MT1 (Internal) to MT3 (External) Morse Taper Sleeve (MPN: 3900-1841)
This listing is for a high-quality, precision-ground MT1 to MT3 Morse Taper sleeve. This is the essential adapter required to mount a tool with a male MT1 shank (like a small drill bit, reamer, or live center) into a machine spindle that accepts a male MT3 taper.
This is a common adapter for medium-sized lathes, drill presses, and milling machines.
Technical Specifications & Improvements
MPN: 3900-1841
Internal Taper (Female): MT1 (Morse Taper #1)
External Taper (Male): MT3 (Morse Taper #3)
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 MT1 live center or drill chuck arbor in an MT3 tailstock.
Drill Press: Mount a small MT1 taper-shank drill bit in a larger MT3 spindle.
Note: This sleeve adapts a smaller MT1 tool to fit into a larger MT3 spindle.
