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4 Inch Diamond Blade (105mm): Precision Cutting for Tile & Stone
A 4 inch diamond blade (105 mm) is the smallest standard diamond saw blade for angle grinders. Compact and running at up to 14,500 RPM, it is the go-to blade for tilers and stone workers making precise cuts in ceramic tile, marble and granite in tight spaces.
Common Uses
- Cutting ceramic and porcelain tile to size on site
- Trimming marble and granite edges, outlets and curves
- Detail work: notches, L-cuts and plunge cuts
- Small repair jobs where a tile saw is unavailable
Which Rim Type for a 4 Inch Blade?
| Rim type | Thickness | Best for |
|---|---|---|
| Continuous rim | 1.8 mm | Chip-free ceramic, porcelain, marble |
| Ultra-thin turbo | 1.2–1.4 mm | Hard porcelain, granite — fast, fine cuts |
| Segmented | 1.8 mm | Concrete, brick, rough site cutting |
Advantages
- Precision: small diameter and light tool give excellent control for detailed cuts.
- Speed: high RPM compensates for small diameter — fast, clean cutting.
- Low cost: the cheapest entry into diamond cutting; long life per dollar on tile.
- Compatibility: 20/22.23 mm bore fits most 100–115 mm angle grinders.
Wet or Dry?
Quality 4 inch blades are rated wet/dry. For tile and marble, wet cutting extends blade life and eliminates dust; for quick site cuts, dry cutting in short passes with cooling breaks is acceptable.
FAQ
Can a 4 inch diamond blade cut granite?
Yes — choose a turbo or thin turbo rim with 7/10 mm segment height. Work in shallow passes and let the blade cool between cuts.
What is the difference between 105 mm and 115 mm blades?
105 mm (4") suits compact 4" grinders; 115 mm (4.5") fits the more common 4-1/2" grinder and gives slightly more depth and life.
How long does a 4 inch diamond blade last?
On ceramic tile, a quality hot-pressed blade can last hundreds of linear meters. Hard porcelain and granite shorten life — segment height (7 vs 10 mm) is the key spec.
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