45mm Face Clamp Holder Weldon Shank DIN 69871 Form AD, 20mm Clamping Diameter / A35mm - TECWERK

Take advantage of a secure Weldon drive and the repeatable seating of the DIN 69871 Form AD taper to keep tool changes quick and spindle runout low; with a 20 mm clamping bore and H4 tolerance the holder supports precise, reliable machining. Order the holder directly via Metav Werkzeuge or ask their consultants if additional technical matching is required.

TECWERK Weldon toolholder — DIN 69871 Form AD, SK40, clamping Ø 20 mm

TECWERK Weldon toolholder DIN 69871 Form AD is a SK40 steep-taper toolholder for use with tools having a cylindrical shank and a lateral drive flat, intended for secure mounting in milling and drilling spindles

• Weldon lateral drive flat for secure torque transfer
• Steep taper to DIN 69871 Form AD, SK40
• Clamping bore Ø 20 mm, tolerance H4

Reliable taper interface for consistent spindle performance

The steep taper specified as DIN 69871 Form AD with an SK40 connection provides a stable, concentric interface between spindle and holder. This geometry reduces radial runout and contributes to predictable tool behaviour during high-precision operations. The nominal bore tolerance H4 ensures that the clamping seat delivers repeatable concentricity, which is particularly relevant for operations that demand tight tolerances or minimal rework. By favouring established standards, the holder supports straightforward integration into existing machine tool setups and simplifies quality control of mounted tools.

Positive drive with Weldon flat for slip-free machining

Equipped for tools with a cylindrical shank and a lateral drive flat to DIN 1835‑B, the Weldon drive arrangement prevents rotation between tool and holder under heavy cutting loads. The specified 20 mm clamping bore is intended for cylindrical shanks of that diameter, offering a robust mechanical engagement without relying solely on friction. This design reduces the risk of slippage during interrupted cuts and improves torque transmission, which in turn helps maintain surface finish and tool life. For production environments where secure tool retention is essential, the positive-drive arrangement adds a direct, mechanical safeguard.

Compact dimensions that suit workshop workflows

With a projection length of 35 mm and an outer diameter of 45 mm, this holder combines a compact footprint with sufficient material bulk for stable clamping. The modest projection reduces cantilever effects on the spindle and supports better dynamic stiffness, helping to keep vibration and chatter to a minimum. The straightforward geometry and compatibility with SK40 spindles make the component a practical choice for toolrooms and industrial shops seeking a balance between accessibility for tool changes and the rigidity needed for repeatable machining cycles. Integration benefits include reduced setup time and predictable tool offsets for programming.

Contact Metav Werkzeuge for technical matching of TECWERK toolholders to machine tapers — phone +49 2822 7131930 or eMail info@metav-werkzeuge.com to confirm suitability and ordering details

Technical data

• Article number: 2000833739NW
• Label: Flächenspannfutter DIN 69871AD Weldon Spann-D.20mm SK40 A.-L.35mm TECWERK
• Product type: Face clamping holder
• Manufacturer: TECWERK

Facts

• Taper standard: DIN 69871 Form AD
• Taper size: SK40
• Clamping diameter: 20 mm
• Bore tolerance: H4
• Projection A: 35 mm
• Outer diameter D: 45 mm

Special features

• Weldon lateral drive flat to DIN 1835-B
• For tools with cylindrical shank and lateral drive flat
• Steep taper design for low runout
• Packaging unit: 1
• Brand: TECWERK

FAQ

What taper standard does the holder use? The holder uses the DIN 69871 Form AD steep taper with an SK40 connection, as stated for this TECWERK Weldon toolholder (SKU 2000833739NW).

Which tool shank types are compatible? Tools with a cylindrical shank and a lateral drive flat to DIN 1835‑B are compatible with this holder; the design supports positive drive engagement.

What is the clamping diameter and tolerance? The clamping bore is 20 mm with a bore tolerance of H4, providing precise and repeatable seating for matching shanks.

What are the key dimensions to consider for setup? Important dimensions are projection A = 35 mm and outer diameter D = 45 mm; these affect reach and stiffness in the spindle.

Is this holder suitable for heavy-duty machining? The Weldon drive and steep taper provide secure torque transfer and stable seating suitable for demanding operations where positive drive and low runout are required.

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