Coal Mining Drill Bit

27mm 28mm 32mm 42mm 43mm two wing coal mining drill bits manufacturer

Type: DRILL BIT
Material: 42CrMo
Use: Coal Mining
Diameter: 27mm, 29mm
Product description: 27mm 28mm 32mm 42mm 43mm two wing coal mining drill bits manufacturer are mainly used in soft strata.
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27mm 28mm 32mm 42mm 43mm two wing coal mining drill bits manufacturer

Coal bits are mainly used in coal and mine drilling, have dry-type & wet-type.

1. Mainly used in coal and mine drilling
2.Dry and Wet Type available
3.Dimension:25, 27, 28, 29, 30, 32, 36, 42 mm.
4.Normal Thread Model:M16*2;M14*1.5, M12*1.75;M14*1.5;M12*1.75
5.We can do different measures as per customers demand.

Specifications of twin wing coal bits

Colliery Drill Tools	Main Standard(mm)
Colliery Drill Tools	D	H	L	M
Thread joint	27	44	17	M14×1.5
	27	54	17	M12×1.75
	28	54	20	M12×1.75
	29	52	18	M14×1.5
	30	50	18	M14×1.5
	32	52	22	M14×1.5
	32	56	22	M12×1.75

A. Selected higher quality diamond powder, improved the sintering technique, enhanced the bond combination strength between diamond grain
B.Improved the inner structure of the sintered cavity, the pressure and temperature become more balance, which ensure the cutter has more stable performance
C.Adopted a new type of carbide, which improved the weld strength
D.Optimized the designation of joint face, which reduced the residual stress