GBR Series DTH Drill bit

DTH bits (also called DTH bits or spline connection bit) is connected through the drill bit spline and impactor, for impact orientation and rotation of a transmission, braze the broken rock. Mainly used in large mines (open pit and underground mining), open architecture, and a large stone mining engineering construction conditions.

Technical Data of GBR Series DTH Drill Bit(Middle ＆ Low Air Pressure)

Diameter		No x Buttons Diameter(mm)		Button Angle	Air Holes	Weight(Kg)
mm	inch	Gauge Buttons	Front Buttons	Button Angle	Air Holes	Weight(Kg)
Drill Bits for GBR1A Hammers
64	3 9/16	6x10	3x10	38	2	2.6
70	3 3/4	6x12	4x9	38	2	2.8
76	3 15/16	6x13	5x10	38	2	3.2
Drill Bits for GBR2A Hammers
76	3 9/16	6x13	5x10	38	2	3.6
80	3 3/4	6x13	5x11	38	2	4.0
90	3 15/16	6x14	5x12	38	2	4.2
Drill Bits for GBR3A Hammers
90	3 9/16	6x14	4x12	38	2	4.0
95	3 3/4	6x14	5x12	38	2	4.3
100	3 15/16	6x14	6x12	38	2	4.8
105	4 1/8	8x13	6x12	38	2	5.2