Circular Saw Blade Diameter Comparison
Circular saw blades are available in multiple diameters for different applications. The blade diameter determines the maximum cutting depth and the type of saw the blade fits.
Selecting Blade Diameter
The blade diameter must match the saw specification. Using an undersized blade reduces cutting capacity. Using an oversized blade is dangerous and can cause kickback or contact with the saw housing.
Metric Equivalents
Blade sizes are typically specified in inches in North America and millimeters in other regions. The metric sizes are not always exact conversions and may differ slightly between manufacturers.
Cutting Depth
Maximum cutting depth at 90 degrees is approximately the blade radius minus the saw’s arbor height. Actual cutting depth varies by saw model and blade design.
Comparison
| Diameter | Metric | Max Cut (90°) | Common Arbor | Typical Use |
|---|---|---|---|---|
| 4-1/2" | 115mm | 1-1/8" | 3/8" | Compact cordless saws |
| 5-3/8" | 136mm | 1-5/8" | 10mm | Trim saws |
| 6-1/2" | 165mm | 2-1/8" | 5/8" | Cordless circular saws |
| 7-1/4" | 184mm | 2-1/2" | 5/8" | Standard circular saws |
| 8-1/4" | 210mm | 2-7/8" | 5/8" | Worm drive saws |
| 10" | 254mm | 3-1/8" | 5/8" | Table saws, miter saws |
| 12" | 305mm | 4" | 1" or 5/8" | Full-size miter/table saws |
Availability
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Sources
- Manufacturer documentation
- Industry standards
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