Diamond Triple Standard Chain Supplier in Kolkata & India — Allied Industrial Corporation

These chains are designed for use in mechanical power transmission systems.

A Triple Standard Chain — also called a Triple Strand Roller Chain, Triplex Chain, or 3-strand chain — is a multi-strand power transmission chain formed by joining three parallel simplex roller chains side by side, sharing common connecting pins across all three strands. The result is a chain that delivers approximately three times the load capacity of an equivalent single-strand simplex chain at the same pitch, within a drive layout that keeps the sprocket diameter and centre distance compact. Triple standard chains are manufactured to either ANSI B29.1 (American Standard) or BS/ISO 606 (British Standard) dimensions and are available in both standard and heavy-series link plate configurations.

We are Kolkata-based specialists in the Diamond Sprockets industry, and we have been supplying Diamond-grade Triple Standard Chains across West Bengal and throughout India for over twelve years. When a plant engineer is facing a drive that has outgrown its single or double strand chain — motor loads have increased, output has been scaled up, or the original design was under-specified — a triple standard chain is often the most space-efficient and cost-effective solution.

Simplex, Duplex, Triplex — Which to Choose?

The single most important decision in multi-strand chain specification is understanding when a triple standard chain is the right answer — and when a simplex or duplex chain is sufficient. The triplex (triple standard) chain is specified when: (a) the required load exceeds what a duplex chain can deliver, (b) increasing the chain pitch to a heavier series is not possible due to sprocket size or centre distance constraints, or (c) the drive design calls for high power transmission at a relatively low chain speed. A triple standard chain is wider than a simplex or duplex but uses the same pitch — so the sprocket pitch circle diameter stays the same, keeping the drive layout unchanged. This makes it the ideal upgrade path when a machine's load requirements increase after installation.

If you are unsure whether your application needs a simplex roller chain, a double standard roller chain, or a full triple standard chain, our Kolkata technical team will review your motor power, drive speed, and sprocket dimensions and give you a definitive recommendation — free of charge.

Triple Chain Types & Full Specifications

Allied Industrial Corporation supplies a comprehensive range of Triple Standard Chains covering both international standards and the full pitch spectrum used in Indian industrial applications. Every triplex chain we supply can be matched to the correct Diamond Triplex Roller Chain sprocket and roller chain sprocket from our Kolkata stock.

Chain Type	Standard	Designation	Best Application
Triple Strand Roller Chain (ANSI)	ANSI B29.1	#40-3, #50-3, #60-3, #80-3, #100-3, #120-3	High-power American-standard drives
British Standard Triple Strand Chain	BS/ISO 606	06B-3, 08B-3, 10B-3, 12B-3, 16B-3, 20B-3, 24B-3	European-origin machinery, Indian OEM
American Heavy Series Triple Strand Chain	ANSI B29.1 H-Series	#40H-3, #60H-3, #80H-3, #100H-3	Shock-load, heavy-duty industrial drives
Diamond Triplex Roller Chain	ANSI / IS 2403	Full range — Diamond grade	Premium India-market specification chain
Industrial Triple Strand Roller Chain	IS 2403 / ISO 606	Custom pitch range	General heavy-industry Indian plants
Heavy Duty Triple Strand Chain	DIN 8187 / Custom	Large pitch heavy series	Mining, cement, steel plant drives
Stainless Steel Triple Strand Chain	ISO 606 · AISI 304/316	08B-3 to 16B-3 SS	Food, pharma, chemical conveying

Complete Product Specifications

All Triple Standard Chains supplied by Allied Industrial Corporation are manufactured to IS 2403, ANSI B29.1, and ISO 606 standards with full material traceability. The following parameters cover our standard Diamond triplex chain range:

Allied Industrial Corporation has direct supply experience in all the above sectors. Our Kolkata warehouse stocks chains for rolling mills, jute mills, steel plants, paper mills, sugar mills, cement plants, fertilizer plants, food industries and construction machinery — ready for same-day or next-day dispatch across West Bengal.

Why Allied Industrial Corporation?

We are a Kolkata-based technical supplier — not a middleman or a catalogue listing. Our warehouse is stocked, our team is trained, and our relationships with Diamond-grade chain manufacturers give us access to the full triplex chain range at competitive pricing. Here is what working with Allied Industrial Corporation for triple standard chain actually delivers:

A triple standard chain is a high-value, high-specification product — and getting it wrong (wrong pitch, wrong standard, wrong strand count, wrong sprocket bore) means a drive that fails prematurely and a replacement cost far exceeding what you saved by not asking the right questions first. We ask the right questions as a matter of routine. Every triple chain order at Allied Industrial Corporation is reviewed by our technical team before dispatch — ensuring the chain, the connecting links, and the sprocket are all correctly matched before they leave our Kolkata facility.

We also stock the complete chain family that surrounds the triple standard chain — including Diamond Simplex Roller Chain, Double Standard Roller Chain, American Heavy Series Double Strand Chain, Industrial Conveyor Chain and Diamond Engineering Class Chains — so your entire plant's chain requirement can be fulfilled from one trusted Kolkata supplier.

FAQs — Triple Standard Chain

How to Select the Right Strand Count

Choose the strand count based on power and space, in this order: First, calculate the required chain load from your motor kW and chain speed. If a simplex chain of your required pitch can carry that load with a 5:1 safety factor, use simplex. If the load exceeds simplex capacity, move to duplex (approximately 1.8× simplex). If duplex is insufficient and you cannot increase the pitch (due to sprocket size or centre distance limits), specify triplex (approximately 2.7× simplex). Our Kolkata technical team performs this calculation daily for buyers across India — contact us with your drive data and we will recommend the correct strand count within the hour.

Is a Triple Standard Chain the same as a Triplex Roller Chain?

Yes — Triple Standard Chain, Triple Strand Roller Chain, Triplex Chain, and Diamond Triplex Roller Chain are all names for the same product: a three-strand parallel roller chain sharing common connecting pins. The name varies by manufacturer, catalogue, and regional terminology. In India, "triple strand chain" and "triplex chain" are most common in B2B procurement. "Triple standard chain" is the designation used in Diamond chain catalogues and is the standard product name at Allied Industrial Corporation.

Can I replace a triple strand chain with three separate simplex chains?

No — and this is a critical safety point. A genuine triple standard chain uses common connecting pins that run through all three strands simultaneously, ensuring equal load distribution across all strands at every articulation point. Running three separate simplex chains side by side on a triplex sprocket without common pins creates severe load imbalance, premature wear, and a high risk of chain failure under load. Always use a correctly manufactured triplex chain on a triplex sprocket. Allied Industrial Corporation supplies matched triplex chains and sprockets precisely to prevent this kind of field improvisation from causing plant incidents.

What is the difference between ANSI and BS Triple Standard Chain?

The dimensional difference between ANSI (#-3 suffix) and British Standard (B-3 suffix) triplex chains at the same pitch lies primarily in the roller diameter and inner link dimensions — even though the pitch may be identical. For example, ANSI #40-3 and BS 08B-3 both have a 12.7 mm pitch, but their roller diameters, pin diameters, and plate thicknesses differ. They are NOT interchangeable. If your machine was designed on ANSI, use ANSI triplex chain and ANSI triplex sprockets. If it was designed on British Standard, use BS triplex chain and BS sprockets. Our Kolkata team will identify your standard from old chain markings or a photograph — contact us before ordering if you are unsure.

What is the minimum order for B2C buyers in Kolkata?

Individual buyers and small workshops can purchase from as little as 1 metre of triple standard chain. We cut to your required length and supply with the correct triplex connecting links and split pins. There is no minimum order commitment for B2C purchases. For B2B bulk orders, we offer volume pricing — contact our Kolkata office for a customised quotation, and ask about our annual rate contract terms if you have a recurring requirement.