300mm Extension Sleeve MK4 to MK5 Hardened Ground, DIN 2187 - TECWERK

Take advantage of a hardened, ground construction and DIN 2187 conformity to maintain spindle accuracy while extending reach; the MT4→MT5 taper pairing and 300 mm overall length deliver reliable tool support and repeatable concentricity in metalworking applications. Order the extension sleeve directly via Metav Werkzeuge or consult the team for application advice.

Morse taper extension sleeve MT4×MT5 — TECWERK, hardened and ground, DIN 2187, 300 mm

The Morse taper extension sleeve MT4×MT5 provides a hardened, ground sleeve for extending Morse taper tooling, optimised for metalworking and drilling operations where increased reach and maintained accuracy are required

• DIN 2187 standard compliance
• Hardened and ground inside and out
• 300 mm overall length for extended reach
• 63 mm outer diameter for stable support

Maintain machining accuracy over extended reach

The hardened and precisely finished inner and outer surfaces are designed to preserve concentricity when a tool is mounted into a smaller spindle via a larger taper. Conformity with DIN 2187 ensures a standardised fit and predictable performance across compatible tooling systems. By combining a controlled MT4 outside taper with an MT5 inside taper, the sleeve reduces radial runout and vibration compared with ad hoc adapters, which helps to secure cutting performance and surface quality in everyday production.

Built for industrial stability and repeatability

Robust dimensions and surface treatment are the basis for long-term stability: an outer diameter of 63 mm and an overall length of 300 mm provide the mass and support needed for longer overhangs, while the L1 measurement of 182.5 mm defines the usable insertion depth. The fully hardened and ground execution resists wear at contact faces, so the adapter keeps its tolerance profile through repeated tool changes and heavy-duty cycles. This reliability benefits workshops seeking consistent, measurable results from their taper tooling.

Simple integration and practical handling in the workshop

The sleeve is intended for tools with a Morse taper interface and works as a direct mechanical solution to increase reach without compromising interchangeability; standard compliance allows straightforward replacement and compatibility checks. Install and remove the adapter using standard practice for Morse tapers—ensure clean, dry contact faces and verify seating to achieve optimal concentricity. For complex setups or specific material challenges, technical consultation is available to align the sleeve’s properties with the intended application.

For application advice, stock availability and fast delivery from Emmerich, contact Metav Werkzeuge — info@metav-werkzeuge.com or call +49 2822 7131930 to discuss the TECWERK MT4×MT5 extension sleeve and compatibility with existing tooling.

Technical Data

• Article number: 2000832367NW
• Label: Verlängerungshülse DIN 2187 MT4×MT5 gehärtet und geschliffen
• Manufacturer: TECWERK

Facts

• Standard: DIN 2187
• Overall length (L2): 300 mm
• Usable insertion length (L1): 182.5 mm
• Outer diameter (D): 63 mm

Special features

• Hardened and ground inside and out
• Outside taper: MT4 (Morse taper 4)
• Inside taper: MT5 (Morse taper 5)
• For tools with Morse taper interfaces
• Packaging unit: 1

FAQ

What standard does this extension sleeve conform to?
The extension sleeve conforms to DIN 2187, ensuring standardised dimensions and fit for compatible Morse taper tooling.

Can this sleeve be used with MT4 spindles and MT5 tools?
Yes, the sleeve is designed with an MT4 outside taper and an MT5 inside taper to accept MT5 taper tools in MT4 applications while maintaining accuracy.

What are the key dimensions to check for fitment?
Relevant dimensions include the overall length 300 mm, usable insertion length 182.5 mm, and outer diameter 63 mm; these help assess reach and support for the application.

Is the surface finish suitable for heavy-duty workshop use?
The adapter’s fully hardened and ground surfaces are intended to resist wear and retain concentricity under frequent tool changes and industrial use.

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