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Rock drilling tools, Button Bits, Cross Bits,Chisel bits ,chisel rock bit, Henanzhongmei drill, Your mining drill export - details see: https://www.machineto.com/chisel-bit-cross-bit-chisel-bit-rock-drill-bit-10149596

taper chisel bit/cross bit/chisel bit/button bit/rock drill bit

The coal bits mainly used in coal and mine drilling.We can do different measures according to customer's requirements or drawing

taper chisel bit/coal drill bit/rock/chisel bit

type one

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

type 2

Colliery Tools	Main Standard(mm)
	D	M
Thread Joint	38	12
	40	12
	42	12