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Common specification（mm） | φ96/φ98 | φ120 | φ133 | φ153 | |
parameters | Blade numbers | 3/4 | 3/4/5 | 3/4/5 | 4/5/6 |
Main cutter dimensions （mm） | 13.44 | 13.44/15.88 | 13.44/15.88 | 15.88 | |
Main cutter number | 8~14 | 14~18 | 16~20 | 17~24 | |
Gauge cutter | Cemented carbide or PDC | Cemented carbide or PDC | Cemented carbide or PDC | Cemented carbide or PDC | |
Number of holes | 3/4 | 3/4/5 | 3/4/5 | 4/5/6 | |
Drilling parameters | Drilling pressure（kN） | 20~40 | 30~50 | 40~60 | 50~70 |
Rotary speed（rpm） | 150~300 | 120~260 | 120~260 | 100~240 | |
Pump capacity（L/min） | 150~300 | 200~360 | 200~360 | 250~480 | |