Value Collection SC00186148 MT1 to MT4 Morse Taper Extension

Product Description

The VALUE COLLECTION SC00186148 is a Morse taper extension adapter designed to increase the reach of MT1-shanked tooling inside MT4-spindle machines. The adapter accepts an MT1 inside taper and presents an MT4 outside taper, allowing technicians to seat smaller-shank drills, reamers, or other MT1 tooling into larger machine spindles without a reduction sleeve. Overall length (OAL) is 7.5 inches, giving added depth in deep-bore or extended-reach applications. The body is medium carbon steel with a soft body and hardened tang, balancing machinability with resistance to drive-end wear during tool changes.

This adapter is suited for manual and CNC drill presses, lathes, and milling machines where the spindle accepts an MT4 taper and the installed tooling carries an MT1 shank. Typical users include machine shop technicians, tool and die makers, and maintenance machinists who need to run smaller-diameter tooling in a larger-taper spindle without changing out the spindle itself. The 7.5-inch OAL makes this adapter particularly useful when additional clearance is needed between the spindle nose and the workpiece.

Key Features

• MT1 inside taper accepts standard MT1-shank tooling
• MT4 outside taper seats directly into MT4 machine spindles
• 7.5-inch OAL provides extended reach for deep-bore setups
• Medium carbon steel body with soft construction and hardened tang for durability at the drive end
• UNSPSC code 27112800 for procurement and catalog alignment

Compatibility

Designed as an OEM-style replacement or standard fitment adapter for machine tool spindles accepting an MT4 outside taper with MT1 inside taper tooling requirements.

Installation Notes

Installation and removal should be performed by a qualified machinist following standard machine tool lockout and tagout procedures before inserting or extracting any taper adapter. Clean both the spindle bore and the adapter taper surfaces thoroughly before seating to ensure full contact and prevent fretting. Use a proper drift and mallet to remove the adapter from the spindle; never attempt to strike the tooling or spindle directly. Follow the machine manufacturer guidelines for taper engagement and tool retention.