Disc to Demonstrate Equilibrium (Balance) Manufacturer,Supplier and Exporter in India

Disc to Demonstrate Equilibrium (Balance) (Product Code: SCL1213/05) is a 200 mm plastic disc that turns on a rotation axis and carries 18 attachment points – 2 mm holes or the same number of nails – laid out radially and symmetrically across its face. By hanging loads at different points, a teacher shows when a body that is free to rotate stays at rest: the turning effects on either side of the axis must cancel. Made by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, it works as a circular alternative to a moment bar apparatus in school physics.

Specifications

Typical Use

With the disc mounted on its axis, students hang masses from holes on opposite sides and adjust them until the disc stays still in any position they leave it. They then measure the perpendicular distance from the axis to the line along which each thread hangs and compare the sum of clockwise moments with the sum of anticlockwise moments. Because the attachment points lie on radial lines, the class quickly sees an important subtlety: a load hung from a point above or below the horizontal diameter has a shorter lever arm than one at the same radius on that diameter, so it is the perpendicular distance, not the distance along the radius, that counts.

Before loading, check that the empty disc turns freely and settles without a preferred position; otherwise friction or imbalance will mask the result. Light masses on fine thread give the cleanest readings. For teachers building a set of mechanics lab equipment in India, the disc complements straight levers by showing the same principle on a rotating body.

Manufacturer

The disc is manufactured by Jain Scientific Equipments Private Limited, the Ambala, Haryana company behind the ScienceLab name, which designs demonstration apparatus for teaching mechanics and other physics topics. The company is a registered MSME enterprise (Udyam UDYAM-HR-01-0003714) and handles overseas shipments under Importer-Exporter Code AAECJ8618A issued by the DGFT. Further background is on the ScienceLab profile page.

Related Lab Equipment

To run a complete moments and equilibrium lesson, these items are often ordered with the disc:

• Set Of Marked Masses — known loads to hang from the holes or nails.
• Stand — a support for the rotation axis during the demonstration.
• Dynamometer — to apply and read a measured pulling force instead of a hanging mass.
• Lever — the straight-bar version of the principle of moments, for comparison.
• Deformable Parallelepiped — extends the topic to the balance of bodies standing on a base.

Browse all items in our Lab Equipment category.

Frequently Asked Questions

Does the disc come with holes or with nails?
It is specified with 18 holes of 2 mm diameter or the same number of nails. Tell us which version suits your lesson when you enquire and we will confirm it in the quotation.

Are masses included?
The specification covers the disc with its rotation axis and attachment points; masses are not listed. A Set Of Marked Masses can be ordered alongside it.

Which topics does it support?
The principle of moments, the conditions for equilibrium of a body with a fixed axis, and the idea of the perpendicular lever arm.

How is the axis supported during a demonstration?
The disc turns on its rotation axis, which is normally held on a laboratory support. If you need a particular mounting arrangement, please discuss it with us through the contact page.

How do I keep the plastic disc in good condition?
Keep it away from heat sources, clean it with a damp cloth, and store it flat so the disc does not warp.

Can you supply multiple units for student groups or export?
Yes. We quote class sets and bulk orders for schools, colleges and distributors in India and international markets.

Request a Quote

For a price on the Disc to Demonstrate Equilibrium (Balance), send your quantity through our contact page or add it to the enquiry cart with the masses and supports you need.

Last updated: 24 September 2026