Iscar 4502025 ER20 Collet Chuck 1 in Straight Shank

Product Description

The ISCAR 4502025 is an ER20 collet chuck designed for use in CNC machining centers, milling machines, and similar rotating spindle equipment. It accepts ER20-series collets with a clamping capacity range of 0.041 to 0.514 inches, making it suitable for a wide variety of small to mid-range cutting tool shank diameters. The chuck features a 1-inch straight shank for direct mounting into compatible spindle holders or tool blocks. A through-coolant design channels coolant directly to the cutting zone, supporting chip evacuation and tool life in demanding cutting operations. Actuation is wrench-driven via a standard ER collet nut.

This collet chuck is intended for precision machining environments where consistent tool runout and rigid clamping are required. It is well-suited for production shops, toolrooms, and job shops running light to medium milling, drilling, reaming, or tapping operations. The straight shank configuration is common in manual and CNC mill setups that utilize straight-shank tool holders or collet-chuck adapters. Machinists and tooling setup technicians are the primary installers and users of this type of toolholder.

Key Features

• ER20 collet system with 0.041 to 0.514 inch capacity range
• 1-inch straight shank diameter for broad machine compatibility
• Through-coolant capable with through-spindle coolant delivery
• 1.102 inch projection from gauge line to nose
• 5.039 inch overall length
• Nose diameter of 1.102 inches
• Wrench-actuated collet nut for reliable clamping torque

Compatibility

Designed for use with ER20-series collets. Compatible with machine spindles or tool blocks that accept a 1-inch straight shank. Verify spindle bore diameter and collet nut thread before installation.

Installation Notes

Installation and tool changes should be performed by a qualified machinist or tooling technician with the machine in a full stop and energy-isolated state per applicable lockout/tagout procedures. Use the correct ER20 collet wrench and spanner to achieve proper clamping torque on the collet nut. Do not exceed the collet capacity range when seating cutting tools. Inspect the shank and bore seating surfaces for burrs or contamination before mounting.