BLOGS
4 Inch Circular Saw Blade for Wood (110mm): 30T vs 40T Guide
The 4 inch circular saw blade for wood (110 mm) is the compact TCT blade for trim saws, mini circular saws and cordless saws. Light and fast, it delivers burr-free cuts in plywood, boards and panels where a full-size saw is too bulky.
Specifications
| Diameter | Body thickness | Kerf | Bore | Teeth |
|---|---|---|---|---|
| 110 mm (4") | 0.9–1.1 mm | 1.2–1.4 mm | 20 mm | 30T |
| 110 mm (4") | 0.9–1.1 mm | 1.2–1.4 mm | 20 mm | 40T |
| 125 mm (5") | 0.9–1.1 mm | 1.2–1.4 mm | 20 mm | 30T / 40T |
30T vs 40T — Which Tooth Count?
| 30T | 40T | |
|---|---|---|
| Cut speed | Faster | Moderate |
| Edge finish | Good (construction) | Fine (visible edges) |
| Best for | Framing, rough cuts, ripping | Plywood, panels, furniture work |
Best Uses
- Cutting plywood and veneered panels to size
- Trim work, shelving and cabinet carcasses
- Flooring installation cuts (with fine-tooth blade)
- DIY furniture and craft projects
Tips
- Confirm the 20 mm bore matches your saw (reducer rings exist for some saws).
- Cut with the good face down (circular saws) to avoid tear-out on the visible side.
- Thin kerf (1.2–1.4 mm) is ideal for cordless saws — less battery drain.
FAQ
Can a 110 mm wood blade cut MDF?
Yes — choose 40T for clean MDF edges. MDF is abrasive, so carbide tips are essential.
Is 4 inch the same as 110 mm?
Close enough for this class: blades are sold as 110 mm (some markets 100/105 mm). Check bore and max RPM compatibility with your saw.
Can I use a wood blade on plastic or aluminum?
Wood ATB blades are not designed for metal. Use a TCG aluminum blade for non-ferrous metals and plastics.
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