The company is specialized in manufacturing DHT bit, DHT hammer, air-leg rock drill, product quality has reached advanced level in the industry.
 
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Caing tubes

ZRTG Series Concentric Casing System Technical Specifications
P/N Out Dia. Of casing tube Inner Dia. of casing tube Reamed Dia. Min. inner Dia. of casing shoe Max out Dia. of DTH bit DTH Hammer
ZRTG105 146 126 152 115 105 ZRC4 series
ZRTG125 168 148 174 136 125 ZRC5 series
ZRTG135 178 158 184 146 135 ZRC5 series
ZRTG140 183 163 189 152 140 ZRC5 series
ZRTG165 219 199 225 184 165 ZRC6 series
ZRTG220 273 251 280 240 220 ZRC8 series

ZRPG Series Concentric Casing System Technical Specifications
P/N Out Dia. Of casing tube Inner Dia. of casing tube Reamed Dia. Min. inner Dia. of casing shoe Max out Dia. of DTH bit DTH Hammer
ZRPG146 146 mm 126-132 mm 154 mm 117 mm 117 mm ZRC4 Series
ZRPG168 168 mm 148-155 mm 184 mm 140 mm 140 mm ZRC5 Series
ZRPG178 178 mm 158-165 mm 194 mm 148 mm 148 mm ZRC5 Series
ZRPG183 183 mm 163-170 mm 198 mm 156 mm 156 mm ZRC5 Series
ZRPG219 219 mm 199-206 mm 231 mm 188 mm 188 mm ZRC6 Series
ZRPG273 273 mm 251-257 mm 300 mm 241 mm 240 mm ZRC8 Series

ZRHG Series Concentric Casing System Technical Specifications
P/N Out Dia. Of casing tube Inner Dia. of casing tube Reamed Dia. Min. inner Dia. of casing shoe Max out Dia. of DTH bit DTH Hammer
ZRHG168 168 mm 148-155 mm 184 mm 140 mm 140 mm ZRC5 Series
ZRHG178 178 mm 158-165 mm 194 mm 148 mm 148 mm ZRC5 Series
ZRHG183 183 mm 163-170 mm 198 mm 156 mm 156 mm ZRC5 Series
ZRHG219 219 mm 199-206 mm 231 mm 188 mm 188 mm ZRC6 Series
ZRHG273 273 mm 251-257 mm 300 mm 241 mm 240 mm ZRC8 Series

 

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Add:No.3701, Zhuangjian Road, Kuiwen Economic Development District, Weifang City, Shandong Province, China