DTH Symmetrix bit

• Product description：DTH Concentric casing drilling system or called Symmetrix casing drilling system.

Model	Casing O.D	Casing I.D	Ring Bit O.D	Ring Bit I.D	Normal bit max O.D	Hammer	Weight (kg)
Symmetrix 114	114 mm	101 mm	122 mm	80 mm	78 mm	DHD3.5	11.5
Symmetrix 127	127 mm	107 mm	136 mm	93 mm	91 mm		15
Symmetrix 133	133 mm	113 mm	141 mm	96 mm	94 mm	DHD340	15.5
Symmetrix 139	139 mm	119 mm	147 mm	102 mm	100 mm		19.5
Symmetrix 152	152 mm	132 mm	160 mm	114 mm	112 mm		25
Symmetrix 168	168 mm	148 mm	177 mm	130 mm	128 mm	DHD350	36.5
Symmetrix 177	177 mm	157 mm	187 mm	139 mm	137 mm		43
Symmetrix 193	193 mm	167.6 mm	203 mm	152 mm	150 mm	DHD360	49
Symmetrix 219	219 mm	193.6 mm	232 mm	175 mm	173 mm		61
Symmetrix 244	244 mm	218.6 mm	254 mm	198 mm	196 mm	DHD380	78
Symmetrix 254	254 mm	228.6 mm	266 mm	205 mm	203 mm		90
Symmetrix 273	273 mm	247.6 mm	285 mm	224 mm	222 mm		130
Symmetrix 323	323 mm	297.6 mm	338 mm	271 mm	269 mm		188
Symmetrix 406	406 mm	380.6 mm	420 mm	350 mm	348 mm	SD12	335
Symmetrix 457	457 mm	431.6 mm	477 mm	376 mm	374 mm		440
Symmetrix 508	508 mm	476 mm	524 mm	444 mm	442 mm		520