The GPM 40Cr Steel Motor Gear 27T is a precision engineered pinion designed for higher durability in power transmission systems. Material is 40Cr steel with a black hardening treatment; geometry is 32 pitch with a 0.8mm module and a tooth diameter of 3.175mm, ensuring accurate engagement and reduced wear under load. This component is suited to hobbyists seeking a robust replacement gear for drivetrain upgrades.