Fluidampr 100012 Harmonic Balancer Adapter Hub BBC Internal Balance Dual Key

The Fluidampr 100012 is a precision-engineered replacement adapter hub designed specifically for big block Chevy engines with internal balance configurations. This critical component serves as the interface between your crankshaft and Fluidampr harmonic balancer, ensuring proper vibration damping and engine protection.

Key Features:

• Designed for Chevy 396-427 cubic inch big block engines with internal balance
• Dual keyway design with 3/16" and 1/4" key slots for secure crankshaft engagement
• Precision machined to maintain recommended press fit tolerance of 0.0005" to 0.0015"
• Direct replacement for worn or damaged adapter hubs on Fluidampr models #800131 and #80257E
• Engineered to restore optimal vibration control performance

Repeated installation and removal of harmonic balancers can gradually wear the adapter hub, compromising the critical press fit that ensures effective vibration damping. This replacement hub allows you to maintain your Fluidampr's performance without replacing the entire damper assembly. The dual keyway configuration provides enhanced rotational stability and load distribution across the crankshaft interface.