The Leitz HSK63F Shrink Fit Chuck L37710 is developed for CNC machining centers requiring a rigid, concentric connection between the spindle and cutting tool. Inductive heating expands the 20 mm clamping bore for tool insertion; controlled cooling then creates uniform radial clamping around a compatible h6 cylindrical shank.

The toolholder combines a 75 mm gauge length with a 100 mm body length to provide useful reach while maintaining a slim external profile for machining clearance. Its monoblock premium hot-work-steel construction helps control vibration and supports stable retention during high-speed routing, profiling, nesting, and edge-machining operations.

The supplied specifications identify runout accuracy of less than or equal to 0.003 mm and fine balancing to G2.5 at 24,000 RPM parameters. When installed and maintained correctly, this configuration supports precise use of compatible 20 mm solid-carbide or PCD tooling shanks while helping protect cutting edges, spindle bearings, and finished-part quality.