Jobber Length Bits for Drilling Metals

Jobber Length Drill Bits

These high performance twist drill bits are available in three different materials and are suitable for all normal drilling in conventional materials.

Features

• The HSS ground twist drill bit is made of heavy-duty high-speed steel.
• The fully ground twist drill bit has a more precise concentricity.
• HSS-Co drills are ideally suited for materials that are especially difficult to drill such as stainless steel and for higher chip loading.
• HSS-TiN drill bit models add a titanium nitride coating, to increase the surface hardness to approximately 2300 HV and the heat resistance to 1100°F (600°C).
• The Titanium Nitride coating also provides longer tool life with increased cutting speeds.
• Point Cut: 1/8" dia. with split point DIN 1412 C
• Point angle: 118°
• Helix angle: 20° to 30°
• Right-hand cutting

Applications

Use HSS, HSS-Co and HSS-TiN coated drills for:

• Steel and stainless steel
• Alloyed and unalloyed cast iron (up to strength of 13,000 psi)
• Grey, malleable, ductile and die-cast iron
• Sintered iron, nickel silver, graphite
• Short chipping aluminum alloys
• Brass and bronze

Black & Gold Jobber Length Drill Bits

These high performance twist drills are suitable for all normal drilling in conventional materials. High Speed Steel bits with 5% Cobalt alloy (HSS-Co5) and a black oxide surface treatment on the bevel decreases cutting forces and increases wear resistance of the bit.

• Point Cut: from 1/16" dia. with split point
• DIN 1412 C
• Shank: 5/32 and larger, three-surface shank
• Point angle: 135°
• Helix angle: 40°
• Right hand cutting