215mm Extension Sleeve MK4 to MK2 Hardened Ground, DIN 2187 - TECWERK

Combining DIN 2187 precision with a hardened and ground finish and a Morse taper transition from MK4 to MK2, this extension sleeve provides stable tool seating and consistent run-out control for demanding machining operations; secure supplies and technical advice are available through Metav Werkzeuge.

Extension Sleeve DIN 2187 MK4 x MK2, hardened & ground — TECWERK

A Extension Sleeve DIN 2187 MK4 x MK2 (TECWERK) engineered to adapt larger spindles to MK2 tools while maintaining concentricity and reliable clamping in industrial machine shops.

• DIN 2187 compliance for tool holders
• Morse taper MK4 to MK2 adaptation
• Hardened and ground inside and out
• Precision dimensions D 30 mm, L 215 mm

High-precision adaptation for consistent machining results

The sleeve is designed to provide a secure Morse taper transition between MK4 and MK2 interfaces, ensuring reduced runout and stable tool seating during operation. Manufactured to DIN 2187 and executed in a precision accuracy version, the component is hardened and ground both internally and externally, which minimises deformation under load and preserves concentricity over repeated use. This translates into fewer rejects, longer tool life and predictable performance in milling, drilling and reaming applications where concentricity is critical.

Robust construction that supports productive uptime

A fully worked and finished sleeve delivers mechanical reliability: the hardened substrate resists wear, while the ground surfaces ensure a close fit with the mating tapers. The combination of surface treatment and accuracy grading reduces fretting and micromovement between spindle and tool, which supports repeatable setups and limits vibration. With a nominal diameter of D 30 mm and a total length of 215 mm, this component is suitable for operations requiring extended reach without compromising stability.

Practical compatibility and quick integration into existing toolrooms

The sleeve is intended for tools presented with a Morse taper, facilitating straightforward adaptation of MK2 shanks to MK4 spindles. Key dimensions such as L1 97.5 mm and overall length 215 mm allow planners to check clearance and engagement depth at a glance. Installation is simple: clean contact surfaces, press-fit the sleeve according to standard machine practice and verify seating; correct mounting secures the intended concentricity benefits. Regular inspection of the tapered faces and routine cleaning will maintain the performance advantages over long service intervals.

For tailored advice on application and delivery from Metav Werkzeuge — including compatibility checks and supply from Emmerich — contact our technical team via info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• Article number: 2000832364NW
• Standard: DIN 2187
• Type: Extension sleeve
• Brand: TECWERK

Facts

• Total length L2: 215 mm
• Engagement length L1: 97.5 mm
• Diameter D: 30 mm
• Inner taper: MK2
• Outer taper: MK4

Special features

• Hardened and ground inside and out
• Accuracy execution (precision version)
• For tools with Morse taper
• Designed per DIN 2187

FAQ

What applications is this extension sleeve suitable for?
The Extension Sleeve DIN 2187 MK4 x MK2 (TECWERK, SKU 2000832364NW) is suitable for adapting MK2 shank tools to MK4 spindles in machining tasks where concentricity and stiffness are required.

How does the hardened and ground finish benefit workshop use?
A hardened and ground finish on the sleeve ensures wear resistance and precise mating surfaces, which for the TECWERK extension sleeve reduces runout and extends the life of both the sleeve and the mounted tools.

Are the dimensions compatible with standard Morse taper tooling?
Yes; the component follows DIN 2187 and provides an MK4 outer taper to accept an MK2 inner taper, with key dimensions D 30 mm, L2 215 mm and L1 97.5 mm for easy verification against existing tooling.

What maintenance is recommended to preserve accuracy?
Keep the tapered faces free from debris and corrosion, inspect mating surfaces for nicks, and follow standard machine-shop mounting procedures; regular checks maintain the precision benefits of this TECWERK extension sleeve.

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