FANAR POGLEBIACZ DIN 335-C 90° x 10.4 mm HSS countersink

FANAR POGLEBIACZ DIN 335-C 90° x 10.4 mm HSS countersink is a high-speed steel tool designed for creating precise chamfers and deburring hole edges in metalworking. Manufactured to DIN 335‑C form, this 90° countersink with a 10.4 mm cutting diameter is suitable for both manual and machine operations. It is intended to prepare holes for fasteners, improve edge quality and provide a cleaner surface finish on steel and other metals.

Advantages

The HSS construction provides good wear resistance and heat tolerance during typical drilling and countersinking operations. The 90° angle conforms to standard fastener chamfer requirements, allowing consistent seating of screws and rivets. Its 10.4 mm diameter offers a balance between compact size and effective chip removal, while the DIN 335‑C form ensures predictable cutting geometry and compatibility with common toolholders.

Suitable for

• Deburring drilled holes in steel and non-ferrous metals
• Creating 90° chamfers for countersunk fasteners
• Preparation of mating surfaces prior to assembly
• Use in hand drills, drill presses and light milling machines

Key specifications

• Cutting angle: 90°
• Cutting diameter: 10.4 mm
• Material: High-speed steel (HSS)
• Tool form: DIN 335‑C
• Application: Countersinking and deburring in metalworking

How to use

Secure the workpiece to prevent movement and select an appropriate speed for the material being processed. Align the countersink with the hole axis and apply steady, moderate feed to produce the chamfer; avoid excessive pressure to reduce tool wear and minimize chatter. For machine use, ensure the toolholder is rigid and the spindle speed matches recommendations for HSS tools and the workpiece material. Clear chips frequently and inspect the hole edge for a consistent chamfer depth.

Usage recommendations

Use cutting fluid when countersinking steel to improve surface finish and extend tool life. Replace the countersink if chipping or significant wear appears on the cutting edges. For repetitive production work, verify runout and tool clamping to maintain consistent chamfer dimensions.