Rock Drilling Tools Jack Hammer Small Hole Drilling Tapered Button Bits for Marble Rock Quarrying:

The top hammer rock drilling tools tapered button bits are widely applicable to mining industry, tunneling and underground engineering, open pit, construction drill, blast industry, civil engineering operations, road, gas line, pipe and trench projects, quarry work, rock anchoring and ground stabilization projects, water well industry, etc.

30mm, 32mm, 33mm, 34mm, 36mm, 38mm, 40mm, 41mm, 42mm, 43mm ballistic button bits is suitable for H22mm and H25mm taper rock drill rods use. It have three taper connection: 7°, 11°, 12°. It's widely used for hard rock (f=8 ~ 18) drilling usage:

1) Tapered connection: 11 degree
2) Alloy steel: 42CrMo
3) Suitable carbide tips: YK20, Yk05
4) Cross bit diameter: 30-42mm
5) Button Qty: 7 buttons
6) Technology: hot-pressing or welding