kwb 525090 kartio-upotusporasarja, 3-osainen, HSS-G, 90°, DIN 335 C

Deburring and countersinking screw holes by hand can leave rough edges and inconsistent chamfers. This 3-piece countersink set from kwb solves that with precision-ground HSS-G bits that create clean, uniform 90° countersinks in a wide range of materials.

Who is it for

Ideal for metalworkers, woodworkers, and DIYers who need reliable countersinking for M3, M4, and M5 screws. The set works with both drill presses and hand drills.

Main features

• Three countersink diameters: 6.3 mm, 8.3 mm, and 10.4 mm for M3, M4, and M5 screws.
• Made from high-speed steel (HSS-G) with a ground finish for sharp, long-lasting cutting edges.
• 90° countersink angle conforms to DIN 335 C for standard screw head seating.
• Cylindrical shank fits standard drill chucks.
• Suitable for steel, cast iron, non-ferrous metals, light metals, plastics, and wood.
• Supplied in a blister pack for storage and organization.

Specifications

• Product type: Countersink set
• Number of pieces: 3
• Material: High Speed Steel (HSS-G)
• Countersink angle: 90°
• Shank type: Cylindrical
• Countersink diameters: 6.3 mm, 8.3 mm, 10.4 mm
• Recommended screw sizes: M3, M4, M5
• Standard: DIN 335 C
• Surface finish: Ground
• Coating: Uncoated
• Packaging: Blister pack

Tips

Use a low speed and steady pressure when countersinking in metal to avoid overheating the bit. For plastics and wood, higher speeds can be used. Always secure the workpiece before drilling.