Value Collection 214-8135 MT3 Inside MT5 Outside Reducing Sleeve

Product Description

The VALUE COLLECTION 214-8135 is a standard Morse taper reducing sleeve designed to adapt MT3 inside taper tooling to MT5 outside taper spindles. Machined and hardened and ground throughout, this sleeve provides a rigid, accurate connection between mismatched taper sizes commonly encountered in milling, drilling, and lathe applications. The sleeve measures 268mm in overall length with a 36mm body diameter and features a 0.25 inch projection. The hardened and ground construction ensures concentricity and long service life in demanding machine shop environments. This type of adapter is a standard component in metalworking tool setups and is installed by machinists and tool-room technicians.

This reducing sleeve is suited for use in machine shop environments where MT3 tooling such as drill chucks, end mill holders, or drill shanks must seat into an MT5 spindle or socket. Typical applications include vertical milling machines, drill presses, and lathes with MT5 spindles that require the use of MT3-shank tooling. The sleeve eliminates the need for a full tool changeover when adapting between taper sizes on compatible machines.

Key Features

• MT3 inside taper accepts standard MT3-shank tooling
• MT5 outside taper seats directly into MT5 spindles or sockets
• Hardened and ground throughout for concentricity and wear resistance
• 268mm overall length accommodates deep-spindle machine configurations
• 36mm body diameter provides a solid, stable adapter body
• 0.25 inch projection for positive tool ejection

Compatibility

Designed as an OEM-style replacement and standard adapter for metalworking machines equipped with MT5 spindles requiring MT3 inside taper tooling.

Installation Notes

Installation is performed by machinists or tool-room technicians. Always power down and lock out the machine spindle before inserting or removing taper sleeves. Clean both the sleeve taper and the spindle bore thoroughly to remove chips, oil film, and debris before seating the sleeve, as contamination will affect concentricity. Use a drift and knockout bar in the spindle slot to remove the sleeve safely; never strike the tooling directly.