Irwin Granite Drill Bits - 3.0mm x 70mm
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The Irwin Granite Drill Bits (3.0mm x 70mm) are engineered for professional contractors and serious DIY enthusiasts who frequently work with high-density masonry, granite, and natural stone. These bits provide a significant performance boost in heavy-duty impact and percussion drilling, offering higher durability and precision for demanding projects; however, they are specifically optimized for hard materials and may show unnecessary wear if used on softer substrates like standard brick or wood.
All features
| Model Part Number | null} </code> |
|---|---|
| Brand | Irwin |
Extended Product Information
FAQs
Can I use these bits for metal drilling?
No, these are specialized for granite, concrete, and natural stone. Using them on metal will likely damage the carbide tip.
Do I need a special drill to use these bits?
They work with any standard drill, but they are most effective when used with an impact or percussion drill.
What is the expected lifespan compared to standard bits?
They are engineered to drill approximately 40% more holes than standard masonry bits.
How do I maintain these bits?
Keep them clean of stone dust and store them in a dry place to prevent corrosion of the steel shank.
Are these bits suitable for porcelain tile?
While they are very hard, they are designed for percussion drilling in stone/concrete. Always use a dedicated glass/tile bit for brittle materials like porcelain to prevent cracking.
Troubleshooting
Bit is getting very hot during use
Reduce drilling speed and clear dust from the hole more frequently to prevent friction buildup.
The hole is not the correct size
Ensure the drill is held perfectly perpendicular to the surface; uneven pressure can cause the bit to wander and create oversized holes.
Bit is struggling to penetrate the material
Check that the drill is set to percussion or hammer mode and verify the carbide tip is not chipped.
Pros and Cons
Pros
- Significantly higher lifespan than standard masonry bits
- Maintains hole diameter precision over time
- Optimized for the hardest natural stone surfaces
- Reduces tool replacement costs due to higher durability
Cons
- Not intended for use on soft wood or metal
- Higher initial cost than entry-level masonry bits
- Specific to harder substrates like granite and dense concrete
Setup, Compatibility & Care
For optimal results, ensure your drill is set to 'hammer' or 'percussion' mode. This bit is compatible with any standard drill chuck that supports a 3.0mm shank size. To prolong the life of the bit, avoid using excessive lateral force; let the bit's weight and the drill's percussion action do the work. After use, inspect the carbide tip for any signs of chipping. If you are drilling deep holes, regularly pull the bit out of the hole while the drill is still spinning to clear out stone dust and debris, which prevents the hole from becoming clogged and reduces friction-based heat.