Cobalt Drill Bit Set for Stainless Steel and Hard Metal

Specifications:

Material: HSS with 5% COBALT

Angle Point: 135 Degree

Flute Type: Spiral

T Shank Type: Straight Shank

Main Description:

The drill bit is made of M35 grade cobalt steel with 5% cobalt content, increasing its strength, tool life, and heat resistance. The Rockwell Hardness is equal to or greater than 67, ensuring durability and wear-resistance.

The self-centering split point design allows for drilling directly to the desired size without any pre-drilling, while the fully ground spiral groove clears particles quickly, reducing friction and heat for faster and cooler drilling performance.

The 135-degree angle point requires less force to remove metal compared to lower angles like 90° and 118°, making it more efficient when cutting through hard metals such as stainless steel, cast iron, and high-temperature alloys.

Manufactured from M35 grade cobalt steel, these drill bits have a Rockwell hardness of up to 67, providing fast and sharp cutting performance that is up to 12 times better than average HSS drill bits. They are particularly effective for cutting through hardened materials like stainless steel and cast iron, but can also be used on softer materials like wood and aluminum alloy.

The self-centering design increases cutting speed and prevents walking, while the precision ground construction ensures accurate cutting diameter and prolongs the lifespan of the bits. The smooth surface allows for clean drilling with ease.

Each package includes 10 cobalt twist drill bits with a 5mm diameter, stored in a plastic box for convenience. The total length of each bit is 3.4 inches, with a working length of 2 inches, making them suitable for a variety of drilling tasks.

product information: