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Spring Unit
Spring Unit (Product Code: SLE/PHY/302) is an energy-transfer module used to show how potential energy stored in a wound-up clock spring is converted into electrical energy in school physics lessons. Part of the Energy Transfer Kit, it has a clock spring, free-wheel, winding ratchet and 56 mm aluminium V pulley on a steel shaft, on a 165 x 100 mm base. This physics demonstration kit unit is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM manufacturer, at its own factory in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Energy conversion shown | Potential energy in a wound-up spring to electrical energy |
| Spring | Clock spring carried on a steel shaft |
| Mechanism | Free-wheel device and winding ratchet |
| Pulley | Aluminium V pulley, 56 mm diameter |
| Base size | 165 x 100 mm (common to all Energy Transfer Kit units) |
| Kit connections | Energy Transfer Kit units have 4 mm socket terminals where appropriate |
| Included | Driving belt |
| Second use | Winding a weight on a cord to show potential-to-kinetic energy changes |
| Product code | SLE/PHY/302 |
| Manufacturer | Jain Scientific Equipments Pvt Ltd (ScienceLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the Spring Unit Used For?
Students wind the clock spring with the ratchet, storing elastic potential energy, and then release it so the free-wheel lets the spring turn the shaft and pulley. With the driving belt linking the pulley to another unit of the Energy Transfer Kit, the stored energy ends up as electrical energy, and the class can trace each step of the chain from spring to belt to output. Because every unit shares the same 165 x 100 mm base, the modules sit neatly in a row on the bench.
The unit also works on its own: attach a cord to the pulley and let the spring wind a small weight upward. The raised weight gains potential energy, which turns into kinetic energy as it falls and can be stored again when it is wound back up. Wind the spring gradually rather than forcing it, and keep the belt at moderate tension so it does not slip or strain the shaft.
What to Specify When Ordering
- How many Spring Units you need per lab group.
- Which other Energy Transfer Kit units you want, since each is available separately.
- Whether you need extra driving belts; ask us about spares.
OEM Manufacturer
Jain Scientific Equipments Private Limited, the company behind the ScienceLab name, is the OEM (original equipment manufacturer) of the Spring Unit. The unit is made and assembled at the company's own licensed factory at Saha, Ambala, Haryana, India, so buyers deal with the maker rather than a trading intermediary. Schools, colleges, dealers and importers in India and international markets can ask the manufacturer directly about repeat orders, belts and other replacement parts. See our company profile for background.
Related Physics Lab Equipment
Other units and accessories that build out the same energy-transfer demonstrations:
- Handwheel Drive Unit — hand-driven input unit from the same Energy Transfer Kit.
- Line Shaft Unit — shaft-and-pulley module from the same kit for transmitting motion.
- Mounted Solar Cell — kit unit showing light energy converted to electrical energy.
- Newton Mass Set 1N Set — small masses for the weight-on-a-cord demonstration.
Explore the wider range in Physics Lab Equipment.
Frequently Asked Questions
What energy change does the Spring Unit demonstrate?
The Spring Unit demonstrates the conversion of potential energy stored in a wound-up clock spring into electrical energy, when its pulley is belted to another Energy Transfer Kit unit. It can also show potential energy changing to kinetic energy and back in a raised weight.
Is the Spring Unit compatible with other Energy Transfer Kit units?
Yes. The Spring Unit is one of the separately available units of the Energy Transfer Kit, and all units in the kit share the same 165 x 100 mm base size. Tell us which other units you plan to combine it with.
What is included with the Spring Unit?
The Spring Unit comes complete with a driving belt. The clock spring, free-wheel device, winding ratchet and 56 mm aluminium V pulley are mounted on its steel shaft; other kit units are ordered separately.
Can the Spring Unit be used without the rest of the kit?
Yes. On its own, the Spring Unit can wind a weight on a cord, so students see the raised weight gain potential energy and then convert it to kinetic energy as it falls. Linking to electrical output needs another kit unit.
Who manufactures the Spring Unit?
The Spring Unit is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), the OEM, at its licensed factory at Saha, Ambala, Haryana, India. Enquiries about belts, replacement parts and repeat orders go directly to the manufacturer.
What does a quotation for the Spring Unit need?
A quotation for the Spring Unit needs the number of units, any other Energy Transfer Kit units you want with it, and the delivery location in India or abroad. Send these through the contact page and we will reply with a manufacturer quotation.
Request a Quote
Request a quotation for the Spring Unit through our contact page, or add it and any companion units to the enquiry cart. Quotes are issued direct by the manufacturer.
Last updated: 24 September 2026
