Introduction
In tool grinding, speed matters.
When you're removing large amounts of material from carbide blanks, you don't want to spend hours grinding. You want a wheel that cuts aggressively, removes material quickly, and gets you to the finishing stage as fast as possible.
That's where coarse grit grinding wheels come in.
Specifically, a resin bond diamond wheel with 46# grit is the tool of choice for aggressive stock removal on carbide and hard materials.
In this article, we'll explain why coarse grit wheels are essential for rough grinding, how 46# grit delivers maximum material removal, and how to get the best results from your roughing operations.
Part 1: The Role of Rough Grinding
Rough grinding is the first step in the tool grinding process. Its purpose is simple: remove material as fast as possible.
What Rough Grinding Achieves:
| Goal | Why It Matters |
|---|---|
| Fast material removal | Reduces cycle time |
| Prepare for finishing | Creates a basis for finer grinding |
| Shape the workpiece | Establishes basic geometry |
| Reduce finishing time | Removes bulk material before fine grinding |
Rough Grinding vs. Finish Grinding:
| Aspect | Rough Grinding | Finish Grinding |
|---|---|---|
| Grit size | Coarse (#36-60) | Fine (#120-400+) |
| Material removal | High | Low |
| Surface finish | Rough | Smooth |
| Depth of cut | Larger | Small |
| Time per part | Short | Longer |
| Goal | Remove material | Achieve finish |
Why You Can't Skip Rough Grinding:
| Reason | Explanation |
|---|---|
| Time | Fine grit wheels remove material slowly – roughing would take too long |
| Cost | Fine grit wheels are more expensive – using them for roughing wastes money |
| Heat | Fine grit wheels generate more heat when used for heavy removal |
| Wheel life | Fine grit wheels wear faster when used aggressively |
Part 2: Why 46# Grit?
Grit size determines the cutting action of the wheel. Coarser grits remove material faster.
Grit Comparison:
| Grit | Particle Size | Cut Rate | Surface Finish | Best For |
|---|---|---|---|---|
| 36#-46# | Very coarse | Very aggressive | Very rough | Heavy stock removal |
| 46#-60# | Coarse | Aggressive | Rough | General rough grinding |
| 80#-100# | Medium | Moderate | Medium | General grinding |
| 120#-200# | Fine | Slow | Smooth | Finishing |
| 400#+ | Very fine | Very slow | Very smooth | Polishing |
Why 46# Is the Sweet Spot for Roughing:
| Benefit | Explanation |
|---|---|
| Aggressive cutting | Removes material quickly |
| Good chip clearance | Large gaps between grains |
| Cool grinding | Sharp grains cut efficiently |
| Cost-effective | Good balance of performance and cost |
| Versatile | Works on carbide, tool steel, hard metals |
What 46# Grit Achieves:
| Result |
|---|