Jacobs 30453DN MT4 to MT4 Morse Taper Extension Adapter

Product Description

The JACOBS 30453DN is a Morse Taper extension adapter designed to extend the reach of MT4 tooling in machine tool spindles and quills. It accepts an MT4 shank on the inside and presents an MT4 taper on the outside, effectively extending the working depth for drill chucks, drill bits, or other Morse Taper tooling. Constructed from alloy steel with a hardened and ground finish throughout, the 30453DN delivers the dimensional accuracy and surface quality required for precision metalworking applications. The overall length is 10.43 inches with a 5.39-inch projection and a body diameter of 1.89 inches.

This adapter is used in machining environments where additional spindle depth is needed to reach a workpiece or fixture. Typical applications include drill press operations, milling machine setups, and lathe tailstock work where standard MT4 tooling falls short of the required reach. It is installed by machinists, toolroom technicians, and maintenance mechanics working with standard Morse Taper machine tool spindles. The hardened and ground construction ensures repeatable runout performance across production and maintenance machining cycles.

Key Features

• MT4 inside taper accepts standard MT4 shank tooling or adapters
• MT4 outside taper seats directly into MT4 spindles, quills, or tailstocks
• Overall length of 10.43 inches with 5.39-inch projection for extended reach
• Alloy steel construction hardened and ground throughout for dimensional accuracy
• Body diameter of 1.89 inches for rigid support across the extension length

Compatibility

Designed for use with machine tool spindles, quills, and tailstocks that accept an MT4 taper, in combination with MT4-shank drill chucks, drill bits, reamers, and similar Morse Taper tooling.

Installation Notes

Installation is performed by machinists or toolroom technicians. Power down and lock out the machine spindle before seating or removing any Morse Taper tooling. Clean both the adapter taper and the spindle socket with a clean cloth to remove oil, chips, or debris before seating to ensure full contact and minimize runout. Use a drift and the machine's designated drift slot to eject the adapter - never strike the tooling directly with a hammer.