Pendulum Bobs (18mm) Manufacturer,Supplier and Exporter in India
Product Code : EL-SLE-4672
Jlab Export is a leading Pendulum Bobs (18mm) Manufacturer,and suppliers in India
Pendulum Bobs (18mm) (code EL-SLE-4672) are 18 mm spherical bobs with a hook attached for suspension, made for simple pendulum experiments in school and college physics labs. They are offered in brass or in chrome-plated iron and are finely polished for a lasting shine. They are made by Jain Laboratory Instruments Pvt Ltd (JLab) at its works in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Shape | Spherical |
| Diameter | 18 mm |
| Radius (half the diameter, for effective-length working) | 9 mm |
| Material | Brass, or iron with chrome plating |
| Suspension | Hook attached to the bob |
| Finish | Finely polished, long-lasting shine |
| Use | Pendulum experiments |
| Quality check | Each bob 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-4672 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
How Does It Compare with Other JLab Pendulum Bobs?
| Model | Size | Material | Suspension and finish |
|---|---|---|---|
| These bobs (EL-SLE-4672) | 18 mm diameter | Brass or chrome-plated iron | Hook attached; finely polished |
| Pendulum Ball 19 mm | 19 mm | Not stated (solid sphere) | Small hook for suspension |
| Brass Pendulum Bobs | Not stated | Brass | Small hook for suspension |
| Pendulum Bobs or Spheres | Different diameters | Brass, aluminium, copper, zinc, iron, lead, or wood and plastic | Solid sphere with hook |
Choose these 18 mm bobs when a practical sheet calls for a small metal bob of known size. Pick the bobs-or-spheres listing when you want a set of materials to show that the period does not depend on the mass of the bob.
What Are Pendulum Bobs Used For?
A bob is the weight at the end of a simple pendulum. A small, heavy sphere keeps the mass at the end of the thread, far from the point of suspension, so the set-up behaves closely like an ideal simple pendulum. Middle-school students use it to time oscillations and see how the period changes with length, and in class 11 physics practicals it is used to plot L–T and L–T² graphs and find the effective length of a seconds pendulum. Students also measure the bob’s diameter with vernier callipers as a separate practical.
The effective length is measured from the point of suspension to the centre of the bob. With these bobs, add the hook length and the 9 mm radius to the length of thread measured from the point of suspension to the hook. Tie the thread firmly to the hook, clamp it in a split cork or pendulum clamp, keep the swing small, and time several complete oscillations with a stopwatch before dividing by their number. Wipe the bobs dry after use so the polish lasts.
What to Specify When Ordering
- Material — brass or chrome-plated iron; a mix of both lets students compare bobs of different materials at the same size.
- Quantity — the minimum order is 10 units; many labs order one bob per student group plus spares.
- Stand and clamp — pendulum clamps, stopwatches and vernier callipers are separate items and can be added to the same enquiry.
Frequently Asked Questions
What size are these pendulum bobs?
18 mm in diameter, which gives a radius of 9 mm to add when working out the effective length of the pendulum.
What materials are they made of?
They are listed in brass or in iron with chrome plating. Both are spherical, have a hook for suspension and are finely polished.
Does a brass bob give a different period from an iron bob?
No, not for the same effective length and a small swing. The period of a simple pendulum depends on its length and on gravity, not on the mass of the bob, and comparing the two materials is a quick way to show this.
Is the thread or a stand included?
The listing covers the bob with its hook. Thread, clamp, stand and stopwatch are not part of it; JLab lists a pendulum clamp, stopwatches and vernier callipers separately.
What information is needed for an export quotation?
Send the quantity of each material, the destination country and port or city, your preferred delivery terms (for example FOB or CIF), any packing or labelling needs, and the tender reference if you are buying against a tender.
Who manufactures these pendulum bobs?
Jain Laboratory Instruments Pvt Ltd (JLab) makes them at its works in Ambala, Haryana, India, and quotes for them directly as the manufacturer.
OEM Manufacturer
JLab is the trading name of Jain Laboratory Instruments Pvt Ltd, a mechanics and physics lab equipment manufacturer in India, incorporated in 2017 and based on Hargolal Road, Ambala, Haryana. These bobs are made and polished at JLab’s own works rather than bought in from a trader, so schools, colleges, dealers and importers buy them factory-direct, every bob is visually checked before packing, and repeat orders come straight from the manufacturer. The company holds MSME Udyam registration UDYAM-HR-01-0003849 (manufacturing enterprise) and Importer-Exporter Code 3317504552. JLab exports worldwide and ships to buyers in every region — for example Mongolia in East Asia, Saudi Arabia in the Middle East, Sudan in North Africa, Kenya in East Africa and New Zealand in Oceania. Tender buyers can see the JLab lab tenders page.
Pendulum Experiment Accessories
- Pendulum Clamp — suspends three pendulums at one time from a rigid support arm, each with its own thumbscrew.
- Stop Watch — a digital stopwatch for timing oscillations.
- Vernier Calliper — a chrome-plated steel calliper for measuring the bob diameter.
- Pendulum Bobs or Spheres — solid spheres with hooks in several metals and non-metals.
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), the material you need, any clamps or stopwatches, and your delivery location through the contact page.
Last updated: 4 October 2026
