Variable Inertia Steel Bar Manufacturer,Supplier and Exporter in India
Product Code : EL-SLE-5753
Jlab Export is a leading Variable Inertia Steel Bar Manufacturer,and suppliers in India
Variable Inertia Steel Bar (code EL-SLE-5753) is a 790 × 13 mm steel bar used to demonstrate how the torque needed to accelerate a flywheel changes as its inertia is varied, in rotational mechanics lessons in senior school and college physics labs. It makes the rotational form of Newton’s second law something students can feel and measure. It is made by Jain Laboratory Instruments Pvt Ltd (JLab) at its works in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Material | Steel |
| Listed size | 790 × 13 mm |
| Purpose | Demonstrating the variation in torque required to accelerate a flywheel as inertia is varied |
| Quality check | Each bar is visually inspected before dispatch |
| Pack quantity | Each (sold individually) |
| Minimum order quantity | 10 units |
| Dispatch time | Usually 7–10 working days |
| Product code | EL-SLE-5753 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
How Does It Compare with Other JLab Rotational Inertia Apparatus?
| Model | Size | Listed details |
|---|---|---|
| This steel bar (EL-SLE-5753) | 790 × 13 mm | Variable inertia; shows the torque needed to accelerate a flywheel as inertia changes |
| Inertia Bar | 25 cm long | Removable screwed discs at the ends; split chuck can be screwed in the middle or at either end |
| Flywheel Apparatus | 250 × 30 mm steel flywheel | Self-contained, wall-mounted, on ball bearings, with weights, load hanger, cord and stopwatch; for the second law of motion and energy storage |
Choose this bar for a long-arm demonstration of how inertia affects the torque needed; the short inertia bar changes its inertia with removable end discs, and the flywheel apparatus is a complete wall-mounted set for measured experiments.
What Is the Variable Inertia Steel Bar Used For?
In rotation, torque plays the part of force and moment of inertia plays the part of mass: the torque needed equals the moment of inertia multiplied by the angular acceleration. Moment of inertia depends not only on how much mass a body has but on how far that mass lies from the axis, so the same bar becomes much harder to spin up when mass is moved towards its ends. Turning or accelerating the bar as a flywheel at different inertia settings shows students directly that a larger moment of inertia demands a larger torque for the same angular acceleration.
The bar supports the rotational motion topics of class 11 physics and first-year college mechanics, and the flywheel idea it illustrates carries over to engine and machine courses in engineering and ITI workshops. Mount it securely before spinning it, keep students clear of the swept circle, and build up speed gradually.
What to Specify When Ordering
- Quantity — the minimum order is 10 units.
- Mounting and inertia adjustment — ask JLab to confirm how the bar is mounted and how its inertia is varied, which this listing does not state.
- Related apparatus — the flywheel apparatus or inertia bar can be quoted on the same enquiry.
Frequently Asked Questions
What does the variable inertia steel bar demonstrate?
That the torque needed to accelerate a flywheel rises as its moment of inertia rises. It is the rotational counterpart of a heavier trolley needing a larger force for the same acceleration.
What size is the bar?
It is listed as a steel bar of 790 × 13 mm.
How is the inertia varied?
The listing does not describe the mechanism. In general, moving mass farther from the axis of rotation increases the moment of inertia; confirm with JLab how this bar is set up before ordering.
How does it differ from the Inertia Bar?
This bar is listed at 790 × 13 mm in steel. The Inertia Bar is 25 cm long, with removable screwed discs at the ends and a split chuck that can be fixed in the middle or at either end.
Who manufactures this steel bar?
Jain Laboratory Instruments Pvt Ltd, trading as JLab, makes it at its works in Ambala, Haryana, India, and quotes for it directly as the manufacturer.
OEM Manufacturer
JLab is the trading name of Jain Laboratory Instruments Pvt Ltd, a physics and mechanics lab equipment manufacturer in India, incorporated in 2017 and based on Hargolal Road, Ambala, Haryana. The bar is made in JLab’s own works rather than bought from a trader, so schools, colleges, dealers and importers order it factory-direct; each bar is inspected by eye before dispatch, and repeat orders are handled by the manufacturer. JLab exports worldwide and ships to buyers in every region — for example Croatia in Southern Europe, South Korea in East Asia, Iceland in Northern Europe, the Czech Republic in Eastern Europe and Germany in Western Europe. Tender buyers can refer to the JLab lab tenders page.
Related Inertia Apparatus
- Inertia Balance — explains inertial mass with three removable masses, the linear counterpart of this demonstration.
- Inertia Bar — a short bar with removable end discs.
- Flywheel Apparatus — a self-contained steel flywheel set with weights and stopwatch.
See the full School Lab Equipment range for more mechanics apparatus.
Request a Quote
Quotes come direct from the manufacturer. Use the Add To Cart enquiry button on this page, or send the quantity (minimum 10 units), any mounting details you need confirmed and your delivery location through the contact page.
Last updated: 4 October 2026
