Inertia Disc

Product Code : LSK-AM-11088

Inertia Disc (SKU LSK-AM-11088) is a brass disc about 15 cm in diameter and 6 mm thick, with an arrangement for clamping a split chuck so it can hang from a wire as a torsion pendulum. Physics students time its twisting oscillations to work out moment of inertia and the rigidity of the wire. Built by Science Lab Supplies at its Saha, Ambala factory (Plot 448, HSIIDC Industrial Area, India), the disc is supplied directly to colleges, schools, tender contractors and distributors.

Specifications

The disc is brass, approximately 15 cm in diameter and 6 mm thick, and carries a fitting that clamps a split chuck at its centre for gripping the suspension wire. It is supplied without a wall bracket, so it is mounted on a bracket or support the laboratory already has.

Applications and Experiments for the Inertia Disc

The inertia disc is the oscillating mass of a torsion pendulum. Hung from a wire through its split chuck, it is twisted slightly and released, and the period gives either the moment of inertia or the rigidity modulus of the wire. It is standard physics lab equipment in India for undergraduate mechanics.

• B.Sc. physics: modulus of rigidity of a wire with a torsion pendulum.
• B.Sc. and B.Tech physics: moment of inertia of a disc from torsional oscillations.
• Showing how period depends on wire length and diameter.

Standard Scope of Supply

You receive the brass Inertia Disc, about 15 cm across and 6 mm thick, with its split-chuck clamping arrangement. A wall bracket is not included, and the suspension wire and a stopwatch are not part of the item; related supports can be listed on the quotation as optional extras.

Packing, MOQ and Lead Time

Get a quotation for a single disc or for enough discs to run a full torsion practical across several benches. The document shows packing, delivery time and price for that quantity, and any torsion pendulums or brackets you need can go on it too.

An Importer-Exporter Code allows Science Lab Supplies to ship to buyers in Nigeria, Kenya, Ghana, Ethiopia, Tanzania and Uganda. The business is registered under Udyam as a manufacturing enterprise (UDYAM-HR-01-0014546) and for GST (GSTIN 06ADEPJ0574F2ZU). To request prices, go to the contact page or enquiry cart; the lab tender page covers tenders.

Frequently Asked Questions

What are the dimensions of the Inertia Disc?
The brass disc is about 15 cm in diameter and 6 mm thick. It has a clamping arrangement for a split chuck, which grips the suspension wire at the centre.

Is a wall bracket included?
No. The disc is supplied without a wall bracket. Hang it from a rigid bracket or clamp already in the lab, or name the support you need on your enquiry.

How does it differ from the Torsion Pendulum?
The Torsion Pendulum in the same range is a fuller set with a 12.5 cm solid brass disc, a brass ring to increase moment of inertia, and a universal clamp. The Inertia Disc is the disc alone.

Is Science Lab Supplies the manufacturer or a trader?
The disc is a Science Lab Supplies product, made in its own factory in Saha, Ambala, India. Your quotation is prepared by the manufacturer, not by an agent.

Related Torsion and Inertia Apparatus

These four items from the applied mechanics range sit naturally beside the inertia disc. They include two complete torsion pendulums, an inertia table for irregular bodies and Maxwell's needle for rigidity, so a lab can compare several methods, and all can be quoted together.

• Torsion Pendulum — disc plus brass ring.
• Torsion Pendulum (Bridge Type) — U-shaped metal bridge support.
• Inertia Table — grooved aluminium disc on a frame.
• Maxwell Vibration Needle — brass tube with cylinders.

Browse the full Applied Mechanics range or all physics lab equipment.

Last updated: 25 September 2026