Full definition
Power transmission element formed by alternating inner and outer link plates connected by pins, with free-spinning rollers that engage toothed sprocket wheels. Transmits power through positive engagement at up to 98% efficiency. Standardized per ANSI B29.1 (inch: #25 to #240) and ISO 606 (metric: 04B to 72B). Pitch is the key dimension (distance between pin centers): common sizes 3/8" (#35), 1/2" (#40), 5/8" (#50), 3/4" (#60), 1" (#80). Simplex, duplex, or triplex strand configurations for increasing load. Requires periodic lubrication per chain speed. Brands: Rexnord, Tsubaki, Renold, Donghua. Life: 15,000+ hours with proper maintenance.