Narex 65405604

Narex 65405604 Cobalt HSS-Co Metal Drill Set, 5 pcs (3-8 mm)

The Narex 65405604 high-performance cobalt drill set is identical in specification to the 65405601: 5% cobalt HSS-Co bits in diameters 3, 4, 5, 6, and 8 mm. These drills excel in demanding operations on common and alloyed steels, providing excellent heat conduction and resistance to high loads. Perfect for workshops tackling stainless steel, cast iron, and high-tensile alloys.

Features

• 5% cobalt content (HSS-Co): Maintains hardness at high temperatures.
• Set contents: Ø3, 4, 5, 6, 8 mm.
• Cross-ground split point: No walking, less thrust needed.
• Cylindrical shank: Universal compatibility.
• Ground flutes: Smooth chip ejection.

Benefits

• Drills stainless steel and Inconel effectively.
• Longer life than standard HSS in automated cycles.
• Reduces burning and work hardening of the hole.
• Cost-effective cobalt set for essential sizes.

Set Contents

• Ø3 mm – pilot for M4 taps in hard steel
• Ø4 mm – M4 clearance in stainless
• Ø5 mm – rivet holes in armor plate
• Ø6 mm – M6 clearance in alloy steel
• Ø8 mm – anchor holes in cast iron

Material & Compatibility

• Material: HSS-Co with 5% cobalt (equivalent to M35).
• Compatible materials: Stainless steel (304, 316, 410), alloy steel, cast iron, titanium, nickel alloys.
• Speed recommendation: Use 50% of HSS speed with coolant.
• Chuck type: Cylindrical shank (0.5-13 mm chuck).

Care Instructions

• Use heavy cutting oil or cobalt-specific lubricant.
• Maintain constant feed; do not let bit rub.
• Inspect cutting edges after each use in hard materials.
• Store separately from standard HSS bits to avoid confusion.

Narex Cobalt HSS-Co – Applications

• Stainless steel fabrication: Handrails, kitchen counters, tanks.
• Automotive exhaust: Drilling stainless pipes.
• Maintenance: Removing broken bolts from cast iron.
• Toolroom: Pilot holes in pre-hardened steel.

Keywords

Narex 65405604, HSS-Co cobalt drill set, 5% cobalt bits, stainless steel drill bits, metal drill set 3-8mm, Narex 65405604, high-temperature drilling.