Diamond Industrial Single Standard Chain in Kolkata — Diamond Simplex Chains by Allied Industrial Corporation

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

If you've ever maintained a pump in a chemical plant, serviced a loom in a jute mill, or replaced a drive chain in a sugar factory — you've worked with a Single Standard Chain. It's the most fundamental, most widely stocked, and most frequently ordered industrial chain in India. Simple in concept. Precise in execution. Absolutely critical in practice.

At Allied Industrial Corporation — Kolkata's authorised Diamond (TIDC India) chain dealer since 1969 — we stock the complete Diamond Single Standard Chain range: every BS series size from 06B-1 to 40B-1, and the full ANSI series from #25 to #120. For immediate dispatch across Kolkata, West Bengal, and Eastern India.

What Is a Single Standard Chain & How Does It Work?

A Single Standard Chain — the technical name for a Simplex Roller Chain — is a single-strand roller chain in which one row of rollers engages a single set of sprocket teeth to transmit rotational power between two shafts. It is the most elemental building block of mechanical power transmission, used in everything from a corner-workshop motorcycle repair to a 24-hour steel plant drive.

Why Diamond Single Standard Chains Last Longer

Diamond chains are manufactured by TIDC India — part of the Murugappa Group, established 1960 — and are India's market-leading industrial chain brand. What separates Diamond from the flood of generic chains in the Indian market:

• Proprietary pin surface treatment: TIDC India's patented process delivers 3 to 3.5× the wear life of a standard chain pin — critical in Indian factory environments with intermittent lubrication and high ambient dust.

• Alloy steel throughout: Cold-drawn alloy steel wire, case-hardened link plates, and heat-treated pins — not mild steel with a surface coating.

• International standard compliance: Every Diamond Single Standard Chain meets ISO 606, BS 228, DIN 8187 (BS series) and ASME B29.1 (ANSI series) — verified, not merely claimed.

• BIS IS:2403 certified: Relevant Indian Standard for roller chains — verifiable through the Bureau of Indian Standards portal (bis.gov.in).

Diamond Single Standard Chain Types We Supply

The term 'Single Standard Chain' covers two main standards in the Indian market, and several material variants. Allied Industrial Corporation stocks all of the following from Diamond (TIDC India):

BS Standard (British Standard) — ISO 606 / BS 228 / DIN 8187: The standard used on virtually all Indian-designed machinery, European equipment, and most Asian OEM machines. Identified by the 'B' designation: 06B-1, 08B-1, 10B-1, 12B-1, 16B-1, 20B-1 and up to 40B-1. If your machine was manufactured in India, or by a European or Asian OEM, you almost certainly need the BS series. This is the most widely stocked series at Allied Industrial Corporation's Kolkata warehouse.

ANSI Standard (American National Standard) — ASME B29.1: Used on machinery designed in the USA, some Japanese OEM equipment, and any machine with inch-based pitch (e.g. 1/2", 5/8", 3/4"). Identified by number codes: #25, #35, #40, #50, #60, #80, #100, #120. If your plant has imported US equipment, or your machine specifies 'ANSI chain' or an imperial pitch size, you need the ANSI series. Allied Industrial Corporation stocks Diamond ANSI series for immediate supply.

Diamond Single Standard Chain Specifications — India 2026 Reference

For plant engineers and procurement managers: below is the complete Diamond BS Standard Simplex Roller Chain specification table, sourced from TIDC India's IC Catalogue and ISO 606 / BS 228 standards. These are the 10 most widely used chain sizes in India:

#	Chain Model	Key Specs	Break Load	Application
1	06B-1	Pitch 9.525 mm | Roller Ø 6.35 mm | Transverse 3.28 mm | Plate 1.30 mm	9.0 kN	Light conveyors, packaging machinery, textile drives
2	08B-1	Pitch 12.70 mm | Roller Ø 8.51 mm | Transverse 4.45 mm | Plate 1.60 mm	18.0 kN	Most common — pumps, gearboxes, food conveyors, textile
3	10B-1	Pitch 15.875 mm | Roller Ø 10.16 mm | Transverse 5.08 mm | Plate 2.00 mm	22.2 kN	General industrial drives, printing machines, agriculture
4	12B-1	Pitch 19.05 mm | Roller Ø 12.07 mm | Transverse 5.72 mm | Plate 1.85 mm	29.0 kN	Cement plants, conveyor drives, compressors, pumps
5	16B-1	Pitch 25.40 mm | Roller Ø 15.88 mm | Transverse 8.28 mm | Plate 3.10 mm	60.0 kN	Heavy duty — rolling mills, steel plants, mining
6	20B-1	Pitch 31.75 mm | Roller Ø 19.05 mm | Transverse 10.19 mm | Plate 4.62 mm	95.0 kN	Sugar mills, steel plants, heavy industrial systems
7	24B-1	Pitch 38.10 mm | Roller Ø 25.40 mm | Transverse 14.63 mm | Plate 4.80 mm	160.0 kN	Port machinery, cement clinker, heavy conveyors
8	28B-1	Pitch 44.45 mm | Roller Ø 27.94 mm | Transverse 15.90 mm | Plate 5.04 mm	200.0 kN	Large industrial plants, crushing machinery
9	32B-1	Pitch 50.80 mm | Roller Ø 29.21 mm | Transverse 17.81 mm | Plate 5.72 mm	250.0 kN	Mining, port handling, bulk material systems
10	40B-1	Pitch 63.50 mm | Roller Ø 39.37 mm | Transverse 22.89 mm | Plate 7.20 mm	355.0 kN	Ultra-heavy conveyor systems, large industrial drives

Note: Breaking load = minimum per ISO 606. Transverse pitch applies for duplex/triplex reference only. Weight per metre varies by size — contact Allied Industrial for full dimensional data. All chains comply with BS 228, ISO 606, DIN 8187 standards. Source: TIDC India IC Catalogue + ISO 606:2015.

For ANSI Standard (American Series) machinery and equipment in India — the following Diamond ANSI simplex roller chains are available through Allied Industrial Corporation:

#	Chain Model	Key Specs	Break Load	Application
1	ANSI #25	Pitch 6.35 mm | Roller Ø 3.18 mm | Inner Width 1.30 mm | Plate 0.76 mm	3.3 kN	Light duty — instruments, office machinery
2	ANSI #35	Pitch 9.525 mm | Roller Ø 4.78 mm | Inner Width 2.16 mm | Plate 1.27 mm	8.0 kN	Light conveyor, agricultural, appliances
3	ANSI #40	Pitch 12.70 mm | Roller Ø 7.93 mm | Inner Width 3.96 mm | Plate 1.52 mm	14.1 kN	Standard US-spec industrial drives
4	ANSI #50	Pitch 15.875 mm | Roller Ø 10.16 mm | Inner Width 5.08 mm | Plate 2.03 mm	22.2 kN	Pumps, compressors, general machinery
5	ANSI #60	Pitch 19.05 mm | Roller Ø 11.91 mm | Inner Width 5.94 mm | Plate 2.42 mm	31.1 kN	Heavy machinery, construction equipment
6	ANSI #80	Pitch 25.40 mm | Roller Ø 15.88 mm | Inner Width 7.92 mm | Plate 3.25 mm	55.6 kN	Steel plants, heavy conveyors, mining
7	ANSI #100	Pitch 31.75 mm | Roller Ø 19.05 mm | Inner Width 9.53 mm | Plate 3.96 mm	88.5 kN	Very heavy industrial, port machinery
8	ANSI #120	Pitch 38.10 mm | Roller Ø 22.23 mm | Inner Width 11.09 mm | Plate 4.57 mm	125.0 kN	Heaviest US-spec drives available in India

Note: ANSI chains use inch pitch (e.g. ANSI #40 = 1/2" pitch = 12.70mm). Dimensionally different from BS chains — do not mix standards on the same drive. Source: ASME B29.1 standard, TIDC India American Series IC Catalogue.