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If you manufacture V-belts, you already know they don’t get much attention until something goes wrong. A belt slips. Power drops. Machines slow down. Someone starts checking motors, pulleys, alignment only later does the belt get blamed.
Because this happens often, and because low-quality belts cause repeated failures, BIS stepped in long ago. General purpose endless V-belts are not treated as casual components. They are regulated. If your product fits under IS 2494 (Part 1): 1994, BIS expects certification. Not suggestions. Compliance.
This is where ISI registration comes in.
General purpose does not mean unimportant.
These endless V-belts are used across industries where machines run daily, sometimes nonstop. They are not meant for explosive zones or fire-risk environments, but they still carry load, transfer torque, and affect efficiency.
You’ll see them in:
A belt that stretches too early or loses grip causes downtime. That costs money. BIS regulates this category to avoid exactly that.
IS 2494 is the Indian Standard for V-belts.
Part 1 applies only to general purpose endless V-belts.
This part of the standard focuses on very basic things, but those basics matter:
BIS is not testing innovation here. It is testing reliability.
Yes. There is no alternate interpretation.
If your product falls under IS 2494 (Part 1): 1994, you cannot sell it legally in India without ISI certification.
This applies to:
BIS has notified this category under compulsory certification. Selling without ISI can lead to seizure, penalties, or both.
If you are connected to the product commercially, BIS considers you responsible.
That includes:
If you are outside India, you must appoint an Authorized Indian Representative (AIR). BIS will not proceed without one.
Testing is straightforward but strict.
Your belt must be tested only at a BIS-recognised laboratory. BIS does not accept reports from private labs, even if they are technically capable.
Tests generally look at:
If one parameter fails, BIS does not “adjust.” The application pauses or ends.
Many manufacturers underestimate this part.
BIS does not certify samples alone. It certifies your ability to manufacture consistently.
You will need documents that explain:
During inspection, BIS officers compare documents with reality. Mismatch causes delay.
BIS ISI Certificate for Paver Blocks: IS 15658
This is how it usually plays out, without theory.
Step 1: You confirm that your belt falls under IS 2494 (Part 1): 1994.
Step 2: You submit the ISI application through the BIS portal.
Step 3: Samples are sent to a BIS-recognised lab for testing.
Step 4: A BIS officer visits your factory. Machinery, process, and testing setup are checked.
Step 5: BIS reviews inspection notes and lab reports together.
Step 6: If everything matches the standard, the ISI licence is issued.
After this, BIS may still inspect again. Certification is not a one-time event.
The licence is usually valid for one or two years.
Renewal is not automatic. BIS checks whether:
Sometimes fresh testing is required. Sometimes inspection repeats.
This is not just paperwork.
ISI certification:
Many buyers will not even evaluate non-ISI belts anymore.
Delays happen for predictable reasons:
Most of these are avoidable.
If you manufacture or sell general purpose endless V-belts, ISI certification under IS 2494 (Part 1): 1994 is mandatory. It protects buyers, improves product consistency, and keeps you compliant with BIS regulations.
The regsitrartion process can be complex when you are new. If you want the process handled cleanly and correctly, reach out to Agile Regulatory for structured support with your ISI Mark registration.
Nishi Chawla
22 Jan, 2026
Nishi Chawla
20 Jan, 2026
Nishi Chawla
20 Jan, 2026
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