Lyndex C4017-0020-4.00 ER20 COLLET CHUCK 4.00 PROJECTION

Features

• TIR: <.0001" at collet face
• Made from nickel chrome molybdenum alloy, hardened to 55 - 58 Rc.
• Ground surface for perpendicular contact between retention knob and holder.
• AT3 or better taper contact: .0028 °s; tolerance variation 80 to 126 millionths
• Drive keys milled to same depth for symmetrical body design.
• Body is equal in diameter to the size of the nut for greater rigidity and also prevents chips from packing in or wrapping about.

• Ground collet face.
• Smooth to prevent coolant flare and provide better balance.
• Provide 50% more gripping power than standard nuts.