6.3-20.5mm Countersink Set DIN 335C 90° 3-Flute Solid Carbide In Plastic Case - Ruko GmbH

Take advantage of a compact, workshop-ready countersink solution that combines solid carbide durability with a standardised DIN 335 C geometry and a 90° cutting angle for reliable chamfering; order the set via Metav Werkzeuge or consult our specialists for specification advice.

RUKO Countersink Set DIN 335 C — solid carbide, 90° angle

The RUKO Countersink Set DIN 335 C is a six-piece solid carbide countersink kit designed for precision chamfering and deburring tasks across common screw and bolt sizes

• Countersinks to DIN 335 C standard
• 90° countersink angle for universal use
• Solid carbide for extended tool life
• Impact-resistant plastic cassette included

Precision materials and geometry for consistent results

The set is manufactured from solid carbide, delivering high hardness and excellent wear resistance that translates to longer tool life under demanding workshop conditions. The cutters conform to DIN 335 C, a recognised standard for conical countersinks, which ensures predictable chamfer geometry and interchangeability across tooling systems. The 3 flutes provide a good balance between cutting stability and chip control, producing clean chamfers with reduced tendency to chatter. These technical attributes support steady processing and lower tool-change frequency, benefiting production continuity.

Broad size coverage for everyday machining tasks

With a diameter range of 6.3–20.5 mm, the kit covers the most common countersinking requirements for screw seats and deburring operations, reducing the need for multiple single tools. The uniform 90° countersink angle suits a wide range of fastener head geometries, enabling accurate seating and improved joint appearance. Where exact seating depth is required, the standardised cone angle simplifies setup calculations and repeatability across batches, helping maintain assembly quality and minimising rework.

Organised storage and robust protection for the shop floor

The six cutters are supplied in an impact-resistant plastic cassette, engineered to protect cutting edges and to keep the set organised on the bench or in a tool cabinet. The cassette reduces handling damage and makes transport between machines straightforward, while the compact format supports efficient tool management. Clear, secure storage aids rapid selection of the correct diameter and helps preserve the integrity of the solid carbide cutting edges, which is essential for consistent surface finish and dimensional accuracy.

Practical machining guidance and operational benefits

A three-flute configuration improves cutting balance and chip evacuation compared with two-flute designs, often resulting in smoother surfaces and lower vibration at moderate feeds. Carbide construction withstands elevated cutting temperatures, which supports higher productivity where suitable machining parameters are selected. For best results, use appropriate coolant or air blast to clear chips and preserve edge life; the standardised geometry of the set simplifies tool path planning and reduces setup time in both single-part and batch production environments.

For reliable chamfering backed by Metav Werkzeuge’s supply chain and workshop expertise, contact Metav Werkzeuge in Emmerich by e‑mail at info@metav-werkzeuge.com or by phone on +49 2822 7131930 to discuss the RUKO countersink set (SKU 4000601502NW) and secure prompt delivery

Technical data

• Article number: 4000601502NW
• Standard: DIN 335 C
• Material: solid carbide (HM)
• Packaging: impact- and break-resistant plastic cassette

Facts

• Number of pieces: 6
• Diameter range: 6.3–20.5 mm
• Countersink angle: 90°
• Flutes: 3
• Packaging unit: 1

Special features

• 3 cutting edges
• Conforms to DIN 335 C
• Impact- and break-resistant plastic cassette
• Compact workshop storage format

FAQ

What sizes are included in the set?
The set covers a diameter range of 6.3–20.5 mm as specified for the RUKO countersink set (SKU 4000601502NW), providing coverage for common screw and bolt countersinking needs.

Is the material suitable for continuous workshop use?
Yes, the solid carbide construction provides high wear resistance suitable for continuous use, offering extended tool life under normal workshop operating conditions.

What advantage does a 3-flute design provide?
A 3-flute geometry offers improved cutting balance and efficient chip evacuation, which contributes to smoother chamfers and reduced vibration compared with some alternative flute counts.

How does the DIN 335 C standard affect use?
DIN 335 C standardisation ensures consistent cone geometry and interchangeability, simplifying setup and delivering repeatable chamfer angles across production runs.

How is the set supplied for storage and transport?
The cutters are supplied in an impact-resistant plastic cassette, designed to protect the cutting edges and to keep the components organised and ready for immediate use.

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