Jacobs 30447DN Morse Taper Extension Adapter MT3 Inside MT2

Product Description

The JACOBS 30447DN is a Morse taper extension adapter designed to extend reach between machine spindles and tooling in lathe, drill press, and milling applications. It accepts an MT3 inside (female) taper and presents an MT2 outside (male) taper, allowing tools with a smaller taper shank to be used in a larger spindle bore. The adapter is machined from alloy steel and hardened and ground throughout, providing the dimensional accuracy and surface finish required for repeatable, concentric tool holding. Overall length is 7.72 inches with a 4.41-inch projection and a body diameter of 1.42 inches.

This adapter is suited for machine shop and toolroom use wherever a Morse taper size mismatch exists between a spindle and a toolholder or cutting tool. Typical applications include drill presses, engine lathes, and vertical mills running MT2-shank tooling in MT3 spindles. It is installed by machinists and toolroom technicians as a standard workholding accessory. The hardened and ground construction makes it appropriate for production environments where runout and wear resistance matter.

Key Features

• MT3 inside taper accepts MT3-shank toolholders and adapters
• MT2 outside taper fits MT3 spindle bores for size-up extension
• Hardened and ground throughout for tight tolerances and long service life
• Alloy steel construction resists deformation under cutting loads
• 7.72-inch overall length with 4.41-inch projection extends tool reach
• 1.42-inch body diameter provides rigid support along the shank

Compatibility

Designed for use in any machine spindle with an MT3 bore requiring MT2 outside taper tooling; consult machine documentation to confirm taper size and tang drive requirements before installation.

Installation Notes

A qualified machinist or toolroom technician should install this adapter. Power down and lock out the machine before inserting or removing any taper adapter. Clean taper bores and shanks thoroughly before seating to prevent fretting and runout errors. Never strike the adapter with a steel hammer; use a brass drift or taper-removal wedge through the spindle drift slot to break the taper seat.