Collis Tool 60733 MT3 to MT3 Morse Taper Extension Socket

Product Description

The COLLIS TOOL 60733 is a Morse taper extension socket designed to extend the reach of MT3 tooling in machine tool spindles and tailstocks. It accepts an MT3 inside taper and presents an MT3 outside taper, effectively adding length to the tooling stack without changing the taper size. Built from steel, the 60733 measures 11.25 inches overall length, making it a practical solution when standard tool length falls short of the workpiece. Machinists, tool-and-die workers, and maintenance technicians use this extension when deep-hole drilling, boring, or reaming setups require additional reach in a lathe, drill press, or machining center.

This extension socket is suited for machine shop environments where MT3-spindle equipment is in use, including engine lathes, bench drill presses, and knee mills with MT3 tailstocks or quills. The matching MT3-in to MT3-out configuration allows the installer to maintain the same tooling interface on both ends, keeping setup changes minimal. It is also used in production and maintenance environments where a fixed spindle depth would otherwise prevent reaching the target bore location.

Key Features

• MT3 inside taper accepts standard MT3 shanks and tooling
• MT3 outside taper fits directly into MT3 spindles and tailstocks
• 11.25-inch overall length provides extended reach in deep setups
• Steel construction resists deflection and wear under cutting loads
• Same taper size on both ends eliminates the need for adapter changes

Compatibility

Designed as an OEM-style extension for machine tools equipped with MT3 spindles, tailstocks, or quills, including engine lathes, drill presses, and milling machines that use the Morse Taper 3 standard interface.

Installation Notes

Installation is performed by qualified machinists or maintenance technicians familiar with Morse taper tooling. Power down and de-energize the machine spindle completely before seating or removing the extension. Clean both the socket bore and the mating taper shank with a lint-free cloth to remove oil, chips, and debris before insertion, as contamination will prevent full taper engagement and can cause tool pull-out under load. Use a drawbar or drift key as appropriate for the host machine to secure or release the extension.