Sinorock® has different types of drill bits like EX and EXX.

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Home > Product > Self Drilling Anchor Bolt System > R Thread Anchor System > Drill Bit

Drill Bit

R thread drill bit includes EX, EXX, EY, EYY, EC, ECC, etc.

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.

Clay Bit

EX

ESF

X

EXX

ESSF

EY

EC

ESD

EYY

ECC

ESSD

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	Chalk, gravel
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	Chalks, marls, fills, competent ground
ECC		Chalks, marls, fills, competent ground
SSR32/51	51	Chalks, marls, fills, competent ground
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	Chalks, marls, fills, competent ground
ECC		Chalks, marls, fills, competent ground
SSR38/76	76	Chalks, marls, fills, competent ground
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	Chalk, gravel
EC		Chalks, marls, fills, competent ground
SSR51/115	115	Chalks, marls, fills, competent ground
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	Gravel, soft rock
ESS-D		Weathered rock, stone walls, rubble
SSR51/115	115	Weathered rock, stone walls, rubble