GD 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 GD Series DTH Drill Bit(High 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 GD35A Hammers
90	3 9/16	8x12	7x11	38	2	4.6
95	3 3/4	8x12	7x11	38	2	4.7
100	3 15/16	8x12	7x11	38	2	4.8
105	4 1/8	8x14	7x12	38	2	5.0
Drill Bits for GD45A Hammers
105	4 1/8	7x16	6x14	38	2	7.6
110	4 5/16	7x16	6x14	38	2	7.8
115	4 1/2	7x16	6x14	38	2	8.2
120	4 3/4	8x16	8x13	38	2	8.7
125	4 15/16	8x16	10x13	38	2	8.9
130	5 1/8	8x16	8x14	38	2	9.4
Drill Bits for GD55A Hammers
138	5 1/2	7x18	7x15	38	2	15.6
146	5 3/4	7x18	7x15	38	2	16.1
152	6	8x16	8x15	38	2	17.0
165	6 1/2	8x18	8x16	38	2	18.0
178	7	8x18	10x16	38	2	24.0
185	7 1/4	8x18	10x16	38	2	26.0
203	8	10x18	8x18+6x16	38	2	31.0
Drill Bits for GD65A Hammers
152	6	8x18	4x16+4x14	38	2	23.0
165	6 1/2	8x18	8x16	38	2	24.0
178	7	8x18	10x16	38	2	26.0
185	7 1/4	8x18	10x16	38	2	26.8
194	7 1/2	10x18	13x16	38	2	27.5
203	8	10x18	8x18 +6x16	38	2	31.0
216	8 1/2	10x18	8x18 +6x16	38	2	47.0
235	9 1/4	12x18	30x16	38	2	54.0
254	10	12x18	12x18 +8x16	38	2	65.0
Drill Bits for GD85A Hammers
203	8	10x18	8x18 +6x16	38	2	47.0
216	8 1/2	10x18	8x1 8+6x16	38	2	53.0
235	9 1/4	12x18	30x16	38	2	57.5
254	10	12x18	12x18 +8x16	38	2	61.0
275	11	12x18	12x18 +9x16	38	2	71.0
305	12	12x18	12x18 +9x16	38	2	95.0

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