140mm Reducer Sleeve MK4 to MK3 Hardened And Ground DIN 2185 - TECWERK

Take advantage of the combination of standardised design, hardened and precision-ground finish, and a reliable MT4-to-MT3 conversion to maintain concentricity and reduce tool changes; order the adaptor directly via Metav Werkzeuge or contact our consultants for application advice.

TECWERK Reduction sleeve DIN 2185 MT4→MT3, hardened and ground

The TECWERK reduction sleeve MT4→MT3 is a precision adapter sleeve for converting a Morse taper MT4 spindle to accept MT3 tooling, compliant with DIN 2185 for workshop and industrial applications.

• DIN 2185 compliant design
• Hardened and precision-ground finish
• Converts MT4 to MT3 Morse taper
• 140 mm overall length

Reliable taper conversion to keep production moving

The reduction sleeve provides a straightforward mechanical solution for tool compatibility: adapting an MT4 receptacle to accept MT3 tooling while maintaining runout within the expectations of the DIN 2185 standard. By following an established norm, the adapter gives a verifiable basis for procurement and quality assurance. This reduces the need for multiple spindle changes or additional tooling investments and supports a smoother production flow through fewer interruptions. The conformity to standards ensures predictable interchangeability in workshop and industrial environments.

Built for concentricity and long service life

Constructed hardened and precision-ground both internally and externally, the sleeve is designed to preserve axial accuracy and resist wear over prolonged use. Hardening increases surface strength and fatigue resistance, while grinding refines contact surfaces to improve seating and minimise runout. The combination results in a durable adapter that keeps cutter concentricity stable under repeated mounting cycles. The 140 mm overall length provides sufficient engagement for secure seating without excessive protrusion, balancing stability and accessibility for common machining setups.

Straightforward fitment and practical workshop benefits

Installation follows the simple press-fit principle of Morse tapers: the external taper locates in the spindle cone and the internal taper accepts the tool shank, creating a friction fit that centres automatically. Because the sleeve is specified for tools with a Morse taper, compatibility is explicit and tool selection becomes easier for maintenance teams and production planners. The robust finish reduces the risk of fretting and extends service intervals, while the standardised format aids inventory management in workshops, production lines and service departments.

For dependable taper adaptation and technical advice from our Emmerich quality hub, contact Metav Werkzeuge to order the TECWERK reduction sleeve MT4→MT3 or request specification support via info@metav-werkzeuge.com or +49 2822 7131930

Technical data

• SKU: 2000832357NW
• UID: 2000832357NW
• Norm: DIN 2185
• Manufacturer: TECWERK

Facts

• Overall length: 140 mm
• Packaging unit: 1

Special features

• Fully hardened
• Inner and outer precision-ground
• For tools with Morse taper
• Inner taper: MT3
• Outer taper: MT4

FAQ

Is this sleeve compliant with industry standards?
Yes. The TECWERK reduction sleeve is manufactured to DIN 2185, ensuring standardised dimensions and reliable interchangeability for taper adapters.

Can the sleeve be used on all MT4 spindles?
The adapter is designed for MT4 receptacles and accepts MT3 tooling; the fit follows Morse taper principles and the sleeve is hardened and precision-ground to ensure consistent seating.

How does the hardened and ground finish benefit workshop use?
Hardening increases wear resistance and fatigue strength, while the precision-ground surfaces improve seating accuracy and reduce runout, extending service life and lowering maintenance needs.

Manufacturer / Responsible: NORDWEST Handel AG, Robert-Schuman-Straße 17, 44263 Dortmund