RUKO SPB-DIN338 9.9mm HSS-Co Twist Drill Bit

Precision-ground HSS-Co twist drill bit with 5% cobalt for high-alloy steels and stainless steel, DIN 338, 9.9 mm diameter, 133 mm total length, 87 mm flute length, split point 135° for accurate centring.

Overview

The RUKO SPB-DIN338-9,9mm-HSSCo is a professional twist drill bit manufactured to DIN 338 standards. Made from high-speed steel with 5% cobalt (HSS-Co), it offers enhanced heat resistance and durability for demanding drilling tasks. The bright ground finish and split point geometry ensure precise starts and clean holes.

What stands out

• 5% cobalt alloy for high heat resistance and long tool life
• Split point 135° reduces walking and improves centring
• Ground from solid for consistent quality and sharpness
• Type N flute profile for efficient chip evacuation in tough materials
• h8 shank tolerance for secure chuck grip

Technical details

• Drill bit type: Twist drill bit
• Standard: DIN 338
• Material: HSS-Co (5% cobalt)
• Diameter: 9.9 mm
• Total length: 133 mm
• Working length: 87 mm
• Shank type: Cylindrical
• Point angle: 135°
• Point grind: Split point
• Surface finish: Bright / Ground
• Flute type: Type N
• Cutting direction: Right-hand
• Tolerance: h8
• Max tensile strength: 1100 N/mm²
• Packaging quantity: 1

Our verdict

A reliable cobalt drill bit for stainless and high-alloy steels, combining DIN 338 geometry with a split point for accurate drilling. Ideal for workshops and demanding applications.