Bordo Metric - HSS Cobalt Jobber Drill Set in ABS Case With Bonus Engineer's Quick Reference Pocket Book

• Bordo Metric Cobalt Tough HSS-Co5 Jobber Drills DIN338.

All About 135° Split Point (crankshaft point)

• The split point is self-centering and the short distance from the drill axis to the outer corners results in faster penetration reducing the need for end thrust.
• The 135° point should be used to cut harder steel materials, especially in deep hole applications.
• In these situations, it will produce thicker chips minimizing work hardening of the cavity.
• Faster penetration reduces abrasion and friction along the cutting edges.
• Cobalt HSS jobber drills are extremely hard and provide superior performance and increased tool life especially in stainless steel and high tensile steel.

All About Drill Bit Surface Treatment

• Bronze Finish (gold oxide).
• The metallic brown colored low-temperature temper treatment is normally only used on cobalt tools for identification purposes.

Contents

Bonus

• Engineer's Quick Reference Pocket Book