FANAR Drill Bit POGLEBIACZ DIN 335-C 90° x 20.5 mm HSS

FANAR POGLEBIACZ DIN 335-C 90° x 20.5 mm HSS is a countersink tool made from high-speed steel (HSS) and manufactured to DIN 335-C dimensions. The tool features a 90° cutting angle and a 20.5 mm diameter, intended for producing chamfers, countersinks and for enlarging or deburring holes in metalworking and general machining operations. It is compatible with hand-held drills, drill presses and machine tools when precise edge finishing and reliable fastener seating are required.

Advantages

The HSS material provides good wear resistance and heat tolerance for standard machining conditions. The DIN 335-C geometry ensures consistent cutting angles and reliable centring, while the 90° point is suited for most countersinking tasks related to flat-head fasteners. The 20.5 mm diameter offers a balance between clearance size and rigidity, allowing controlled material removal without excessive vibration when used at appropriate speeds.

Suitable for

• Creating countersinks for flat-head screws in metal components
• Deburring and chamfering drilled holes
• Enlarging existing holes to a defined diameter
• Use in drill presses, machining centres and portable drills

Key specifications

• Material: High-speed steel (HSS)
• Standard: DIN 335-C geometry
• Cutting angle: 90°
• Nominal diameter: 20.5 mm
• Application: Countersinking, chamfering, hole enlargement and deburring in metalworking

How to use

Select an appropriate mounting method for your equipment (chuck or arbor) and ensure the tool is securely clamped. Set spindle speed according to the workpiece material and tool diameter—moderate speeds are recommended for HSS cutters in ferrous metals. Align the countersink with the hole axis and apply steady feed pressure; allow the tool to do the cutting rather than forcing heavy feeds. Clear chips periodically and use cutting fluid as needed for improved surface finish and tool life. After use, inspect the cutting edges for wear or damage.

Usage recommendations

For best results, use cutting fluid when countersinking steels and other hard metals, keep spindle speeds moderate to avoid overheating, and ensure the workpiece is firmly clamped to minimise runout and vibration. Replace the tool when edge wear affects finish quality or increases torque.