8mm Machine Tap DIN 371C M8x1.25 HSS Form C Right-Hand 6H For Blind Holes - Ruko GmbH

Take advantage of a high‑performance HSS construction combined with a 35° right‑hand spiral and ISO2 (6H) tolerance for reliable metric blind threads; order the Machine tap directly via Metav Werkzeuge or consult our specialists for application advice.

Machine tap DIN 371C M8×1.25 HSS 6H – RUKO

The Machine tap DIN 371C M8×1.25 HSS 6H is a machine tap for producing metric ISO blind threads in unalloyed and low‑alloy steels, malleable cast iron and non‑ferrous metals

• HSS Form C for industrial durability
• 35° right‑hand spiral for efficient chip evacuation
• ISO metric thread M8×1.25, tolerance 6H
• Suitable for blind holes in steels up to 800 N/mm²

Consistent, production‑grade thread quality for demanding workshops

This machine tap delivers repeatable thread accuracy in serial production due to the DIN 371C geometry and ISO2 (6H) tolerance. The metric ISO thread M8×1.25 specification and adherence to DIN 13 sheet 1 ensure interchangeability and fit with standard bolts and components. Using a high‑speed steel (HSS) tool with Form C geometry reduces wear under continuous use, supporting predictable process outcomes and fewer rework cycles. For procurement planning, this means a stable part quality horizon and improved machine uptime.

Improved chip control and longer tool life through spiral design

The 35° right‑hand spiral flute geometry promotes active chip evacuation from blind holes, reducing the risk of chip packing that can damage threads. Combined with flank honing, the design smooths cutting edges to cut more cleanly and resist chipping. These features translate into practical shop benefits: fewer tap breakages, reduced machine stops, and a longer service life per tool. The shank Ø 8 mm provides secure clamping in standard tool holders, contributing to consistent concentricity and surface finish.

Broad material compatibility and clear application range

Engineered for use in unalloyed and low‑alloy steels up to 800 N/mm², malleable cast iron and a range of non‑ferrous metals, the tap suits mixed‑material production cells where changeovers are frequent. The tool is specified for blind hole applications, so process parameters should account for adequate chip evacuation and cutting fluid where necessary. The combination of geometry and materials offers an efficient balance between cutting performance and toughness, making the tap a pragmatic choice for general machining of metric components.

Practical handling and integration into workflows

The tap’s standardised dimensions and DIN 371C profile simplify tool selection and replacement in existing tool cabinets. As a machine tap with right‑hand cutting, it integrates seamlessly into automated tapping cycles and CNC routines designed for metric ISO threads. The tool’s construction allows predictable feed and speed recommendations consistent with HSS practice, supporting straightforward programming and reduced setup time. Maintenance is limited to inspection and regrinding when wear becomes apparent, helping to keep lifecycle costs under control.

For reliable metric blind threads and expert guidance on integrating this RUKO machine tap into production, contact Metav Werkzeuge — email info@metav-werkzeuge.com or call +49 2822 7131930 to discuss suitability and delivery options.

Technical data

• Article number: 4000601964NW
• Designation: Machine tap DIN 371C M8×1.25 HSS 6H RUKO
• Manufacturer: Ruko GmbH

Core specifications

• Thread: M8×1.25
• Tolerance field: ISO2 (6H)
• Shank diameter: 8 mm
• Spiral angle: 35°
• Intended hole type: blind hole

Materials & features

• Material: HSS
• Form: C, right‑hand spiral
• Flank relief: flanks honed
• Suitable for: unalloyed and low‑alloy steels up to 800 N/mm²; malleable cast iron; non‑ferrous metals
• Standard: DIN 13 sheet 1; metric ISO thread

FAQ

What materials can this machine tap handle? This Machine tap DIN 371C M8×1.25 HSS 6H from RUKO is suitable for unalloyed and low‑alloy steels up to 800 N/mm², malleable cast iron and a range of non‑ferrous metals

Is the tap suitable for blind hole applications? Yes, the tap is designed specifically for blind holes; the 35° right‑hand spiral and flank honing support chip evacuation in closed‑end holes

What tolerance and thread standard does the tool follow? Threads are produced to metric ISO specifications with a tolerance field of ISO2 (6H) in accordance with DIN 13 sheet 1

What is the shank diameter and how is it held? Shank Ø is 8 mm; the tap is intended for secure clamping in standard tool holders and machine tap spindles

Can this tap be used in automated tapping cycles? The right‑hand cutting and standardised DIN 371C geometry make the tap suitable for integration into CNC and automated tapping programmes

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