Introduction
In grinding and construction work, you often face a choice.
You can buy specialized tools for each job:
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A dressing stick for your grinding wheels
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A diamond cup wheel for concrete
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A grinding disc for stone
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A masonry wheel for brick and block
Or you can buy one tool that does all of it.
Enter the segmented sintered diamond grinding wheel.
With coarse grit and a segmented design, this single wheel can:
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✅ Dress ceramic-bonded grinding wheels
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✅ Grind natural stone (granite, marble, quartz)
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✅ Grind concrete and masonry
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✅ Remove material aggressively
In this article, we'll explain why this versatile wheel belongs in every shop – from tool rooms to construction sites.
Part 1: What Is a Segmented Sintered Diamond Wheel?
Let's break down the name.
Sintered Diamond
Sintered diamond is made by mixing diamond grit with metal powder (bronze, cobalt, or iron) and then sintering – heating and compressing until the metal fuses around each diamond grain.
Key characteristic: Diamond is distributed throughout the entire working layer – not just on the surface.
| Bond Type | Diamond Distribution | Life | Self-Sharpening? |
|---|---|---|---|
| Sintered | Throughout | ⭐⭐⭐⭐⭐ Longest | Yes |
| Brazed | Single layer | ⭐⭐⭐⭐ Long | No |
| Electroplated | Single layer | ⭐⭐ Short | No |
Segmented Design
Unlike continuous rim wheels, segmented wheels have individual diamond blocks (segments) separated by gaps.
| Feature | Continuous Rim | Segmented |
|---|---|---|
| Chip clearance | Poor | Excellent |
| Heat dissipation | Poor | Good |
| Cutting speed | Slower | Faster |
| Suitability for hard materials | Moderate | Excellent |
Coarse Grit
Coarse grit (#16-60) means larger diamond particles that cut deep and remove material quickly.
| Grit | Cut Rate | Finish | Best For |
|---|---|---|---|
| #16-30 | Extremely aggressive | Very rough | Heavy removal |
| #30-50 | Aggressive | Rough | General grinding |
| #50-60 | Moderate-aggressive | Medium | Dressing, finishing |
Part 2: Application 1 – Dressing Ceramic Grinding Wheels
What Is Dressing?
Grinding wheels wear. Abrasive grains become dull. The wheel surface loads up with swarf. The wheel goes out of round.
Dressing restores the wheel:
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Removes dull grains
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Exposes fresh, sharp abrasive
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Restores concentricity
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Improves surface finish on workpieces
Why Dressing Ceramic Wheels Is Difficult
Ceramic-bonded wheels (alumina, silicon carbide, CBN, diamond) are very hard. Soft dressing sticks (silicon carbide) wear out quickly. Single-point diamond dressers work, but they're slow.
| Dressing Tool | Speed on Ceramic Wheels | Cost |
|---|---|---|
| Dressing stick (SiC) | Very slow | Low |
| Single-point diamond | Slow | Moderate |
| Segmented diamond wheel | Fast | Moderate (but long life) |
How a Segmented Diamond Wheel Dresses:
| Step | Action |
|---|---|
| 1 | Mount the segmented diamond wheel on a grinder |
| 2 | Mount the ceramic wheel to be dressed on a spindle |
| 3 | Bring the diamond wheel into contact |
| 4 | Traverse across the ceramic wheel face |
| 5 | Result: True, sharp ceramic wheel in seconds |