Value Collection 214-8034 MT3 Inside MT4 Outside Reducing Sleeve

Product Description

The VALUE COLLECTION 214-8034 is a standard Morse taper reducing sleeve designed to adapt an MT3 inside taper to an MT4 outside taper. It allows a tool or accessory with an MT3 shank to be seated and driven in a machine spindle or socket bored to MT4. The sleeve is constructed with a soft body and a hardened tang, providing the necessary toughness at the drive point while keeping the body machinable if needed. Overall length is 140 millimeters with a body diameter of 32.4 millimeters and a 3/4-inch projection. This part is installed by machinists and toolroom technicians on lathes, milling machines, drill presses, and similar equipment.

This reducing sleeve is suited for use in machine shop and industrial environments where tooling with different Morse taper sizes must be run in the same spindle without a full socket swap. Typical applications include adapting drill chucks, centers, end mill holders, or other MT3-shank tooling into MT4 spindles or tailstocks. The hardened tang engages the spindle drift slot for positive tool ejection. This part ships as a single unit and is appropriate for both production and maintenance toolroom use.

Key Features

• MT3 inside taper accepts MT3-shank tooling directly
• MT4 outside taper seats securely in MT4 spindles and tailstocks
• Soft body with hardened tang for durability at the ejection point
• 3/4-inch projection for proper tool engagement and clearance
• 140 millimeter overall length with 32.4 millimeter body diameter
• Single-piece unit with no assembly required

Compatibility

Designed as a standard reducing sleeve for machine tool spindles and tailstocks bored to MT4 that require operation of MT3-shank tooling including drill chucks, live centers, and end mill holders.

Installation Notes

Installation is performed by machinists or toolroom technicians. Always power down and lock out the machine spindle before inserting or removing taper tooling. Clean both the sleeve bore and the spindle socket thoroughly before seating to ensure full taper contact and prevent fretting. Use a proper drift bar in the spindle slot to eject the sleeve cleanly without striking the tooling directly.