Extension Clamp Compatible with ER11A, 8mm Bore, 16mm Outer Diameter, 40mm Length, for CNC Router Spindle, 8mm Shaft

Wide Compatibility: Compatible with ER11A and ER11 spindles and with 8 mm motor shafts on desktop CNC routers, spindles, and drill presses.
Quick Extension: Converts an 8 mm shaft into a collet end; 40 mm body increases reach and speeds up tool changes in compact setups and enclosures.
Precise Fit: 16 mm outside diameter fits standard collets; 8 mm bore with 0.02 mm tolerance to maintain concentricity, reduce vibration, and improve surface finish.
Durable Construction: Steel body with ground bearing surfaces; Collet nut (19 mm outer diameter, 9 mm inner diameter) ensuring stable clamping for milling, drilling, and engraving. Versatile Use: Suitable for PCB routing, acrylic cutting, wood carving, and light metal finishing in workshops, fab labs, classrooms, and small production runs.