Power Hydraulic Chuck, JIS B 6339, BT40

The most important features:
1. High runout accuracy (< 0.003 mm) 2. Low tendency towards vibrations by optimised outer geometry 3. Slim design at the top 4. Very rigid shank 5. Standard with Cool Jet (can be re-sealed) 6. Dirt groove in the clamping bore for safe clamping force 7. Safe-Lock (optional)