DRILL COBALT HSS

The Sutton Tools® D108-Series Cobalt HSS Jobber Drill Bit is engineered for industrial-grade performance in the toughest materials. With a 5% cobalt high-speed steel composition, this heavy-duty bit delivers exceptional durability, heat resistance, and cutting strength—ideal for drilling cast iron, bronze, hardened steel, stainless steel, and other high-tensile metals.

A thick core provides added rigidity for stable drilling in hard metals, while the 135° split point ensures accurate positioning, reduced wandering, and lower drilling pressure. Finished with a colour-tempered surface, the bit is easy to identify as a cobalt-grade tool built for demanding applications.

Features:

• 135° split point for precise starts and reduced drilling pressure

• Thick core for increased rigidity in hard materials

• Precision parallel shank ensures consistent, accurate hole sizing

• HSS-Co (5% cobalt) provides superior heat, abrasion, and wear resistance

• Colour-tempered finish indicates cobalt tool construction

• Ideal for stainless steel, hardened steel, cast iron, and other high-strength metals

Specifications:

• Diameter: 3.5 mm

• Point Angle: 135°

• Helix Angle: R30

• Point Tolerance: h8

• Point Form: Form C

• Material: HSS-Cobalt

• Finish: Colour Tempered