Collis Tool 68837 Adjustable Spindle Extension 2MT

Product Description

The COLLIS TOOL 68837 is an adjustable spindle extension assembly designed for machine tool applications requiring extended reach between the spindle and the cutting tool. Built around a 2MT Morse taper shank, this assembly provides a rigid, concentric connection that maintains tool alignment under load. The extension length is 2 inches, the shank length is 3.625 inches, and the extension diameter is 0.9375 inches. A 3/8-inch flange and a 1-1/16 - 12 shank thread size complete the interface, making this a precise, application-specific component for lathe and drilling operations.

This spindle extension assembly is used in machining environments where standard tool-to-spindle reach is insufficient - common in lathe work, drill press setups, and boring operations on manual or CNC machines. The adjustable design allows the operator to fine-tune axial positioning of the cutting tool. It is installed by machinists and tool room technicians working with 2MT-compatible spindles. The included key size of 3/16 x 7/8 inches ensures positive drive engagement, and the assembly is compatible with adjustable adapter nut number 66606.

Key Features

• 2MT Morse taper shank for secure, self-locking spindle engagement
• 2-inch extension length adds reach without sacrificing concentricity
• 1-1/16 - 12 shank thread size for precise tool mounting
• 3/16 x 7/8 inch key size provides positive rotational drive
• 3/8-inch flange thickness for solid axial stop and support
• Adjustable design allows fine axial positioning of the cutting tool

Compatibility

Designed for use with 2MT Morse taper spindles. Compatible with adjustable adapter nut number 66606 as stated by the manufacturer.

Installation Notes

Installation is performed by a qualified machinist or tool room technician. The machine spindle must be fully stopped and locked out before mounting or removing this assembly. Clean the Morse taper bore and shank thoroughly before insertion to ensure full seating and accurate alignment. Follow the machine tool manufacturer's guidelines and applicable shop safety procedures when securing the drawbar or ejecting the taper.