Diamond Grit & Bond Selection Guide
Choose the Right Diamond Tools for Every Concrete Grinding Application
Understanding Diamond Tool Structure
Diamond tools consist of two key components
Diamond Grit
Controls:
- Cutting aggressiveness
- Surface finish
- Grinding speed
Bond System
Controls:
- Diamond exposure
- Tool life
- Performance on different concrete hardness
Diamond Grit Selection
| Grit Size | Application | Surface Result |
|---|---|---|
| 16-30# | Heavy grinding / coating removal | Aggressive removal |
| 40-60# | Concrete leveling | Medium grinding |
| 80-120# | Surface preparation | Smooth surface |
| 150-300# | Fine grinding | Refined finish |
| 400#+ | Polishing preparation | High smoothness |
Lower grit number = More aggressive cutting
Higher grit number = Finer surface finish
Diamond Bond Hardness Guide
Soft Bond
✓ Faster diamond exposure
✓ Better cutting efficiency
✓ Prevents glazing
Medium Bond
✓ Balanced cutting speed
✓ Longer tool life
✓ Most common choice
Soft Concrete
✓ Longer lifespan
✓ Controlled wear rate
✓ Better cost efficiency
Concrete Hardness vs Bond Selection
| Concrete Hardness | Concrete Condition | Recommended Diamond Bond |
|---|---|---|
| Soft Concrete | Soft, abrasive concrete with faster diamond wear | Hard Bond |
| Medium Concrete | General concrete conditions with balanced hardness | Medium Bond |
| Hard Concrete | Dense, hard concrete with slow diamond exposure | Soft Bond |
Mohs Hardness Test
| Concrete Hardness Level | Diamond Tool Recommendation |
|---|---|
| Soft Concrete | Use Hard Bond diamond tools to extend tool life |
| ↓ | ↓ |
| Medium Concrete | Use Medium Bond diamond tools for balanced performance |
| ↓ | ↓ |
| Hard Concrete | Use Soft Bond diamond tools for better cutting efficiency |
Common Grinding Problems & Solutions
| Problem | Cause | Solution |
|---|---|---|
| Tool glazing | Bond too hard | Use softer bond |
| Fast wear | Bond too soft | Use harder bond |
| Low grinding speed | Wrong grit | Select lower grit |
| Uneven surface | Incorrect sequence | Follow grinding process |
Concrete Grinding Process
From Rough To Smooth,Step By Step
FAQ
Which tool should I use for epoxy removal?
PCD tools are the preferred choice for removing epoxy coatings quickly and efficiently.
What grit should I start with?
For uneven concrete, begin with coarse metal bond tools such as 16 or 20 grit, then progress to finer grits according to the floor condition.
Can I skip hybrid pads?
Hybrid pads help bridge the transition between metal bond and resin polishing, improving scratch removal and polishing consistency. Whether they can be skipped depends on the floor condition and the required finish.
How do I choose the right bond?
The bond hardness should match the concrete hardness: soft bond for hard concrete and hard bond for soft, abrasive concrete.
Need Help With Concrete Grinding?
Send us your floor photo and we will recommend the right solution.