Tbm tunnel boring machine carbide tips coal mining rock drill bits
Type:1.TCI single cutter
2.Milled tooth(steel tooth) single cutter
Size:6 3/4,7 1/2,8 1/2,9 7/8,12 1/4,17 1/2...
IADC:standard IADC including 111 to 837
Bearing sealed:metal sealed,rubber sealed,not sealed.
Color:blue,golden,green or as customer requirements.
Formation:soft, soft to medium hard, medium hard, hard, very hard.
Packing:wooden case.
| IADC |
WOB (KN/mm) |
RPM (r/min) |
Applicable Formations |
| 111 | 0.3~0.75 | 200~80 |
Very soft formations with low compressive strength and high drillability, such as clay, mudstone, chalk, etc. |
| 121 | 0.3~0.85 | 200~80 |
Soft formations with low compressive strength and high drillability, such as mudstone, gypsum, salt, soft limestone, etc. |
| 131 | 0.3~0.95 | 180~80 |
Soft to medium formations with low compressive strength and high drillability, such as medium soft shale, hard gypsum, medium soft limestone, medium soft sandstone, soft formation with harder interbed, etc. |
| 211 | 0.35~0.95 | 180~80 |
Medium formations with high compress strength, such as medium soft shale, hard gypsum , medium soft limestone, medium soft sandstone, soft formation with harder interbed, etc. |
| 241 | 0.35~0.95 | 180~70 |
Medium hard formations with high compressive strength, such as abrasive shale, limestone, sandstone, dolomite, hard gypsum, marble,etc |
| 321 | 0.4~1.0 | 150~70 |
Hard semi-abrasive formations, such as abrasive shale,limestone,sand stone,dolomite, hard gypsum,marble,etc. |
