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Cobalt Drill Bit Set - 10pc - 2.5mm - BlueSpot

Cobalt Drill Bit Set - 10pc - 2.5mm - BlueSpot

The Blue Spot Tools 10 PCE Cobalt Drill Bits (2.5mm) are engineered for professionals and DIY enth...

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B&QB&Q - Blue Spot Tools10 Pce Cobalt Drill Bit Set 2.5mm
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eBayBlueSpot Metal Hss Cobalt Drill Bits Set 10pc 2.5mm For Steel Wood Plastic
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Product Information

Full details

The BlueSpot 10-piece Cobalt Drill Bit set is designed for professional contractors and dedicated DIYers who require high-performance tools for drilling into tough materials like stainless steel and iron. Featuring a 5% cobalt alloy composition, these bits offer excellent heat resistance and longevity during demanding tasks, though they require careful handling as the cobalt-infused steel can be more brittle than standard high-speed steel bits.

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BrandBlueSpot

Extended Product Information

FAQs

Can I use these on masonry or concrete?

No, these cobalt bits are designed for metal, plastic, and wood. They will not effectively penetrate masonry or concrete.

Do I need a special drill to use these bits?

No, they fit any standard drill chuck that can accommodate a 2.5mm shank.

How do I maintain the sharpness of the bits?

Use them at appropriate speeds for the material being drilled and use cutting fluid to prevent overheating, which is the primary cause of dulling.

Is this set suitable for heavy-duty stainless steel drilling?

Yes, the 5% cobalt composition is specifically intended for tough materials like stainless steel.

Are these bits impact rated?

These bits are designed for standard rotary drilling and are not intended for use in impact drivers.

Troubleshooting

Bit overheating and smoking during operation

Reduce drill speed, increase pressure slightly, and apply a small amount of cutting oil to dissipate heat.

Bit snaps inside the workpiece

Ensure the drill is perfectly perpendicular to the surface and avoid moving the drill side-to-side during the cutting process.

Pros and Cons

Pros

  • High heat resistance due to 5% cobalt content
  • Precision-ground flutes ensure accurate, clean holes
  • Versatile application across metals, plastics, and wood
  • Reusable storage tube keeps bits organized

Cons

  • Small 2.5mm size is susceptible to snapping if side-loaded
  • Brittle material composition requires steady drilling pressure
  • Limited to one specific size (2.5mm) per set

Setup, Compatibility & Care

  • Compatibility: These bits are compatible with all standard 3-jaw drill chucks capable of securing a 2.5mm shank.
  • Setup: Ensure the workpiece is securely clamped before drilling. Do not use excessive force; allow the sharpness of the cobalt edge to do the work.
  • Care: After use, wipe bits clean of metallic debris. Store them in the provided tube to prevent moisture exposure and chipping. If bits become dull, they should be resharpened using a specialized tool grinder rather than a standard file.

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