SPARE NUT ER-11

It is a replacement clamping nut used in an ER11 collet chuck system to securely hold cutting tools or drill bits in CNC machines and spindles. Uses: Securely clamps ER11 collets in the tool holder. Holds end mills, drill bits, and engraving tools firmly. Helps maintain accurate tool alignment and concentricity. Reduces tool slippage during machining operations. Used in CNC routers, milling machines, engraving machines, and spindle motors.