M8x1.25mm Machine Tap HSS-Co5 Form B Straight Flute ISO Metric 6H Through Hole - Ruko GmbH

Take advantage of the combination of HSS‑Co5 wear resistance, the Form B straight‑flute geometry and robust suitability for steels up to 1000 N/mm² to secure consistent thread quality in serial production. Order the tap directly via Metav Werkzeuge or contact the consultants for application advice.

Machine tap DIN 371B M8 x 1.25 mm HSS‑Co5 6H RUKO — Form B, straight flute

The Machine tap DIN 371B M8 x 1.25 mm HSS‑Co5 6H RUKO is a metric through‑thread tap in Form B, designed for machining unalloyed and alloyed steels, malleable cast iron and non‑ferrous metals in industrial workshop environments.

• HSS‑Co5 for increased wear resistance
• Form B straight flute design
• DIN 13 metric ISO thread, tolerance 6H
• For steels up to 1000 N/mm²

Consistent threads through material‑matched hardness

The use of HSS‑Co5 (high‑speed steel with 5 % cobalt) provides enhanced heat resistance and abrasion performance, which keeps cutting edges sharper for longer in demanding production runs. When paired with the Form B straight‑flute geometry, the tool delivers stable chip formation for through threads; the result is repeatable thread quality and fewer rejected parts. For purchasers assessing lifecycle costs, this translates into reduced rework and steady throughput.

Predictable tolerance and ISO compliance for assembly

Designed to the DIN 13 standard and ground to tolerance 6H, this machining tool ensures threaded holes meet established assembly specifications without additional finishing. The ISO tolerance class means fasteners from standard suppliers will fit reliably, reducing inspection time and inventory complexity. The included peeling cut chamfer assists in lead‑in for through holes, simplifying alignment during automated or manual tapping operations.

Geometry and handling that support efficiency

The straight‑flute profile and flank relief reduce cutting forces and enable controlled chip evacuation in many materials, particularly in non‑ferrous metals and temper cast iron. The tool’s shaft Ø 8 mm allows secure clamping in standard tap holders and machine spindles; right‑hand cutting follows conventional spindle rotation for immediate integration into existing lines. These features aid quick tool changes and maintain cycle consistency in mixed‑batch work.

Suitable applications and material guidance

This threading tool is suited to industrial workshops and production cells that require a robust metric tap for medium‑hard steels and common non‑ferrous alloys. It is intended for through‑hole threading in components made from unalloyed or alloyed steel up to 1000 N/mm², as well as temper cast iron and many NE‑metals. For less experienced technicians, the terms are: HSS‑Co5 means higher thermal tolerance; Form B signifies straight flutes good for through holes; 6H specifies a standard internal thread tolerance compatible with standard bolts.

Choose genuine RUKO taps via Metav Werkzeuge to ensure repeatable thread accuracy in production; contact Metav Werkzeuge at info@metav-werkzeuge.com or +49 2822 7131930 for tailored advice and fast supply.

Technical data

• Article number: 4000601925NW
• Label: Maschinengewindebohrer DIN 371B M8x1,25mm HSS‑Co5 6H RUKO
• Manufacturer: Ruko GmbH
• Packaging unit: 1

Facts

• Thread: M8 x 1.25 mm
• Material grade: HSS‑Co5
• Shaft diameter: 8 mm
• Tolerance field: 6H
• Cutting direction: right‑hand

Special features

• Form B, straight flute, flank relief
• DIN 13 sheet 1 metric ISO thread
• Peeling cut for through‑hole threads
• Suitable for steels up to 1000 N/mm², temper cast iron, non‑ferrous metals

FAQ

What materials can be machined with this tap?
The RUKO machine tap is suitable for unalloyed and alloyed steels up to 1000 N/mm², temper cast iron and common non‑ferrous metals; these material categories are specified for this threading tool.

Is the thread tolerance suitable for standard fasteners?
Yes, the tap is produced to DIN 13 with tolerance field 6H, providing compatibility with standard metric fasteners and reducing the need for special bolts.

What is the shank diameter for clamping?
The tool has a shank diameter of 8 mm, allowing secure mounting in standard tap holders and chucks.

Does the tap have a chamfer for through holes?
This tap features a peeling cut chamfer designed specifically to ease lead‑in for through‑threading operations.

Can the tool be used in automated tapping units?
The straight‑flute geometry and right‑hand cutting suit both manual and automated tapping systems; the robust HSS‑Co5 grade supports repeated cycles in production.

Ruko GmbH: Manufacturer/Responsible: Ruko GmbH Präzisionswerkzeuge, Robert‑Bosch‑Strasse 7, 71088 Holzgerlingen