8 1/2'' IADC 637 Replaceable Type
Features:
Bigger cone ,TCI covers full cones, longer working life
Shirttail hard enhanced by Tungsten Carbide
Journal sealed bearing with TCI protection on heel of cones
14mm conical-ball TCI
Drilling for hard rock hardness more than 100MPa, bigger diameter Inserts brings higher wear resistance and lower inserts breakage rate.
Size | 8 1/2'' | | |
IADC Code: | 6-3-7 |
Bearing: | Journal bearing |
Sealing: | O-ring |
Cutting structure: | Conical |
Rows/Qty: | 6/48 7/52 |
Shirttail/Lug | Welding carbide & adding inserts |
