2012 best selling coal mining drill bits/angur drill bit

Specifications

1.tungsten carbide drill bit,coal mining drill bit
2.low price and supreme quality
3.manufacturer
4.Certified by ISO9001

coal bit/coal mining bits

Product Description:
Applications:

 Apply to the anchor-network support hole drilling in coal mine, hydraulic project. Etc.
Characteristics:
1. High wear resistance and impact-resistance toughness.
2. To repeat repair & greaning are not necessary, long drill life.
3. High efficiency could be promoted sharply in penetration of high-medium hard rock formation.
4. Labour intensity could be reduced.
5. Rock formation to be suitable t: F=4-12

We can manufacture all kinds of bits and shells according to customer's special requirement.

Any requirement please contact us, we'll do the best service for you. Hope we can establish a good business relationship

 

Colliery Drilling Tools	Main Standard(mm)
	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