Drill bit FANAR WIERTLO NWKA Ø10.40 mm HSSE for stainless steel DIN 338, length 87/133 mm

Solid drill bit FANAR WIERTLO NWKA Ø10.40 mm HSSE for stainless steel DIN 338, length 87/133 mm is a twist drill designed for machining stainless steels and other hard metals. Manufactured in HSSE grade and conforming to DIN 338 geometry, it provides the cutting geometry and core strength expected for general-purpose and professional use. The nominal diameter is 10.40 mm and the drill's functional and overall lengths are 87 mm and 133 mm respectively, making it suitable for through-holes and moderate-depth drilling operations in metalworking environments.

Advantages

This FANAR WIERTLO NWKA drill bit combines HSSE material properties with DIN 338 geometry to offer good wear resistance and thermal stability when drilling stainless steel. The solid construction ensures rigidity and accurate concentricity, while the optimized helix and point geometry reduce cutting forces and help evacuate chips from the hole. The specified length proportions (functional 87 mm, overall 133 mm) balance reach and stiffness for typical machining and maintenance tasks.

Suitable for

• Drilling stainless steel (INOX) and other corrosion-resistant alloys
• General metalworking and fabrication tasks
• Professional machining, maintenance and repair work
• Through-holes and medium-depth holes in structural components

Key specifications

• Diameter: 10.40 mm
• Material grade: HSSE (High Speed Steel with Cobalt)
• Geometry standard: DIN 338 twist drill profile
• Functional length: 87 mm
• Overall length: 133 mm
• Application: designed for stainless steel and hard metals

How to use

Secure the drill bit in a compatible tool holder or chuck with sufficient clamping length and runout control. Use appropriate cutting speeds and feeds for stainless steel to avoid work hardening: moderate cutting speed, steady feed rate, and sufficient coolant or cutting fluid are recommended. Start with a center punch or pilot hole when high positional accuracy is required. Apply steady pressure, withdraw periodically to clear chips, and maintain coolant flow to reduce heat buildup and extend tool life.

Usage recommendations

For best results when drilling stainless steel, use cutting fluid and a lower cutting speed compared with carbon steels, ensure tool runout is minimized, and replace or regrind the drill when wear or chipping appears to maintain hole quality and dimensional accuracy.