Sandvik Coromant 6412712 Tapping Chuck M8-M20 ER25

Product Description

The SANDVIK COROMANT 6412712 is a modular connection shank tapping chuck designed for rigid and floating tap holding in CNC machining centers and tapping machines. Built around an ER25 collet system, it accommodates taps ranging from M8 to M20 and delivers through-coolant capability for improved chip evacuation and tool life in deep-hole and high-production tapping applications. The chuck projects 4.8858 inches from the spindle face and features a 1.6535-inch nose diameter. It weighs 3.47 pounds and is suited for shops running high-volume ferrous and non-ferrous tapping cycles where coolant delivery to the cutting zone is critical.

This tapping chuck is intended for use on machining centers equipped with a compatible modular connection interface. The M8 to M20 tap capacity range covers the majority of general-purpose threading work in job shop and production environments. Through-coolant flow is directed internally through the chuck and collet to the tap, making it well-suited for blind-hole tapping in steel, cast iron, aluminum, and similar materials where heat buildup and chip packing are common concerns. Installation and tool changes are performed by licensed machinists or CNC tooling technicians as part of a standard tooling setup procedure.

Key Features

• M8 to M20 tap capacity covers a broad range of general threading applications
• ER25 collet system provides consistent clamping force and tap concentricity
• Through-coolant design delivers coolant directly to the cutting zone
• 4.8858-inch projection suits standard spindle-to-workpiece clearance requirements
• 1.6535-inch nose diameter with 1.0158-inch hole diameter for ER25 collet seating
• Modular connection shank allows repeatable, tool-to-tool interchangeability on compatible spindles

Compatibility

Designed for use with ER25 collet series tap holders on machining centers equipped with a modular side connection interface. Specific machine and spindle compatibility should be verified against the modular connection standard prior to installation.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Disengage spindle power and confirm the machine is in a safe, locked-out state before mounting or removing the chuck. Ensure the modular connection interface is clean and free of chips or debris before torquing the retention mechanism to the spindle manufacturer's specification. Verify coolant port alignment with the machine spindle before engaging through-coolant flow.