8.3mm Countersink HSS Special Coated 3-Flute 90° EUC, Precision Radial Relief - MAPAL Dr. Kress SE & Co. KG

Take advantage of a precision HSS countersink with EUC geometry that significantly reduces cutting forces and improves stability in production; order directly via Metav Werkzeuge or consult the team for application advice.

EUC Countersink DIN 335 C 90° Ø8.3 mm – HSS special, 3‑flute (MAPAL)

The EUC Countersink DIN 335 C 90° Ø8.3 mm is a precision 3‑flute countersink with a cylindrical shank, designed for reliable chamfering and deburring of steel, cast iron and non‑ferrous metals in industrial workshop settings

• HSS special coating
• EUC geometry reduces axial force 50%
• 90° precision countersink, 3 flutes
• Cylindrical shank for standard holders

Lower cutting forces for faster, more stable production

The tool’s EUC geometry and extreme unequal flute division are engineered to reduce cutting loads: axial force reduced by 50% and radial force reduced by 25%. This translates into noticeably lower feed requirements and fewer torque peaks during countersinking, which helps sustain spindle life and reduces the risk of chatter. With a recommended feed in steel up to 500 N: 0.1 mm/rev, the design supports consistent chip evacuation and a predictable process window, enabling faster cycle times without sacrificing control.

Better surface quality and longer tool life through precision design

A HSS special coating combined with prepared cutting edges and radial relief provides a fine surface finish and improved resistance to edge wear. The precision execution of the cutting faces and the three‑flute geometry ensure evenly distributed cutting forces and uniform chamfering. Fewer reworks and less time spent on manual finishing are direct benefits, while the prepared edges maintain sharpness for a longer service interval, supporting predictable tool-change scheduling and lower overall operating costs.

Seamless integration in workshop tooling systems

Built to DIN 335 C with a 90° countersink angle and a cylindrical shank, this countersink fits standard holders and fixture setups. The 3 flutes and right‑hand cutting direction make it suitable for a range of materials — steel, cast iron and non‑ferrous metals — and for common production tasks such as chamfering, deburring and lead‑in preparation. The combination of standard conformity and specialised geometry makes the tool easy to specify for CNC programs or manual departments, supporting efficient setup and process reproducibility.

Contact Metav Werkzeuge for supply and application guidance: our experts at Metav Werkzeuge can advise on integrating MAPAL countersinks into current workflows and on selecting compatible holders or feeds

Technical data

• Article number: 4000806033NW
• Label: Kegelsenker EUC DIN 335C 90Grad D.8,3mm HSS spezial Zyl.schaft Z.3 BECK
• Manufacturer: MAPAL Dr. Kress SE & Co. KG
• Packaging unit: 1

Core specifications

• Diameter: 8.3 mm
• Countersink angle: 90°
• Flutes: 3
• Shank: cylindrical
• Standard: DIN 335 C
• Recommended feed in steel (up to 500 N): 0.1 mm/rev

Materials & special features

• Material: HSS
• Coating: special coating
• Geometry: EUC (extreme unequal division)
• Cutting direction: right‑hand cutting
• Design: precision execution, radial relief
• Applications: steel, cast iron, non‑ferrous metals
• Performance benefits: axial force reduced by 50%, radial force reduced by 25%
• Additional: optimised countersinking via prepared cutting edges

FAQ

What materials is this countersink suitable for? This EUC Countersink DIN 335 C 90° Ø8.3 mm is suitable for steel, cast iron and non‑ferrous metals as indicated by the tool’s design and HSS construction.

How does the EUC geometry benefit production? The EUC geometry in this MAPAL countersink evens out cutting loads and reduces axial and radial forces, which improves stability and lowers the risk of chatter during chamfering operations.

Which shank and standard does the tool use? The tool is supplied with a cylindrical shank and conforms to DIN 335 C, making it compatible with standard toolholders and fixtures.

What feed values are recommended for steel? For steel, a guide value is 0.1 mm/rev at an axial load up to 500 N, as noted for stable chip formation and consistent surface quality.

How many flutes does the countersink have and why does that matter? The countersink has 3 flutes, which balance chip evacuation and cutting stability, contributing to a uniform chamfer and reduced vibration during machining.

Manufacturer/Responsible: MAPAL Dr. Kress SE & Co. KG, Ob. Bahnstrasse 13, 73431 Aalen