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Pulley, Plastic, Triple, Parallel
Pulley, Plastic, Triple, Parallel (Product Code: SLE/PHY/281) is a pulley block with three 50 mm plastic pulleys mounted in parallel in a metal frame with two hooks, used for high-ratio block-and-tackle experiments in physics laboratories. When two blocks are used together, students can build systems with six supporting strings and see mechanical advantage rise with every added segment. It is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM manufacturer, at its own factory in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Type | Triple, parallel |
| Pulleys | Three, plastic, 50 mm diameter |
| Frame | Metal, with two hooks |
| Product code | SLE/PHY/281 |
| Manufacturer | Jain Scientific Equipments Pvt Ltd (ScienceLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the Triple Pulley Block Used For?
A triple block is the step up from single and double pulleys when students investigate how mechanical advantage depends on the number of supporting strings. Two triple blocks give a six-string tackle, and one triple with a double gives five. Measuring effort and distance moved for each arrangement shows that the effort falls as the length of string pulled grows, and that friction lowers efficiency as more wheels are added.
Keep the strings in order when rigging: work from the fixed block to the moving block one wheel at a time so that segments do not cross. Younger students find rigging easier if each wheel is marked with a small dot of colour. The plastic wheels keep the moving block’s own weight low, which helps when efficiency is calculated, and make this a useful addition to any set of mechanics lab equipment.
What to Specify When Ordering
- Number of triple blocks; two per group give a six-string tackle.
- Double or single pulleys to combine with it.
- Masses, hangers, a spring balance and a rigid support.
OEM Manufacturer
The Pulley, Plastic, Triple, Parallel is manufactured by Jain Scientific Equipments Private Limited, which trades as ScienceLab and is the OEM for its pulley range. Production takes place at the company’s own licensed factory at Saha, Ambala, Haryana, India, and the blocks are supplied direct to schools, colleges, laboratory dealers and importers. Extra blocks or replacements for an existing class set can be requested from the manufacturer; just ask us. Read more on the ScienceLab profile.
Related Laboratory Equipment
Items used with the triple block:
- Pulley, Plastic, Double, Parallel — a two-wheel block for five-string systems.
- Pulley, Metal, Single, Parallel — a single wheel for simpler comparisons.
- Pulley, Plastic Double, with Ball Bearings — in-line plastic pulleys on ball bearings.
- Hangers with Slotted Weights — loads for the moving block.
- Force Meter/Spring Balance — measures the effort.
Visit the Physics Lab Equipment category for more mechanics apparatus.
Frequently Asked Questions
How many pulleys does the Pulley, Plastic, Triple, Parallel have?
The Pulley, Plastic, Triple, Parallel has three plastic pulleys of 50 mm diameter mounted in parallel in a metal frame with two hooks, so it can act as either the fixed or the moving block of a pulley system.
What mechanical advantage can be shown with the triple pulley?
Two Pulley, Plastic, Triple, Parallel blocks give six supporting string segments, an ideal mechanical advantage of six, and one triple with a double gives five. Measured values are lower because of friction, which lets students calculate efficiency.
What else is needed with the Pulley, Plastic, Triple, Parallel?
The Pulley, Plastic, Triple, Parallel needs a rigid support, string, a second pulley block, masses with a hanger and a spring balance. These items are listed separately, so add them to your enquiry to receive a single quotation.
What is the maximum load for the triple pulley?
A load rating for the Pulley, Plastic, Triple, Parallel is not stated in this listing. Tell us the heaviest mass your experiments use through the contact page, and we will confirm suitability before you order.
Who manufactures the Pulley, Plastic, Triple, Parallel?
The Pulley, Plastic, Triple, Parallel is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), the OEM, at its own licensed factory at Saha, Ambala, Haryana, India, and quoted factory-direct to schools, colleges, dealers and importers.
Can the triple pulley be ordered in class sets?
Yes. The Pulley, Plastic, Triple, Parallel can be quoted in class quantities, usually two blocks per group, for schools, colleges, dealers and importers in India and international markets. Send the quantity and destination through our contact page or enquiry cart.
Request a Quote
For a Pulley, Plastic, Triple, Parallel quotation direct from the manufacturer, write through the contact page or add the block to the enquiry cart.
Last updated: 24 September 2026
