MT2 (Internal) to MT4 (External) Morse Taper Sleeve (MPN: 3900-1844)
This listing is for a high-quality, precision-ground MT2 to MT4 Morse Taper sleeve. This is the essential adapter required to mount a tool with a male MT2 shank (like a drill bit, reamer, or live center) into a machine spindle that accepts a male MT4 taper.
This is a common adapter for medium-to-large sized drill presses, lathes (tailstock), and milling machines.
Technical Specifications & Improvements
MPN: 3900-1844
Internal Taper (Female): MT2 (Morse Taper #2)
External Taper (Male): MT4 (Morse Taper #4)
Quality Enhancement: Hardened & Fully Precision Ground This adapter is made from high-grade tool steel which is both hardened and precision ground.
Hardened: Resists wear, nicks, and damage from tool insertion, ensuring a long service life.
Precision Ground (Internal & External): This is the most critical feature. The inside and outside tapers are both ground to a smooth, concentric finish. This ensures a perfect fit, eliminates wobble, and guarantees your tool spins with the lowest possible runout (T.I.R.).
Common Applications
Lathe: Use an MT2 live center or drill chuck arbor in an MT4 tailstock.
Drill Press: Mount an MT2 taper-shank drill bit in a larger MT4 spindle.
Milling Machine: Adapt an MT2 tool for an MT4 spindle (for drilling/reaming).
Note: This sleeve adapts a smaller MT2 tool to fit into a larger MT4 spindle.
