Sutton Tools Heavy Duty Cobalt jobber drills are industrial quality for drilling materials that have high hardness and tensile strength such as cast iron, bronze, hardened steel & stainless steel

These drill bits feature a thick core for increased rigidity in hard materials

• Range (in): 1/16-3/8 x 64ths
• Pack Quantity: 21
• Designation: Tough Materials
• Material: High Speed Steel Cobalt
• Finish: Colour Temp
• Helix Angle: R25
• Point Angle: 135°
• Point Form: Form C
• Standard: ANSI B94-11

• Optimal for Steel - Non-alloy, cast & free cutting (~ 0.45 %C)- 250 HB
• Optimal for Steel - Non-alloy, cast & free cutting (~ 0.75 %C)- 300 HB
• Optimal for Steel - Low alloy & cast < 5% of alloying elements- 275 HB
• Optimal for Steel - Low alloy & cast < 5% of alloying elements- 300 HB
• Optimal for Copper & Copper alloys (Brass/Bronze) - Brass (CuZn, CuSnZn)- 90 HB

• 135° split point (drills > 2mm & 3/32) enables accurate positioning and less drilling pressure
• Thick core for increased rigidity in hard materials
• Precision engineered parallel shank for accurate hole size
• Made from HSS Co. The 5% cobalt formula improves abrasive & heat resistance, for increased strength at higher cutting temperatures
• Colour Tempered surface finish enables identification of cobalt tool material