Size 40 Chain 50' Roll for FarmOne New Aftermarket Replacement Size 40 Roller Chain 50' Roll for Agricultural and Industrial Use This ANSI #40 single strand roller chain is sold in a convenient 50 foot roll and is a direct replacement for standard #40 chain used in a wide range of agricultural equipment including planters, balers, combines, feeders, and other farm machinery drives. The #40 chain is one of the most widely used roller chain sizes in the industry, offering an