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Chain

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These chains consist of interconnected links, which include rollers that engage with sprockets to transfer mechanical power efficiently. They are commonly used in industrial machinery, conveyors, and agricultural equipment due to their durability and ability to handle high loads and speeds.

ANSI Attachment Chain and Links

ANSI Attachment Chain and Links are specialized roller chains designed with built-in attachments, allowing for easy mounting of components such as slats, crossrods, or other mechanical parts.

ANSI Roller Chain Link Assortments

ANSI Roller Chain Link Assortments consist of various types and sizes of links designed to match ANSI standard roller chains. These assortments typically include connecting links, offset links, and roller links, providing flexibility for repairs, extensions, or custom configurations in power transmission and conveyor systems.

Metric Roller Chain and Links

Metric Roller Chain and Links are power transmission chains designed to meet metric size standards, commonly used in machinery and equipment in regions that follow the metric system. These chains provide reliable and efficient mechanical power transmission in applications such as conveyors, industrial machinery, and agricultural equipment.

Miniature Roller Chain and Links

These smaller chains provide reliable power transmission in devices like robotics, small conveyors, and precision instruments. Despite their size, they maintain the durability and functionality of standard roller chains, making them ideal for light-duty tasks that require accuracy and efficiency.

Bushings for Chain and Belt Drives

Bushings for Chain and Belt Drives are components used to secure sprockets or pulleys to shafts in power transmission systems. They provide a tight, secure fit while allowing for easy installation and removal, often through tapered or split designs.

What Is Roller Chain?

Roller chain transmits mechanical power between two rotating shafts by engaging a series of pin-connected links with the teeth of a sprocket. It delivers precise, positive-drive motion at a lower cost than gear drives, while tolerating higher loads and harsher conditions than most belt systems. LILY Bearing stocks roller chain, attachment chain, link assortments, and mounting bushings built to ANSI B29.1 and ISO 606 (DIN 8187 / British Standard) specifications, in inch and metric pitches, single through triple strand, and carbon steel, stainless steel, and other corrosion-resistant materials.

Shop Chain by Type

Category	Standard	Trade Sizes / Pitch	Strand Options	Materials	Best For
ANSI Roller Chain and Links	ANSI B29.1	#25–#160	Single, double	Steel, stainless steel, plastic	General power transmission, conveyors, agricultural equipment
ANSI Attachment Chain and Links	ANSI B29.1	Built on #35–#80 base chain	Single	Steel	Conveying with fixed attachment points (buckets, slats, pushers)
ANSI Roller Chain Link Assortments	ANSI B29.1	Boxed multi-piece kits	Single	Steel	Field repair, chain shortening or lengthening
Metric Roller Chain and Links	ISO 606 / DIN 8187	04B–28B	Single, double	Steel, stainless steel	Metric and imported machinery, OEM equipment
Miniature Roller Chain and Links	Miniature pitch series	0.1227″–0.1475″ pitch	Single	Plastic, stainless steel	Robotics, small conveyors, precision instruments
Bushings for Chain and Belt Drives	—	Inch and metric bore	—	Steel, stainless steel, iron	Mounting sprockets, pulleys, or hubs to a shaft

ANSI and metric (ISO) chain are not interchangeable on the same sprocket, even at a similar pitch, because roller diameter, pin diameter, and link plate dimensions differ between the two standards. Single-strand chain is the standard configuration for most drives; double- and triple-strand chain adds parallel rows of links on a common pin to increase load capacity within the same pitch, used when a drive needs more capacity than a larger single-strand pitch would allow.

Where Is Roller Chain Used?

Conveying and material handling — package conveyors, bulk material transfer, palletizing lines
Agricultural equipment — combines, balers, and other harvesting and processing machinery
Food and beverage processing — bottling, canning, and packaging lines (stainless and corrosion-resistant options)
General industrial machinery — drives, gearboxes, and low- to medium-speed power transmission
Light-duty and precision equipment — small conveyors, instruments, and compact mechanisms (miniature chain)

Frequently Asked Questions

What is the difference between ANSI and metric (ISO) roller chain?

ANSI roller chain (ANSI B29.1) uses inch-based pitches and numeric trade sizes such as No. 40 or No. 60, while metric roller chain (ISO 606, equivalent to DIN 8187 and British Standard) uses metric pitches and B-series trade sizes such as 08B or 10B. The two are not interchangeable on the same sprocket, even when the pitch length is similar, because roller diameter, pin diameter, and link plate dimensions differ between the standards.

What is the difference between roller chain and attachment chain?

Standard roller chain has plain, uninterrupted link plates, while attachment chain replaces certain link plates with attachment plates that add tabs or extended pins so the chain can carry buckets, slats, pushers, or other conveyed components. Attachment chain uses the same pitch and roller dimensions as the equivalent standard roller chain size, so it runs on the same sprockets.

What is a roller chain link assortment used for?

A link assortment is a boxed kit of connecting links, offset links, and standard roller links in a single trade size, used for field repairs, shortening or lengthening an existing chain, or assembling a custom chain length without ordering a full reel.

What do "bushings for chain and belt drives" do, and are they part of the chain itself?

These bushings mount a sprocket, pulley, or hub onto a shaft — they are a separate shaft-mounting component, not the internal bushing inside each roller chain link that the roller rotates around. Common styles include quick-disconnect (QD), taper-lock, split-taper, screw-clamp, and weld-on.

Should I choose single-strand or double-strand roller chain?

Single-strand chain is the standard choice for most power transmission and conveying loads, while double-strand (or triple-strand) chain adds parallel rows of links on a common pin to increase load capacity within the same pitch and sprocket width. Choose multi-strand chain when the application load or horsepower requirement exceeds what the equivalent single-strand pitch can carry.

How is roller chain size identified?

ANSI roller chain size is identified by a trade number where the digits represent the pitch in eighths of an inch — for example, No. 40 chain has a 4/8″ (0.5″) pitch and No. 60 chain has a 6/8″ (0.75″) pitch. A “-2” or “-3” suffix indicates double- or triple-strand construction, while metric/ISO chain is designated by a number plus “B” (e.g., 08B, 10B) referencing the ISO 606 pitch series.