Having the correct diamond bore size is essential to ensure your blade works correctly and safely.
Choose the correct bore size (arbor hole) for your diamond blade so it fits your tool safely and runs smoothly.
✔ Match blade to your machine
✔ Avoid wobble and poor cutting
✔ Stay safe on site
| Bore Size | Common Tools |
|---|---|
| 22.23mm | Angle grinders (most common UK size) |
| 20mm | Small grinders / older tools |
| 25.4mm | Petrol cut-off saws |
| 30mm | Larger saws / floor saws |
❌ Wrong bore → won’t fit
❌ Loose fit → vibration and poor cuts
✔ Correct bore → safe, stable, accurate cutting
Always check your machine specification before choosing a blade.
👉 The bore size must match your tool spindle exactly.
👉 These two cover the majority of site work.
Some blades come with reduction rings to fit multiple bore sizes.
Most tools fall into just two sizes:
👉 Angle grinders → 22.23mm
👉 Petrol saws → 25.4mm
Our blades are selected for real site conditions — reliable fit, smooth cutting, and consistent performance.
✔ Accurate fit
✔ Reduced vibration
✔ Trade-ready
Ready to Choose the Right Blade?
👉 Shop Diamond Blades
👉 View Concrete Cutting Blades
👉 Read: Diamond Blade Sizes Guide
The bore size is the hole in the centre of the blade that fits onto your tool’s spindle.
It must match your machine exactly for safe operation.
The most common bore size is 22.23mm, used on most angle grinders.
Most petrol cut-off saws use a 25.4mm bore.
Only if you use a reduction ring to match your tool size.
Without it, the blade will not sit correctly and can be unsafe.
Most modern grinders use 22.23mm, but some older or smaller tools may use 20mm.
Always check your tool specification.
