Types of Drill Bits for Stainless Steel

Not all drill bits can handle stainless steel. At Fast Fixings Online, we recommend two proven options:

•  HSS Cobalt Jobber Drill Bits
  • Made from high-quality M35 grade steel with 5% cobalt.
  • Excellent heat resistance and hardness.
  • 135° split point for fast starts and less walking.
  • Ideal for repeated drilling in stainless steel and tough alloys.

• TCT Multi-Purpose Drill Bits
  • Diamond-ground carbide tip with a 135° point angle.
  • Designed for steel, wood, masonry, PVCu, ceramics, and concrete.
  • High-temperature copper brazed construction.
  • Ground flute for efficient chip removal.
  • Rotary mode only.

These bits are built to last and deliver clean results, even in tough materials.

Key Features to Look For

Choosing the right drill bits for stainless steel involves more than just material. Look for a 135° point angle for easier penetration and reduced walking, and flutes designed to clear chips effectively. A quality shank design helps prevent slipping in the drill chuck, giving you better control. Features like diamond-ground tips and copper brazing improve heat resistance and durability – essential when working with tough materials.

Tips for Drilling Stainless Steel

Drilling stainless steel takes care and technique. To get the best results:

• Go slow – Use a slow drilling speed to prevent overheating
• Use cutting fluid or oil – Reduces friction and keeps the bit cool
• Apply steady pressure – Too much can snap the bit; too little can cause it to skid
• Secure your work – Use a drill press or clamp your workpiece firmly

Taking your time pays off with cleaner holes and longer-lasting bits.

Common Mistakes to Avoid

Avoid these errors when drilling stainless steel:

• Using wood bits that dull quickly
• Drilling too fast, which generates excessive heat and work-hardens the steel
• Skipping lubrication, leading to friction and early bit failure
• Failing to align or secure your work properly, resulting in crooked holes or broken bits

Maintaining Your Drill Bits

Caring for your bits extends their life and saves money:

• Clean after each use to remove shavings and debris
• Wipe with light oil to prevent rust
• Store in a dry, organised case
• Sharpen dull bits using a bench grinder or specialist sharpener