Cutting Counterbore FANAR POGLEBIACZ DIN 335-C 90° 8.3 mm HSSE TiN

The FANAR POGLEBIACZ DIN 335-C 90° 8.3 mm HSSE TiN is a 90-degree counterbore designed to produce flat-bottomed recesses and precise seating for screw heads and bolts. Manufactured with HSSE (high-speed steel with cobalt) and finished with a titanium nitride (TiN) coating, the tool follows DIN 335-C geometry for consistent counterbore angles and dimensions. It is intended for use in metalworking and machining operations where accurate countersinks and recesses are required.

Advantages

The HSSE substrate provides enhanced toughness and wear resistance compared with standard high-speed steel, while the TiN coating reduces friction and increases tool life under typical machining conditions. DIN 335-C geometry ensures standardized 90° seating and repeatable results, and the 8.3 mm diameter offers compatibility with a range of fastener sizes and mounting setups. The tool’s construction supports stable cutting performance when used in appropriate holders and machines.

Suitable for

• Creating flat-bottomed recesses for countersunk screws and bolts in metal components
• Machining operations on steels and similar alloys where DIN 335-C counterbores are specified
• Use in production and maintenance settings requiring repeatable 90° countersinks

Key specifications

• Counterbore angle: 90° (DIN 335-C geometry)
• Diameter: 8.3 mm
• Material: HSSE (high-speed steel with cobalt)
• Coating: TiN (titanium nitride)
• Intended application: flat-bottomed recesses and countersinks for screw heads and bolts

How to use

Select an appropriate holder or arbor compatible with the counterbore shank and secure the tool according to the machine manufacturer’s instructions. Position the workpiece and align the tool with the intended fastener location. Use cutting parameters suitable for HSSE with TiN coating and the workpiece material—typically moderate speeds and feeds for steels—employing adequate lubrication or coolant as recommended for the material being machined. Advance the counterbore to the required depth to form a flat-bottomed recess and retract the tool carefully to avoid burring.

Usage recommendations

For best results, match spindle speed and feed to the workpiece material, maintain stable clamping, and use cutting fluid when machining steels to extend tool life and improve surface finish. Inspect the 90° seating dimension after machining to verify compliance with assembly requirements.