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The VALUE COLLECTION SC00185132 is an MT4 inside Morse taper adapter that converts a standard Morse Taper No. 4 socket to a straight shank interface. At 6 inches overall length, this adapter is machined from medium carbon steel and hardened and ground throughout for dimensional accuracy and surface durability. It is used in machine tool setups where a straight-shank tool or accessory must be held in a spindle, tailstock, or quill with an MT4 bore. Machinists and toolroom technicians install this adapter to extend tooling compatibility without retooling the machine spindle.
This adapter fits standard MT4 spindle bores found on lathes, milling machines, drill presses, and similar machine tools. It is suited for both production and jobsite toolroom environments where frequent tooling changes require reliable, repeatable taper-to-shank conversion. The hardened and ground finish ensures consistent seating in the taper bore and minimizes runout at the straight shank end. Typical applications include holding straight-shank drill chucks, boring heads, and similar accessories in MT4-equipped machines.
Designed as a standard replacement and conversion adapter for machine tools equipped with an MT4 spindle bore, including lathes, milling machines, and drill presses requiring a straight shank output interface.
Installation is performed by qualified machinists or toolroom technicians. Ensure the machine spindle or tailstock is fully stopped and locked before inserting or removing the adapter. Clean the MT4 bore and the taper shank of the adapter with a lint-free cloth to remove oil, chips, and debris before seating to prevent fretting and ensure full taper contact. Use a soft mallet or drawbar as appropriate to the machine design when seating or ejecting the adapter, and never use steel hammers directly on the taper shank.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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