42mm Face Clamping Chuck Weldon Shank 12mm Bore, DIN 69871 Form AD - TECWERK

Reliable clamping and standard conformity deliver consistent tool retention and repeatable run-out for everyday machining. The combination of DIN 69871 Form AD compatibility and a 12 mm Weldon clamping interface supports secure torque transmission and extended process stability. Order the holder directly via Metav Werkzeuge or consult the sales team for detailed advice.

Face clamping holder DIN 69871 Form AD – Weldon clamping Ø 12 mm, SK40, 100 mm projection (TECWERK)

A face clamping holder DIN 69871 Form AD designed to retain cylindrical-shank tools with a Weldon flat for positive drive, suited to SK40 spindles and medium-reach applications.

• Conforms to DIN 69871 Form AD
• Weldon flat for positive torque transmission
• Clamping diameter 12 mm H4 bore tolerance
• SK40 taper with 100 mm projection

Precision clamping for consistent concentricity

The holder's compliance with DIN 69871 and the defined bore tolerance H4 ensure a precise interface between spindle and tool, which translates into repeatable concentricity and stable cutting performance. With a 12 mm clamping diameter, the device is suitable for common cylindrical shank tooling and is engineered to reduce radial run-out. This precision is essential where repeatability and surface finish matter, as consistent positioning of the cutting edge minimises rework and scrap rates.

Reliable positive drive and broad tool compatibility

Equipped with a Weldon flat, the clamping interface provides a positive lateral drive, preventing slippage under torque and enabling secure power transmission during aggressive cuts. The holder accepts tools with a cylindrical shank and a lateral driving flat as specified in DIN 1835-B, so standardised tooling can be used without adaptation. The combination of positive drive and standard conformity supports predictable machining cycles and simplifies tool selection for production processes.

Practical handling that improves shop-floor productivity

A 100 mm projection delivers the extra reach required for fixtures and deeper bores while maintaining stability from the robust D 42 mm body. The SK40 taper guarantees a common spindle fit on many machining centres, enabling fast changeovers and consistent seating. These attributes contribute to shorter setup times and a more efficient workflow, which helps to maintain throughput without compromising accuracy.

Standard-based integration and operational reliability

Designed to match established tooling standards, the unit integrates smoothly into existing tooling systems and inspection routines. The steep taper to DIN 69871 Form AD offers repeatable engagement and straightforward replacement when routine maintenance is due. By favouring components that follow recognised norms, the holder supports long-term process reliability and easier spares management across a shop's tool inventory.

Secure the TECWERK face clamping holder through Metav Werkzeuge for reliable supply and technical consultation; contact info@metav-werkzeuge.com or call +49 2822 7131930 for order and availability

Technical data

• Article number: 2000833727NW
• Manufacturer: TECWERK
• Product type: Face clamping holder
• Standard: DIN 69871 Form AD

Core dimensions

• Projection A: 100 mm
• Diameter D: 42 mm
• Clamping diameter: 12 mm
• Bore tolerance: H4
• Taper: SK40

Features and compatibility

• Weldon flat for lateral drive
• Accepts cylindrical shank tools (DIN 1835-B)
• Steep taper according to DIN 69871 Form AD

FAQ

What standard does the holder conform to?
The holder conforms to DIN 69871 Form AD, ensuring compatibility with spindles and holders specified to that standard.

Which tool shanks can be used with this holder?
Tools with a cylindrical shank and a lateral driving flat to DIN 1835-B can be used; the clamping interface is for a 12 mm shank.

What taper is required for spindle fit?
An SK40 taper is required; the holder is manufactured to fit SK40 spindles for secure seating.

Why is the bore tolerance H4 important?
H4 tolerance provides a precise bore fit, improving concentricity and reducing run-out during machining operations.

What are the main dimensions for planning and setup?
Key dimensions are a 100 mm projection (A) and a 42 mm body diameter (D), with a 12 mm clamping diameter for the tool shank.

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