The grinding discs are specially made and suitable for oil field, oil refinery and gas pipeline.
| Art.No. | D×H×d | MAX.SPEED | Outer packing | Volume(cm) | |
| 2 nets | Inches | mm | 80m/s | ||
| 271501 | 5×1/8×7/8 | 125×3×22.2 | 12200R.P.M | 20kg/200pcs/1ctn | 46×27×14 |
| 271502 | 5×5/32×7/8 | 125×4×22.2 | 12200R.P.M | 25kg/200pcs/1ctn | 54×32×17 |
| 271503 | 6×1/8×7/8 | 150×3×22.2 | 10200R.P.M | 27kg/200pcs/1ctn | 46×27×14 |
| 271504 | 6×5/32×7/8 | 150×4×22.2 | 10200R.P.M | 30kg/200pcs/1ctn | 54×32×17 |
| 271505 | 4 ½×1/8×7/8 | 115×3×22.2 | 13300R.P.M | 14kg/200pcs/1ctn | 40×25×13 |