265mm Morse Taper Extension Sleeve MT4×MT4 Hardened Ground, DIN 2187 - TECWERK

Take advantage of the combination of DIN 2187 conformity, fully hardened and ground surfaces and precise MK4 taper fit to maintain tool concentricity and production reliability; order directly via Metav Werkzeuge or consult the team for application advice.

Extension sleeve DIN 2187 MK4×MK4 — hardened and ground, 265 mm overall length (TECWERK)

The Extension sleeve DIN 2187 MK4×MK4 is a hardened, ground adapter for extending Morse taper tooling, designed for accurate tool holding and consistent centring in machine spindles and tailstocks.

• DIN 2187 standard, precision version
• Fully hardened and ground inside and out
• For tools with Morse taper MK4 to MK4
• 265 mm overall length, 48 mm diameter

Reliable accuracy for repeatable machining results

The extension sleeve is manufactured to DIN 2187, ensuring defined tolerances and a reproducible interface for Morse taper tooling. Its hardened and ground inner and outer surfaces reduce wear and maintain tight contact between tool and adapter, which improves concentricity and minimises radial deviation during machining. For production environments where tooling repeatability matters, the precision finish translates directly into fewer quality checks and less scrap.

Straightforward compatibility and secure seating

With both inner and outer tapers specified as MK4, the adapter matches standard Morse taper toolholders and accessories, enabling seamless integration into existing setups. The geometric dimensions — 48 mm outside diameter and an overall length of 265 mm with a usable L1 of 147.5 mm — provide predictable extension while preserving rigidity. Because the taper fits are ground to specification, seating is secure and the risk of slippage under load is significantly reduced, which supports consistent cycle times in workshop and light production use.

Built for longevity and low maintenance in the workshop

The all-hardened construction combined with precision grinding reduces fretting and surface damage, extending service life compared with non-hardened alternatives. The design requires minimal upkeep: regular inspection and light cleaning of the taper seats are usually sufficient to retain accurate seating. Given the material treatment and finish, the adapter offers a long service interval and reliable performance, contributing to stable production processes and lower total cost of ownership over time.

For tailored technical advice or to secure supply from Metav Werkzeuge in Emmerich, contact Metav Werkzeuge at info@metav-werkzeuge.com or call +49 2822 7131930 to confirm compatibility and delivery details

Technical Data

• Article number: 2000832366NW

• Standard: DIN 2187

• Product type: Extension sleeve

• Inner taper: MK4

• Outer taper: MK4

• Overall length: 265 mm

• Diameter D: 48 mm

• Usable length L1: 147.5 mm

• Accuracy version

• Fully hardened and ground inside and out

• For tools with Morse taper

• Packaging unit: 1

FAQ

Is this adapter compatible with standard MK4 toolholders?
Yes. The Extension sleeve DIN 2187 MK4×MK4 from TECWERK is specified with both inner and outer MK4 tapers and is intended for use with standard Morse taper tooling (SKU 2000832366NW).

What benefits does the hardened and ground finish provide?
The hardened and ground surfaces on this extension sleeve increase wear resistance, improve seating accuracy and reduce runout compared with untreated adapters, enhancing machining consistency.

What are the key dimensions to consider when fitting this sleeve?
Key dimensions are an overall length of 265 mm, an outside diameter of 48 mm, and a usable length L1 of 147.5 mm, which determine extension and clearance in the machine setup.

Can the sleeve be used for heavy-duty turning and milling?
The precision finish and hardened construction improve load capacity compared with non-hardened adapters; suitability for heavy-duty operations should be assessed against specific machine and tooling loads.

How often should the taper seats be inspected?
Regular visual inspection and light cleaning after routine use are recommended; frequency depends on operating conditions, but inspections before critical runs help maintain accuracy.

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