95mm MK4 Taper Sleeve With Steep Taper DIN 69871 Form AD, Hardened And Ground - TECWERK

Take advantage of the combination of precise taper geometry, hardened and ground surfaces for long service life, and compatibility with MK4 Morse taper tools for reliable spindle connections; order the taper sleeve directly via Metav Werkzeuge or ask our consultants for advice.

Taper sleeve DIN 69871 Form AD — MK4 to SK40, A 95 mm (TECWERK)

The taper sleeve DIN 69871 Form AD, MK4 to SK40, A 95 mm is a hardened and ground adapter designed to seat Morse taper tools securely in SK40 spindles for machining applications.

• Hardened and ground finish for precision fit
• Steep taper to DIN 69871 Form AD
• Accepts tools with Morse taper and ejector lugs
• Compatible MK4 to SK40 spindle interface

Precise taper geometry for consistent machining results

The connection follows DIN 69871 Form AD, providing a steep, standardised taper that promotes accurate axial alignment and concentricity. With an outer diameter of 48 mm and an engagement length of A 95 mm, the adapter ensures a reproducible mechanical interface between the machine spindle and the tool shank. The consequence is less run-out, reduced vibrations and improved surface finish on workpieces, which supports higher process reliability and lower scrap rates in production environments.

Faster, safer tool changes with secure retention

Designed to accept tools with a Morse taper and ejector lugs, the sleeve enables straightforward release and seating of tooling without elaborate procedures. The engagement depth and taper angle are optimised to provide secure clamping during heavy machining while allowing controlled ejection when required. This balance reduces changeover times and contributes to uninterrupted machining cycles — a clear operational advantage for busy workshops and production lines.

Surface treatment that extends service life

The adapter is case-hardened and ground, a combination that provides surface wear resistance together with the dimensional precision needed for repeatable seating. Hardening increases longevity under cyclic loading, while the ground finish maintains the required contact geometry for dependable clamping force. For maintenance, periodic inspection for wear on the contact surfaces is sufficient to preserve performance without complex servicing.

Practical compatibility across modern machine shops

As a component in clamping and tool-holding systems, the sleeve bridges MK4 tooling and SK40 spindles, making it suitable for a wide range of drilling, reaming and light milling operations where Morse taper shanks are used. The unitary design simplifies inventory management by reducing the need for multiple bespoke adaptors, helping workshops and toolrooms maintain efficient stock levels and consistent tooling interfaces.

For fast availability and tailored advice on integrating the TECWERK taper sleeve into existing tool-holding systems, contact Metav Werkzeuge for stock checks and technical guidance at info@metav-werkzeuge.com or +49 2822 7131930

Technical data

• Article number: 2000833794NW
• Manufacturer: TECWERK
• Product type: Taper sleeve
• Description: DIN 69871 Form AD adapter MK4 to SK40

Core specifications

• Norm: DIN 69871 Form AD
• Shank size: MK4
• Spindle interface: SK40
• Engagement length A: 95 mm
• Diameter D: 48 mm

Features

• Steep taper to DIN 69871 Form AD
• Case-hardened and ground
• Accepts Morse taper tools with ejector lugs
• Packaging unit: 1

FAQ

What tolerance and repeatability can be expected from this adapter?
The taper sleeve to DIN 69871 Form AD is manufactured with ground contact faces to ensure consistent seating and repeatable concentricity for MK4 to SK40 connections.

Can Morse taper shank tools with ejector lugs be used directly with this sleeve?
Yes — the adapter is designed to accept tools with a Morse taper and ejector lugs, enabling controlled ejection and reliable retention during machining.

Is the sleeve suitable for heavy machining and high loads?
The case-hardened and ground construction of the sleeve provides improved wear resistance and stable clamping, making it suitable for demanding light- to medium-duty machining operations.

How does the engagement length affect tool holding?
An engagement length of A 95 mm increases contact area between tool and adapter, improving axial support and reducing the likelihood of slippage under load.

Which machines are compatible with this adapter?
The sleeve is intended for machine spindles that accept SK40 tooling interfaces and for tools fitted with an MK4 Morse taper shank

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