Sandvik Coromant 5721237 ER16 Collet Chuck CAT40 Taper

Product Description

The SANDVIK COROMANT 5721237 is an ER16 collet chuck with a CAT40 taper shank, designed for precision tool holding in CNC machining centers. It accepts ER16 series collets and features through-coolant capability for cutting operations that require directed coolant flow to the tool tip. With a projection of 2.62 inches and an overall length of 5.31 inches, this chuck suits applications where reach and rigidity must be balanced. It is balanced to 18,000 RPM, making it appropriate for high-speed spindle applications. A wrench-actuated locking mechanism provides secure collet retention. Machinists and CNC setup technicians install this chuck in CAT40 spindle tooling assemblies.

This collet chuck is suited for use in vertical and horizontal machining centers equipped with CAT40 spindle tapers. It is a fit for operations involving drilling, reaming, tapping, and light milling where ER16 collets are the specified workholding method. The through-coolant feature makes it effective in applications using high-pressure coolant systems to extend tool life and improve chip evacuation in deep-hole or blind-bore work. It is commonly found in production and job-shop environments running moderate spindle speeds.

Key Features

• ER16 collet system with CAT40 taper shank for direct spindle mounting
• Balanced to 18,000 RPM for high-speed machining compatibility
• Through-coolant capability for directed coolant delivery to the cutting zone
• 2.62-inch projection provides reach for recessed or deep-feature work
• Wrench-actuated collet locking for secure and repeatable tool holding
• Overall length of 5.31 inches with a nose diameter of 1.09 inches

Compatibility

Designed for use with ER16 series collets in CAT40 spindle tooling systems on CNC machining centers equipped with through-coolant spindle capability.

Installation Notes

Installation and removal should be performed by a qualified CNC machinist or tooling technician with the machine spindle locked and all power and coolant flow shut off. Use the appropriate ER16 collet spanner wrench and CAT40 retention knob torqued per the machine builder specification. Inspect the taper shank and spindle bore for contamination or damage before seating the chuck. Verify coolant port alignment when through-coolant function is required.