What It Is

The Qualtech M35 Cobalt Jobber Length Drill Bit is manufactured from premium M35 cobalt steel containing 5% cobalt for increased hardness and heat resistance over conventional M2 high speed steel.

Designed for drilling high tensile strength materials, M35 cobalt provides improved performance in demanding metal applications where standard HSS bits may lose edge retention.

Why M35 Cobalt?

M35 cobalt steel enhances red hardness - the ability of a cutting tool to maintain hardness at elevated temperatures.

Compared to M2 HSS:

• Greater heat resistance
• Improved wear resistance
• Longer edge life in tougher metals
• Allows drilling speeds up to 30% higher

This makes M35 an excellent choice for stainless steel and difficult alloys.

135° Split Point Performance

The precision 135° split point geometry starts drilling immediately on contact and reduces walking. Sizes smaller than 1/16 have the 118 degree standard point.

The flatter 135° angle is especially effective in harder metals where a standard 118° point may wander.

Applications

The Qualtech M35 cobalt drill bit is well suited for:

• Stainless steel
• Inconel
• Titanium
• Alloy steel
• Tool steel
• Cast iron
• Mild and structural steel

Jobber Length Versatility

Jobber length is the most commonly used drill bit length in industrial applications. It offers:

• Sufficient flute length for general drilling depths
• Improved rigidity compared to longer bits
• Reduced deflection
• Broad compatibility across drilling equipment

Compatible with drill presses, handheld drills, and light machining applications.

Frequently Asked Questions

What is M35 cobalt steel?

M35 is a high speed steel alloy containing approximately 5% cobalt. The added cobalt increases hardness and heat resistance compared to standard M2 high speed steel.

How is M35 different from M2?

M35 contains cobalt, which improves red hardness and wear resistance. This allows it to perform better in stainless steel and high tensile strength materials.

What is the difference between M35 and M42 cobalt?

M42 contains approximately 8% cobalt and offers higher hardness and heat resistance than M35. M35 is ideal for general tough metal drilling, while M42 is suited for heavy-duty and high-production applications.

What does “split point” mean?

A split point drill bit features a 135° tip geometry that starts drilling on contact and reduces walking compared to standard 118° drill bits.

What materials can this drill bit drill?

This bit is designed for stainless steel, Inconel, titanium, alloy steel, cast iron, and other high tensile strength materials.

Can this drill bit be used in a hand drill?

Yes. The round shank design is compatible with drill presses, handheld drills, and standard chucks.