4mm NC Spot Drill HSS-Co 120° Right-Hand Shank Cylindrical DIN 1835-A - TECWERK

Take advantage of precise centring, durable HSS‑Co construction and a 120° tip for fast, repeatable spot‑drilling and chamfering in one pass. Order the NC centre drill directly via Metav Werkzeuge or ask our consultants if needed.

NC centre drill D.4 mm HSS‑Co 120° – TECWERK

The NC centre drill D.4 mm HSS‑Co 120° TECWERK is a machine‑grade spot drill designed for positional centring and chamfering on NC machines and drilling rigs.

• HSS‑Co for heat and wear resistance
• Cylindrical shank to DIN 1835‑A
• 120° tip for precise centring
• Right‑hand cutting for standard setups

Increase machining uptime with precise two‑step operations

The cobalt‑alloyed HSS‑Co construction offers improved heat resistance and edge stability compared with plain high‑speed steel, which means longer tool life under intermittent spot‑drilling. The 120° tip combines centring and initial chamfering so that positional holes and tapped hole countersinks are created in a single pass, reducing setup changes and cycle time. For manufacturers focused on efficient production, this translates into fewer tool changes and consistent hole geometry on repeated runs.

Reliable clamping and repeatable alignment for NC plants

Equipped with a cylindrical shank to DIN 1835‑A and a tolerance h8, the tool provides secure, concentric clamping in standard toolholders. The right‑hand cutting geometry is optimised for conventional spindle rotation on numerically controlled machines, ensuring predictable chip flow and minimal axial runout. These design choices support repeatable centre location and reduce the need for secondary alignment operations on milling centres and drilling rigs.

Material guidance and practical application notes

Cobalt‑alloyed high‑speed steel is particularly suited to demanding spot‑drilling where higher temperatures and intermittent contact occur. The tool is intended for positional spot‑drilling and simultaneous chamfering of tapped holes, making it suitable for preparatory work before thread tapping. The specification includes a recommended feed of 0.03 mm/rev in steel up to 800 N, which balances cutting pressure and tool life; practitioners with less metrology experience can view this as a starting point for process tuning rather than a fixed setting.

Consistent production quality with a compact tool solution

By combining centring and chamfering into one operation, the drill helps to lower non‑productive time and reduce potential misalignment between separate tools. The compact geometry — 4 mm diameter with a 12 mm spiral length and 55 mm overall length — is optimised for machine access in crowded fixturing. The net effect is a small, robust component that supports steady production rates and simplifies tooling inventories when supplied as part of a broader workshop equipment strategy.

For procurement or technical clarification, contact Metav Werkzeuge — experienced precision partners delivering a broad range of metrology and workshop supplies from Emmerich; email info@metav-werkzeuge.com or call +49 2822 7131930 to discuss suitability and availability

Technical data

• Article number: 2000860084NW
• Type: NC centre drill
• Brand: TECWERK
• Standard: DIN 1835‑A

Data

• Diameter: 4 mm
• Overall length: 55 mm
• Spiral length: 12 mm
• Tip angle: 120°
• Shank tolerance: h8
• Packaging unit: 1

Special features

• Material: HSS‑Co
• Shank: cylindrical (DIN 1835‑A)
• Cutting direction: right‑hand cutting
• Application: positional spot‑drilling on NC machines and drilling rigs
• Function: centring and chamfering of tapped holes in one pass
• Recommended feed in steel up to 800 N: 0.03 mm/rev

FAQ

What are the primary uses for this centre drill?
The TECWERK NC centre drill (SKU 2000860084NW) is intended for positional spot‑drilling and chamfering of tapped holes on NC machines and drilling rigs, combining centring and initial chamfering in one operation.

Which materials is the tool suitable for?
The HSS‑Co alloy used in this NC centre drill offers enhanced heat and wear resistance, making it well suited to steel and general workshop materials where intermittent contact and elevated cutting temperatures occur.

How does the DIN 1835‑A shank benefit machine setup?
The cylindrical shank to DIN 1835‑A ensures compatibility with standard collets and toolholders, providing secure clamping and concentric runout for repeatable hole positions across production batches.

What feed should be used when spot‑drilling steel?
A recommended starting feed is 0.03 mm/rev in steel up to 800 N; this guideline for the TECWERK centre drill balances cutting forces and tool life and can be adjusted during process optimisation.

Can the tool perform chamfering and centring in one pass?
Yes, the 120° tip geometry of the TECWERK NC centre drill is designed to centre and create the initial chamfer for tapped holes in a single operation, reducing setup time and tool changes.

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