The best 4wings Hard alloy coal drill bit

Match: all kinds of drill pipe Applied working places: soft rock and hard rock. Dia: 27mm-175mm

1,Hard alloy coal drill bit introduction

Hard alloy drill bits are main tools widely used in percussion drilling. We produce Chisel bit, cross bit, three-wing bit, button bit and so on. Material: high-class alloy bitCraft: forgingApplication: the drilling of limestone, moorstone, marble; the drilling operation of iron mine, goldmine and so on.

2,Hard alloy coal drill bit parameters

NO.	specification (mm)				drill type
	Dia.(mm)	contact size(mm)
1	27		M12/8	M14*1.5	2
2	28		M12/8	F12*12	2
3	30		M12/8	F12*12	2
4	32		M14×1.5/8	F12*12	2
5	34		M14×1.5/8	F12*12	2
6	36		M14×1.5/8	F12*12	2
7	38		T24×5/12	F14*14	2--3
8	42		T24×5/12	F13-14	2--3
9	45		T24×5/12	F13-18	2--3
10	55		T24×5/12	F13-18	4

3,Hard alloy coal drill bit photos

The best 4wings Hard alloy coal drill bit