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Disk for the Balance of Moments
Disk for the Balance of Moments (Product Code: SCL-387/07) is a pivoted aluminium moment disk used to demonstrate the principle of moments and rotational equilibrium in school and college physics laboratories. The machined 245 mm disk turns smoothly on a ball bearing in a vertical plane, and its holes are set symmetrically in concentric circles so pins with scale pans can be placed at known distances from the axis. It is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM manufacturer, at its own factory in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Disk | Well-balanced machined aluminium disk, 245 mm diameter |
| Rotation | Turns smoothly about its axis on a ball bearing |
| Mounting | Clamped on a tripod stand in a vertical plane |
| Bases | Triangular base; base for balancing the device |
| Holes | Placed symmetrically in concentric circles |
| Load points | Four pins carrying scale pans, insertable in any hole |
| Weights | Box of 10 weights with heavy hooks (listed as 50 g x 100 g) |
| Product code | SCL-387/07 |
| Manufacturer | Jain Scientific Equipments Pvt Ltd (ScienceLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the Moment Disk Used For?
Students push pins into chosen holes, load the scale pans with weights and let the disk settle. Because the disk is balanced and turns freely on its bearing, it only stays still when the total clockwise moment equals the total anticlockwise moment, which students check by multiplying each load by its horizontal distance from the centre. The concentric rings of holes make those distances easy to read and repeat.
Placing a pin above or below the horizontal line through the axle shows that a moment depends on the perpendicular distance to the line of action, not on the straight-line distance to the hole. Before each run, check that the empty disk rests in any position; if it drifts, clean around the bearing and re-level the stand. This makes the disk a clear piece of physics practical equipment for lessons on levers, torque and equilibrium.
What to Specify When Ordering
- The number of disks for your laboratory or demonstration bench.
- The weight values you need — the hooked weights are listed as 50 g x 100 g, so confirm the mix with us.
- Whether you want spare pins or scale pans in addition to the four included.
OEM Manufacturer
The Disk for the Balance of Moments is an original ScienceLab product. Jain Scientific Equipments Private Limited, which trades as ScienceLab, is its OEM and makes it at the company's own licensed factory at Saha, Ambala, Haryana, India. Schools, colleges, dealers and importers deal with the manufacturer directly, so quotations, repeat orders and requests for replacement pins or scale pans come from the same team — ask us. More about the company is on the ScienceLab profile.
Related Laboratory Equipment
Other apparatus for teaching moments and equilibrium:
- Apparatus for Demonstrating the Moment of Force — measures balancing forces with dynamometers on a stand-mounted disk.
- Balance Demonstration Fulcrum/Lever — a straight lever for a first lesson on moments.
- Weight Box (Physical) — extra masses for loading the scale pans.
- Set of Dynamometers — spring balances for adding measured forces to the experiment.
More mechanics apparatus is listed under Laboratory Equipment.
Frequently Asked Questions
What is included with the Disk for the Balance of Moments?
The Disk for the Balance of Moments includes a 245 mm machined aluminium disk on a ball bearing, a triangular base, a base for balancing the device and a box of 10 weights with heavy hooks. Four pins carrying scale pans fit into the disk's holes.
What is the moment disk made of?
The Disk for the Balance of Moments is a well-balanced disk machined from aluminium, 245 mm in diameter. It rotates smoothly about its axis on a ball bearing and is clamped on a tripod stand in a vertical plane.
How are loads positioned on the moment disk?
On the Disk for the Balance of Moments, holes are placed symmetrically in concentric circles. Four pins carrying scale pans can be inserted into any hole, so loads can be set at different distances and angles from the axis.
How is the moment disk different from the Apparatus for Demonstrating the Moment of Force?
The Disk for the Balance of Moments balances loads using pins, scale pans and hooked weights alone, while the Apparatus for Demonstrating the Moment of Force adds dynamometers on a stand to measure the balancing force directly.
Who manufactures the Disk for the Balance of Moments?
The Disk for the Balance of Moments is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab) as the OEM, at its own factory at Saha, Ambala, Haryana, India, and is supplied factory-direct to schools, colleges, institutions and dealers.
Can the moment disk be ordered in quantity or for export?
Yes. The Disk for the Balance of Moments can be quoted for single laboratories or larger school orders across India and international markets. Share the code SCL-387/07, the quantity, the weight mix you need and your delivery location through the contact page.
Request a Quote
Ask for a quotation on the Disk for the Balance of Moments through the contact page or add it to the enquiry cart; quotes come directly from the manufacturer.
Last updated: 24 September 2026
