermal expansion of solids. A brass ball that passes through a brass ring at room temperature no longer fits once it is heated, and slips through again as it cools. It suits Class 7–11 heat lessons. The two-piece set is manufactured by Science Lab Supplies at its Plot 448, HSIIDC Industrial Area unit in Saha, Ambala, India, which quotes schools, colleges, tender contractors and distributors directly.
Specifications
Ball, ring, rods and handles of the expansion set are listed one per row below. In short, a brass ball and a brass ring are each mounted on their own brass rod fitted with a wooden handle, so both parts can be held while the ball is heated, and the ball measures 22 mm in diameter.
| Specification | Value |
|---|---|
| SKU | LSK-PL-10328 |
| Pieces | Two-piece apparatus |
| Ball | Brass |
| Ball diameter | 22 mm |
| Ring | Brass |
| Mounting rods | Brass rod for each part |
| Handles | Wooden handle on each rod |
| Demonstrates | Thermal expansion |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Ball and Ring Apparatus
The apparatus shows that solids expand when heated and contract on cooling. Pass the cold ball through the ring, heat the ball in a flame, for example from a Brass Spirit Lamp 100ml, and show that it now rests on the ring, then let it cool until it drops through.
- Class 7 science (heat): observing expansion of a solid on heating.
- Class 11 physics (thermal properties of matter): introducing linear and volume expansion before coefficients are measured.
- Heating the ring instead of the ball to show that the hole also expands.
Heated brass stays hot for some time; hold the parts by their wooden handles and demonstrate under teacher supervision.
Standard Scope of Supply
Each apparatus consists of two parts: the 22 mm brass ball on a brass rod with a wooden handle, and the brass ring on its own rod and handle. A burner or spirit lamp for heating can be quoted on request alongside the set, and further sets can be added so each class has its own demonstration.
Packing, MOQ and Lead Time
A quotation can cover one demonstration set or one for every classroom, and states the packing, delivery time and price for the number requested. Bimetallic strips, burners and other heat and thermodynamics lab equipment can be combined on that quotation.
As a registered exporter with an Importer-Exporter Code, Science Lab Supplies is able to ship to buyers in Nepal, Bangladesh, Zambia, Rwanda, South Africa and Qatar. The business is registered under Udyam as a manufacturing enterprise (UDYAM-HR-01-0014546) and for GST (GSTIN 06ADEPJ0574F2ZU). Heat-unit requirements can be sent on the contact page or listed item by item in the enquiry cart, and the lab tender page covers formal tender supply.
Frequently Asked Questions
What does the Ball and Ring Apparatus demonstrate?
It demonstrates the thermal expansion of solids: the heated brass ball becomes too large to pass through the ring, and passes through again once it cools.
What size is the ball, and what is it made of?
The ball is brass with a diameter of 22 mm. It sits on a brass rod with a wooden handle, and the brass ring is mounted the same way on its own rod.
Is Science Lab Supplies the manufacturer or a trader?
Brass ball-and-ring sets of this pattern are made by Science Lab Supplies in its own Saha, Ambala factory in India; as manufacturer, it prepares the quotation and dispatches the order itself.
What is needed to heat the ball?
The set is the ball and ring. A laboratory burner such as the Bunsen Burner (Pack of Two) or a spirit lamp can be used for heating, always under supervision.
Related Thermal Expansion and Conduction Apparatus
Seven further heat demonstrations sit well beside this set: two other ball-and-ring designs, a steam-jacket linear expansion rig, a bimetal strip, a bar-breaking frame, and two ways to compare how well different metals conduct heat, giving a complete heat unit on one quotation.
- Ball and Ring Apparatus (19 mm, chained) — captive 19 mm brass ball secured to a mounted brass ring by a chain.
- Brass Ring and Ball Apparatus — brass ball and ring on independent heat-resistant handles.
- Linear Expansion Apparatus — metal rod in a steam chamber with an expansion indicator; steam source not provided.
- Bimetallic Strip — riveted brass and steel strip on a wooden handle that curves in a flame.
- Bar Breaking Apparatus — heavy cast iron frame with a stout iron bar and a cast iron breaking bar.
- Conductometer, For Thermal Conductivity — five metal rods on a brass hub, compared by melting wax.
- Conductivity Ring — copper, brass, steel and aluminium strips mounted on a ring.
Browse the full Physics Lab range, the Heat range for expansion and conductivity apparatus, or all physics lab equipment.
Last updated: 22 October 2026
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