Brewer Machine & Gear Co. P1B Flat Belt Idler Pulley is a replacement pulley for guiding flat belts in belt-driven equipment, helping keep the belt path true and minimize wear. The P1B model specifies a 4-1 2" OD, identifying the outer diameter used for compatible belt routing and mounting in suitable machines. Use this idler in flat belt drive configurations where Brewer’s P1B is the correct mounting and diameter to maintain proper belt alignment.
