18 Tooth Gilmer Drive Crank Pulley

The 18 Tooth Gilmer Drive Crank Pulley from MOROSO is a precision-engineered crankshaft pulley designed for engine builders and performance enthusiasts who demand reliable synchronous belt drive systems. This universal pulley serves as the critical interface between your engine's crankshaft and accessory drive components, eliminating slippage common in traditional serpentine systems. Whether you're building a custom engine, upgrading from worn OEM equipment, or standardizing multiple engine configurations, the Gilmer drive profile ensures consistent power transmission and repeatable tuning results across diverse applications.

Constructed from lightweight aluminum with black anodized finish, this pulley features 18 precisely machined teeth on a 3/8 inch pitch Gilmer profile, offering superior engagement compared to V-belt alternatives. The 1 inch mandrel bore accepts standard crankshaft flanges, while the 1/8 inch keyway provides positive mechanical lock preventing rotational slip under high RPM and boost conditions. The 1 inch width profile balances belt capacity with minimal inertia, making it ideal for naturally aspirated builds and forced induction applications where accessory load consistency matters. Black anodized finish resists corrosion and maintains professional appearance through years of engine bay exposure.

This Gilmer drive crank pulley suits street rods, race engines, marine powerplants, and any custom build requiring synchronous belt architecture. Installation requires matching Gilmer-profile serpentine belts and compatible water pump, alternator, and accessory pulleys—verify your entire drive train components before ordering. Mechanics and engine builders appreciate the universal design's flexibility across manufacturers and engine families, reducing inventory complexity while maintaining OEM-level reliability. Weighing just 0.3 lbs, it minimizes parasitic drag and rotational inertia, supporting both economy builds and high-output performance platforms.