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Drill Bit
R thread drill bit includes EX, EXX, EY, EYY, EC, ECC, etc.
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Description
Introduction:  

Drill bit is used for drilling, which is installed with anchor bars. As there is no need to pull out of the anchor bar, drill bit can be used for only one time. After the anchor bars are installed, drill bits will be left in the borehole. Sinorock provides a full range of drill bits to meet customers' requirements. Drill bit is widely used in tunnel pre-support, soil nailing, slope stabilization, building foundation, etc.

Characteristic:

1. It's suitable for various conditions, such as tunnel pre-support, soil nailing, slope stabilization, building foundation.
2. Easy installation.  
3. Different bits for kinds of rock formations, including cross-cut drill bit, button drill bit, tungsten carbide cross-cut drill bit, tungsten carbide button drill bit, clay bit, etc.

Main selection criteria for MAI SDA drill bits are:

1. Service life of the drill bits should be at least equal to the anchor bar.
2. Its performance design depends on different ground formations encountered.
3. Diameter depends on geotechnical conditions and design requirements. 


EYYECECC
                    EYY                                          EC                                      ECC                        
ESFESSFESSD
                    ESF                                       ESSF                                      ESSD                
EXXEYX
                    EXX                                         EY                                         X                                
Clay BitESDEX
   
              Clay Bit                                     ESD                                       EX

 
Size Outer Dia.
(mm)
Application Range (Advice)
EX Sand, fills, gravel
SSR25/42 42
SSR25/51 51
EXX Softer sedimentary rocks such as marls, mudstones, siltstone
SSR25/42 42
SSR25/51 51
ES-F Gravel, soft rock
SSR25/42 42
SSR25/51 51
ESS-F Weathered rock, stone walls, rubble
SSR25/42 42
SSR25/51 51
EY Chalk, gravel
SSR25/51 51
EX Sand, fills, gravel
SSR32/42 42
SSR32/51 51
SSR32/76 76
EX(Venturi)
SSR32/64 64
SSR32/76 76
EXX Softer sedimentary rocks such as marls, mudstones, siltstone
SSR32/42 42
SSR32/51 51
SSR32/64 64
SSR32/76 76
EXX(Venturi)
SSR32/76 76
Clay Bit Clay, soft soil, marls, loose sand or gravel
SSR32/76 76
SSR32/90 90
SSR32/100 100
SSR32/110 110
ES-F Gravel, soft rock
SSR32/42 42
SSR32/51 51
SSR32/64 64
SSR32/76 76
ESS-F Weathered rock, stone walls, rubble
SSR32/51 51
SSR32/64 64
SSR32/76 76
EYY Competent ground, strong rock
SSR32/51 51
SSR32/76 76
EY Chalk, gravel
SSR32/51 51
SSR32/76 76
EC Chalks, marls, fills, competent ground
SSR32/51 51
ECC Chalks, marls, fills, competent ground
SSR32/51 51
EX Sand, fills, gravel
SSR38/76 76
SSR38/90 90
SSR38/100 100
EX(Venturi)
SSR38/76 76
SSR38/90 90
EXX   Softer sedimentary rocks such as marls, mudstones, siltstone
SSR38/76 76
SSR38/90 90
SSR38/100 100
SSR38/115 115
SSR38/130 130
EXX(Venturi) 
SSR38/56 56
SSR38/76 76
SSR38/90 90
Clay Bit   Clay, soft soil, marls, loose sand or gravel
SSR38/90 90
SSR38/100 100
SSR38/110 110
SSR38/130 130
SSR38/150 150
ES-F   Gravel, soft rock
SSR38/76 76
SSR38/90 90
SSR38/115 115
ESS-F   Weathered rock, stone walls, rubble
SSR38/76 76
SSR38/90 90
SSR38/115 115
EYY   Competent ground, strong rock
SSR38/76 76
SSR38/90 90
EY   Competent ground, strong rock
SSR38/76 76
SSR38/90 90
EC   Chalks, marls, fills, competent ground
SSR38/76 76
ECC   Chalks, marls, fills, competent ground
SSR38/76 76
XX   Sand, clay, fills, gravel
SSR38/110 110
SSR38/130 130
SSR38/150 150
ESS-D Weathered rock, stone walls, rubble
SSR38/100 100
SSR38/115 115
EX Sand, fills, gravel
SSR51/90 90
SSR51/100 100
SSR51/110 110
SSR51/115 115
SSR51/130 130
SSR51/150 150
EXX Softer sedimentary rocks such as marls, mudstones, siltstone
SSR51/76 76
SSR51/90 90
SSR51/100 100
SSR51/110 110
SSR51/115 115
SSR51/130 130
SSR51/150 150
EXX(Venturi)
SSR51/115 115
SSR51/140 140
Clay Bit Clay, soft soil, marls, loose sand or gravel
SSR51/76 76
SSR51/90 90
SSR51/115 115
SSR51/130 130
SSR51/150 150
SSR51/175 175
ES-F Gravel, soft rock
SSR51/76 76
SSR51/100 100
SSR51/115 115
SSR51/130 130
ESS-F Weathered rock, stone walls, rubble
SSR51/76 76
SSR51/100 100
SSR51/110 110
SSR51/115 115
SSR51/130 130
SSR51/150 150
EY Chalk, gravel
SSR51/76 76
EC Chalks, marls, fills, competent ground
SSR51/115 115
XX Sand, clay, fills, gravel
SSR51/130 130
SSR51/150 150
SSR51/170 170
SSR51/200 200
ES-D Gravel, soft rock
SSR51/115 115
ESS-D Weathered rock, stone walls, rubble
SSR51/115 115


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