Tools > Drilling > Jobber Drill Bits & Sets > Jobber Drill Bits | Sutton Tools Jobber Drill Bits - Blue Bullet | Descriptions | Sutton Tools Blue Bullet jobber drills are a general purpose drill bit designed for machine and hand held drilling ferrous metals | The blue finish reduces chip build up on the cutting edge and is a better choice when drilling ferrous materials | Dimensions | d1 (mm): 12.2 | l1 (mm): 151 | l2 (mm): 101 | Pack Quantity: 1 | Features | 118 standard point for general purpose applications | 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: 5XD | Shank Form: A | Helix Angle: R30 | X: als | Point Tolerance: h8 | Point Angle: 118 | Point Form: Form A | Cutting Edges: ul | Standard: ANSI B94-11/DIN 338 | 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)- 250 HB | 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 Steel - High alloy, cast & tool- 200 HB