Iscar 4508004 ER32 Collet Chuck 25mm Straight Shank

Product Description

The ISCAR 4508004 is an ER32 collet chuck designed for precision tool holding in CNC machining centers, milling machines, and similar spindle-driven equipment. It accepts ER32 series collets with a clamping range of 2 mm to 20 mm, covering a wide variety of end mills, drills, and other cutting tools. The chuck features a straight shank with a 25 mm shank diameter and delivers a total indicator runout (TIR) of 0.0002 inches (0.005 mm), making it suitable for applications where concentricity is critical. Through-coolant capability allows coolant delivery directly to the cutting zone, extending tool life and improving chip evacuation. This chuck is installed by machinists and toolroom technicians using a standard ER32 wrench actuator.

The ISCAR 4508004 is well suited for production and job-shop environments running general-purpose machining operations on ferrous and non-ferrous materials. The straight shank design is compatible with machine spindles and toolholding blocks configured for straight-shank chucks at 25 mm diameter. The through-coolant feature makes it a practical choice for deep-hole drilling, high-speed milling, and operations where external coolant delivery is insufficient. Typical users include CNC machinists, setup technicians, and toolroom personnel in both job shops and production facilities.

Key Features

• ER32 collet system with a clamping range of 2 mm to 20 mm (0.0787 to 0.7874 inches)
• Low TIR of 0.0002 inches (0.005 mm) for high-concentricity tool holding
• Through-coolant via through-spindle coolant delivery for direct cutting zone coverage
• Straight shank at 25 mm diameter and 50 mm shank length for broad machine compatibility
• Overall length of 4.0157 inches (102 mm) with a 2.0472-inch (52 mm) projection
• Wrench-actuated clamping using standard ER32 locknut wrenches

Compatibility

Designed as an OEM-style ER32 collet chuck replacement for machine spindles and toolholding systems configured to accept a straight shank at 25 mm diameter. Compatible with the full range of standard ER32 series collets.

Installation Notes

Installation and removal should be performed by a qualified machinist or toolroom technician. Always power down and lock out the machine spindle before changing or seating a collet chuck. Use the correct ER32 torque wrench or spanner wrench to tighten the locknut to the collet manufacturer's recommended procedure — do not use improvised tools that could damage the locknut or collet taper. Verify runout with a dial indicator after installation before returning the machine to production cuts.