Reference for buyers.
Quick charts our customers use when converting orders between inch and metric sizes, and when choosing grits.
Disc size conversion
Nominal inch sizes and the metric diameters and bores they usually refer to.
| Nominal | Diameter | Typical bore |
|---|---|---|
| 4" | 100 / 105 / 107 mm | 16 mm |
| 4½" | 115 mm | 22.23 mm (7/8") |
| 5" | 125 mm | 22.23 mm |
| 6" | 150 mm | 22.23 mm |
| 7" | 180 mm | 22.23 mm |
| 9" | 230 mm | 22.23 mm |
| 12" | 300 mm | 25.4 / 32 mm |
| 14" | 350 mm | 25.4 / 32 mm |
| 16" | 400 mm | 25.4 / 32 mm |
Grit guide
Lower numbers remove material faster; higher numbers leave a finer scratch pattern.
| Grit | Class | Typical use |
|---|---|---|
| 24–40 | Coarse | Heavy stock removal, rust, old paint |
| 60–80 | Medium | Shaping, weld blending, rough sanding |
| 100–180 | Fine | Surface preparation before finishing |
| 220–400 | Very fine | Sanding between coats, filler |
| 600–1500 | Extra fine | Wet sanding, paint correction |
| 2000+ | Ultra fine | Pre-polish, mirror finishes |
Safe use of bonded abrasives
Basic rules for cut-off wheels and grinding discs.
- Never exceed the maximum operating speed printed on the wheel.
- Use the guard supplied with the machine and the correct flanges.
- Do not grind with the face of a cut-off wheel.
- Wear eye, ear, hand and respiratory protection.
- Store wheels dry and use them before the expiry date on the label.
- Inspect every wheel before mounting; discard cracked or damaged wheels.
Export catalogue
Our full export catalogue with sizes, packing and carton details is available on request.
Tell us what you need.
Send your product list, sizes and target quantities. We reply with one consolidated quotation for the whole list.