Descriptions

• Sutton Tools Blue Bullet stub drills are a rigid twist drill for use in automatic lathes & hand drilling machines
• Developed to drill holes for rivets in flat and curved panels and used in sheet metal fabrication
• The blue finish reduces chip build up on the cutting edge and is a better choice when drilling ferrous materials
• Flute Length designed for shallow hole drilling no deeper than 3 x diameter

Features

• 118° split point minimizes wandering when starting
• Precision engineered parallel shank for accurate hole size
• Made from M2 High Speed Steel (HSS) offering the best combination of strength, heat & wear resistance
• Blue surface finish for ferrous applications. The steam oxide finish prevents chip build-up on the cutting edges and reduces cutting friction, especially in low carbon steels

Specifications

• Designation: N
• Material: High Speed Steel
• Finish: Blue
• Maximum Cut Depth: 3XD
• Shank Form: A
• Helix Angle: R30
• X: als
• Point Tolerance: h8
• Point Angle: 135°
• Point Form: Standard
• Cutting Edges: ul

Applications

• Optimal for Steel - Non-alloy, cast & free cutting (~ 0.15 %C)- 125 HB
• Optimal for Steel - Non-alloy, cast & free cutting (~ 0.45 %C)- 190 HB
• Optimal for Steel - Non-alloy, cast & free cutting (~ 0.45 %C)- 250HB
• Optimal for Steel - Non-alloy, cast & free cutting (~ 0.75 %C)- 270 HB
• Optimal for Steel - Low alloy & cast < 5% of alloying elements- 180 HB
• Optimal for Steel - Low alloy & cast < 5% of alloying elements- 275 HB
• Optimal for Cast Iron, Grey (GG) – 180 HB
• Optimal for Cast Iron, Nodular (GGG) – 160 HB