Sandvik Coromant 5721813 ER40 Collet Chuck BT40 Taper Shank

Product Description

The SANDVIK COROMANT 5721813 is an ER40 collet chuck with a BT40 taper shank, designed for use in CNC machining centers and milling applications. It accepts ER40 series collets and delivers a 2.7559-inch projection from the gauge line, with an overall length of 5.4488 inches and a nose diameter of 2.4803 inches. The chuck is balanced for operation up to 18,000 RPM and features through-coolant capability compatible with both through-spindle and DIN flange coolant delivery systems. It is installed by machinists and toolroom technicians in production and precision machining environments.

This collet chuck is suited for high-speed milling, drilling, and reaming operations in vertical and horizontal machining centers equipped with BT40 spindle interfaces. The through-coolant design supports effective chip evacuation and tool cooling at elevated spindle speeds, making it appropriate for ferrous and non-ferrous material removal applications. The ER40 collet series accommodates a wide range of tool shank diameters, providing flexibility across multiple tooling setups on a single chuck body.

Key Features

• ER40 collet system accepts a broad range of tool shank diameters
• BT40 taper shank for direct spindle interface on compatible machining centers
• Balanced to 18,000 RPM for high-speed machining applications
• Through-coolant capable via through-spindle and DIN flange delivery
• 2.7559-inch projection provides clearance for a variety of workpiece geometries
• Nose diameter of 2.4803 inches suits standard ER40 tooling configurations

Compatibility

Designed for use with BT40 taper spindle machining centers and ER40 series collets. Through-coolant compatibility requires a through-spindle or DIN flange coolant system on the host machine.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician familiar with CNC tooling assemblies. Power down and lock out the machining center before mounting or removing the chuck from the spindle. Use the appropriate BT40 pull stud and spindle drawbar torque procedure specified by the machine manufacturer. Verify collet seating and clamping torque with a calibrated torque wrench before resuming spindle operation.