FANAR POGLEBIACZ DIN 335-C 90° × 8.3 mm HSS countersink

FANAR POGLEBIACZ DIN 335-C 90° × 8.3 mm HSS countersink is a solid high-speed steel cutting tool engineered to create precise 90° chamfers and remove burrs from metal and other machinable materials. Built to DIN 335-C geometry with an 8.3 mm working diameter, this HSS countersink offers heat resistance and edge retention suitable for both hand-held and machine-mounted operations. It is intended for preparing screw seats, deburring holes and producing clean, concentric chamfers prior to assembly or finishing.

Advantages

The DIN 335-C geometry ensures consistent 90° chamfers with stable cutting performance. Manufactured from high-speed steel, the countersink maintains hardness at elevated temperatures and resists premature wear during repeated cutting cycles. Its compact 8.3 mm diameter provides good access in confined areas while delivering accurate, burr-free finishes. The solid construction allows use in drilling machines, drilling rigs, hand holders or manual countersinking operations.

Suitable for

• Deburring and chamfering drilled holes in steel, stainless steel and non-ferrous metals
• Preparing screw seats and countersinks for fasteners
• General metalworking and fitting tasks in workshops and production
• Manual deburring with hand tools and machine-mounted countersinking

Key specifications

• Tip angle: 90° (DIN 335-C geometry)
• Working diameter: 8.3 mm
• Material: High-speed steel (HSS)
• Design: Solid one-piece countersink for through-hole and spot chamfering
• Recommended use: Suitable for both manual and machine operation

How to use

Secure the workpiece and select appropriate rotational speed for the material being machined. Mount the countersink in a compatible chuck or holder and align it with the hole axis. Apply steady feed pressure and rotate the tool until the desired chamfer or burr removal is achieved, then withdraw the tool while maintaining rotation to avoid tool marks. For machine use, follow the machine manufacturer's recommended speed and feed values for HSS cutting tools and the work material.

Usage recommendations

Use cutting fluid or lubricant when working with stainless steel or other heat-sensitive materials to reduce heat buildup and extend tool life. Inspect the cutting edge regularly and regrind or replace the tool when wear affects chamfer quality. For safety, secure workpieces firmly and wear appropriate personal protective equipment when countersinking.