Accupro 775652 ER25 Collet Chuck CAT40 Taper Shank

Product Description

The ACCUPRO 775652 is an ER25 collet chuck with a CAT40 taper shank, designed for precision toolholding on CNC machining centers. It accepts ER25 collets in the ER collet system, covering a clamping capacity range of 0.039 to 0.629 inches. The chuck delivers a maximum total indicator runout (TIR) of 0.0002 inches, supporting tight-tolerance milling and drilling operations. A 4-inch projection from the spindle face provides clearance for a wide range of workpiece geometries. Through-spindle and DIN flange coolant compatibility allows directed coolant delivery to the cutting zone. Machinists and CNC setup technicians install this chuck as part of standard CAT40 tooling configurations.

This collet chuck is suited for use on CNC vertical and horizontal machining centers equipped with CAT40 spindles. The ER25 collet series accommodates a broad range of cutting tool shank diameters, making it a practical choice for shops running mixed tooling setups in production or job-shop environments. The 4-inch projection is appropriate for applications requiring reach past fixtures or into recessed features. The 30,000 RPM balance rating supports high-speed machining applications where spindle dynamics are a concern. The collet nut diameter measures 1.65 inches.

Key Features

• ER25 collet system with 0.039 to 0.629 inches capacity range
• CAT40 taper shank for compatibility with standard CNC machining center spindles
• TIR of 0.0002 inches for precision toolholding
• 4-inch projection for clearance in complex workholding setups
• Through-spindle and DIN flange coolant delivery
• Balanced to 30,000 RPM for high-speed machining

Compatibility

Designed for use with CAT40 spindle machining centers and ER25 series collets. Accepts standard ER25 collets for cutting tool shanks from 0.039 to 0.629 inches in diameter.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Power down and lock out the machine spindle before mounting or removing the chuck from the spindle. Inspect the CAT40 taper and spindle socket for contamination or damage before seating; cleanliness at the taper interface directly affects runout. Torque the drawbar and collet nut according to the machine tool manufacturer specifications using appropriate spanner wrenches.