Techniks 04897 ER20 Straight Shank Tool Holder

The Techniks 04897 ER20 Straight Shank Tool Holder delivers rigid, high-precision tool holding for milling, drilling, reaming, and tapping in CNC systems, featuring an ER20 collet interface and a through-spindle coolant design for extended straight-shank reach. Designed for installation in CNC machining centers, milling machines, production machining cells, mold and die equipment, and OEM metalworking machinery that require an ER20 collet system with an extended straight shank, it achieves exceptional concentricity with a maximum runout of 0.0001 in (0.0025 mm) at speeds up to 25,000 RPM. Key dimensions include a 1 in (25.4 mm) shank diameter and a 167.9 mm overall length (projection 140 mm), with a 1 in body diameter, 34 mm workpiece-side body diameter, a 28 mm nose diameter, and a 28 mm taper length, and it accepts 0.5–14 mm (0.019–0.55 in) collets. The unit is built from hardened 8620 alloy steel and features a 28 mm gauge length taper, a through-spindle coolant system, and a backup screw thread M10 × 1.5 for secure mounting. This tool holder supports precision machining, replacement, retrofit projects, and preventive maintenance; common applications span aerospace, automotive, mold and die, medical device manufacturing, general metalworking, and high-speed CNC environments where rigidity and repeatable tool positioning matter. Common replacements include Techniks 04894 ER20, 04898 ER25, and 04900 ER32.