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New Design Rotary Double Casing Drilling Bits

New Design Rotary Double Casing Drilling Bits

new design Rotary Double Casing Drilling Bits Application Range(DTH hammer type drilling inside the case) It can be widely used in drilling for grouting holes in projests such as cofferdam, foundation and geothermal well and etc. Features: 1.Hardening treatment of the parts surface with longer operating life and excellent anti-wear properties 2.Structure optimization Strengthen the structural 3.Superior performance Smooth with high efficiency

new design Rotary Double Casing Drilling Bits

Application Range(DTH hammer type drilling inside the case) It can be widely used in drilling for grouting holes in projests such as cofferdam, foundation and geothermal well and etc.

Features: 
1.Hardening treatment of the parts surface with longer operating life 
and excellent anti-wear properties 
2.Structure optimization Strengthen the structural 
3.Superior performance Smooth with high efficiency


Technical Data

A

B

C

D

E

F

G

outer dia

reamed dia

inner dia

thread

drill rod

drill bit dia

thread

(mm)

(mm)

(mm)

mm

mm

mm


118

125

88

104.5

76

83

R56

133

140

108

122

76

102

R56

146

152

120

134

89

116

R78

168

172

133

146.5

114

128

R83

216

225

178

203

114

165

R102











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