Jacobs 30429DN Morse Taper Reducing Sleeve MT3 MT5

Product Description

The JACOBS 30429DN is a standard Morse taper reducing sleeve designed to adapt MT3 inside taper tooling to MT5 outside taper spindles. The sleeve features a soft body with a hardened tang for durability under load. At 6.12 inches overall length with a 0.25 inch projection, it provides a secure, concentric fit between mismatched taper sizes. Machinists and tool room technicians use this type of adapter to mount drills, reamers, and other MT3-shank tools in machines equipped with MT5 spindle bores without requiring a tool change or spindle swap.

This reducing sleeve is suited for use in metalworking machine tools such as drill presses, milling machines, lathes, and boring mills where the spindle taper is larger than the tool shank taper. It is a direct-fit solution when an MT3 tool must run in an MT5 spindle. The hardened tang engages the spindle drift slot for positive tool ejection. Typical installations are found in general machining, toolroom, and production environments.

Key Features

• MT3 inside taper accepts standard MT3 shank tooling
• MT5 outside taper seats directly in MT5 spindle bores
• Soft body with hardened tang for reliable drift-out ejection
• 0.25 inch projection for proper tool seating depth
• 6.12 inches overall length for stable taper engagement

Compatibility

Designed as an OEM-style reducing sleeve for machine tool spindles with an MT5 bore requiring MT3 shank tooling. Specific machine model compatibility was not provided in available product data.

Installation Notes

Installation is performed by qualified machinists or tool room technicians. Power down and lock out the machine spindle before inserting or removing the sleeve. Ensure both taper surfaces are clean and free of chips, oil, or burrs before seating. Use a drift bar through the spindle slot against the hardened tang to eject the sleeve - do not strike the tooling directly.