This boring head adopts the internal double bearings,guide pad doesn't rotate along with the tool, it has the least wear and the flexible turning. The size adjustment can be achieved by replacing guide stripe or increasing & reducing the shim. The size of cartridge can be adjusted in a certain range. It is very convenient and re-liable.
| Cartridge size | Boring bar models | Cartridge size | Boring heads models |
| Φ32 | Φ27 | Φ88-Φ107 | 80 |
| Φ35 | Φ30 | Φ108-Φ137 | 100 |
| Φ50-60 | Φ43 | Φ138-Φ177 | 100 |
| Φ61-72 | Φ56 | Φ178-Φ300 | 160 |
| Φ73-77 | Φ65 | >300-500 | 100 |
| Φ78-87 | Φ70 |