Industrial 40B19U Single Idler Chain Sprocket

Brewer Machine & Gear 40B19U is a single-strand idler sprocket designed for ANSI 40 chain drives. It features a steel sprocket with an oil-impregnated bronze bearing (bronze bushing), a 1.000 in bore, and 19 teeth, optimized for a 1/2 in pitch chain and an outside diameter of 3.296 in. This B-style hub/geometry indicates its compatibility with standard 40-chain, single-strand applications and Brewer tensioner assemblies. Use it to guide and tension roller chains in conveyors, machinery, and general power transmission setups where a compact, durable idler is required. The combination of a bronze bushing and steel gear provides wear resistance and smooth rotation on the idler shaft, helping maintain proper chain alignment and reducing side-load on the drive components.