The Brewer Machine & Gear 1BU4F Idler Pulley is a single-groove V-belt idler with a 4 in outside diameter, a 1 in bore, and a 1.50 in through-bore length, designed for B-section belts. It features a needle bearing set in a cast-iron body for smooth rotation and durability under load. The 7/8 in wide bearing face provides a compact contact profile for reliable belt guidance in Brewer tensioner systems and universal drive tensioners. This pulley maintains belt alignment and tension in industrial belt-drive applications such as conveyors and machine tools that use a 1-groove V-belt, and it is compatible with Brewer's standard B-belt drive configurations.
