Introduction
Sometimes you don't need a fine finish.
Sometimes you need to remove material – and fast.
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Rough shaping a granite block
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Grinding down a concrete hump
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Removing a thick weld seam
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Pre-shaping a hard ceramic blank
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Stripping heavy epoxy coating
For these jobs, a fine-grit grinding wheel is useless. It will take forever, generate excessive heat, and wear out quickly.
What you need is a coarse grit grinding head – something that bites into the material and removes it aggressively.
Enter the 50mm brazed diamond grinding head with 30/35 coarse grit.
In this article, we'll explain why coarse grit brazed diamond is the best tool for heavy stock removal, how to use it, and when to choose it over finer grits.
Part 1: What Is a 30/35 Coarse Grit Brazed Diamond Grinding Head?
Let's break down the name.
30/35 Grit – The "Aggressive" Range
Grit size refers to the size of the diamond particles. The smaller the number, the larger the particle.
| Grit | Particle Size (approx.) | Cut Rate | Surface Finish |
|---|---|---|---|
| 16/20 | ~1000 µm | Extremely aggressive | Very rough |
| 30/35 | ~500-600 µm | Very aggressive | Rough |
| 60/80 | ~200-250 µm | Aggressive | Medium |
| 120/140 | ~100-120 µm | Moderate | Smooth |
| 400+ | <50 µm | Fine | Very smooth |
30/35 is a coarse grit – large diamond particles that cut deep and remove material quickly. The resulting surface finish will be rough, but that's the point. You'll follow up with finer grits later if you need a smooth finish.
Brazed Diamond – The Technology
Unlike electroplated diamond (single weak layer) or sintered diamond (dull cutting action), brazed diamond uses a high-temperature chemical bond that:
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Holds diamond grains with extreme strength
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Allows grains to stand tall (high exposure)
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Prevents grain pull-out
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Provides very sharp cutting action
The Combination:
Coarse grit (30/35) + Brazed technology = Maximum material removal rate
Part 2: Specifications of This Grinding Head
| Parameter | Value |
|---|---|
| Outer Diameter | 50 mm |
| Height | 30 mm |
| Grit | 30/35 (coarse) |
| Abrasive | Brazed diamond |
| Mounting options | 16mm bore (plain) OR M18 threaded hole |
| Customization | Any bore size or thread type available |
| Max RPM | 8,000 – 12,000 |
Why 50mm Diameter?
| Diameter | Best For |
|---|---|
| 30-40mm | Detail work, small areas |
| 50mm | General heavy grinding – sweet spot for most applications |
| 75-100mm | Large area grinding, production |
The 50mm size is large enough to remove material efficiently but small enough to control and maneuver.
Why 30mm Height?
The 30mm thickness provides:
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Good surface contact for efficient grinding
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Long usable life before the tool wears out
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Stability during aggressive grinding
Part 3: Mounting Options – Get the Right Fit
This grinding head is available with two standard mounting options, plus full customization.
Option 1: 16mm Plain Bore
| Feature | Description |
|---|---|
| Bore type | Smooth hole, no threads |
| Diameter | 16mm |
| Mounting | Slides onto 16mm arbor/shaft |
| Securing | Set screw, nut, or clamp |
| Best for | Custom spindles, machines with straight arbor |
Option 2: M18 Threaded Hole
| Feature | Description |
|---|---|
| Bore type | Internal M18 thread |
| Mounting | Screws onto M18 male threaded spindle |
| Securing | Hand-tighten + wrench |
| Best for | Angle grinders, straight grinders with threaded spindle |