Roller Chain & Sprockets: BS, ASA Drive Chain, Connecting Links and Taper Lock Sprockets

Roller chain and sprocket drives are among the most reliable power transmission solutions in industrial use — delivering high efficiency, positive drive, and long service life when correctly selected and maintained. AIMS Industrial supplies hundreds of chain and sprocket products from KCM, SY & Tsubaki, including British Standard (BS) and American Standard (ASA) simplex, duplex & triplex roller chain, pilot bore sprockets, taper lock sprockets, weld-fit sprockets, connecting links, and tensioner idlers.

The AIMS Chain & Sprockets Range

Our range covers both BS (most common in industrial Australian plant) and ASA (common in imported US equipment & agricultural equipment) drive systems.

• KCM BS Roller Chain (Simplex/Duplex/Triplex): British Standard (BS) simplex roller chain is the dominant chain standard in Australian industrial plant. KCM BS roller chain is available in standard simplex or multiple strand with connecting links, offset/half (crank) links, and full box quantities for maintenance and replacement applications.
• KCM ASA Roller Chain (Simplex/Duplex/Triplex): American Standard (ASA/ANSI) roller chain for imported US-specification equipment and machinery. Available in connecting link and full-box configurations.
• Pilot Bore Sprockets (BS & ASA): BS and ASA pilot bore sprockets in simplex, duplex & triplex strand configurations allow custom bore and keyway machining to suit your specific shaft dimensions. Hardened tooth for abrasive and high-cycle applications.
• Taper Lock Sprockets: BS taper lock sprockets accept standard taper lock bushes for rapid shaft mounting and demounting without shaft machining — the preferred configuration for maintenance-friendly drive system design.
• Weld-Fit Sprockets: BS and ANSI weld-fit sprockets with hardened teeth for permanent shaft welding in drives where taper lock or pilot bore is impractical. Common in conveyor and agricultural applications.
• Tensioner Idler Sprockets: Tensioner idler sprockets maintain correct chain tension across the span, extending chain and sprocket life and preventing jump-off under variable loads.

Chain Drive Maintenance & Selection

• Chain Matching: Chain sizes are identified by pitch: 06B/ASA35 (3/8"), 08B/ASA40 (1/2"), 10B/ASA50 (5/8"), 12B/ASA60 (3/4"), 16B/ASA80 (1"), 20B/ASA100 (1-1/4"). Always replace chain and sprockets together when either shows wear — mixing new chain with worn sprockets accelerates re-wear of the new chain.Note that even though BS & ASA chain have the same pitch, other dimensions differ slightly, so it is important to find chain/sprocket identifying markings or measure multiple dimensions carefully.
• Lubrication is Critical: Unlubricated roller chain can lose 30-50% of its theoretical service life. See our lubrication range for chain oils and lubricants appropriate for your operating temperature and environment.
• Expert Support: Need help selecting the right chain pitch, strand count, or sprocket bore for your drive? Contact our team or request a quote for drive system specification support.
• Australian Business, Local Supply: As a proudly Australian business since 1988, we stock locally and work with trusted local Australian manufacturers and distributors to ensure fast, reliable supply.

Also see our sprockets, industrial V belts, V pulleys, and bearings and bushings for complementary power transmission components.