D miningwell Small Hole Tapered Bit 32mm 34mm 36mm 38mm 40mm 42mm taper button drill bits 3" rock drill bit

Drill bit classification:
tapered button bit drills directly into rock, which is the most vulnerable part in rock drilling tools. It is composed of rock drill carbide inlaid on the drill bit body. According to the shape of the rock drilling alloy used, the drill bits can be divided into the following categories: chip drill bits (mainly one-shaped drill bits, three-edged drill bits, cross-type drill bits, X-type drill bits), cylindrical tooth drill bits (with ball-tooth drill bits, high and low air pressure DTH drill bits), chip-tooth composite drill bits, roller cone drill bits, etc.

Chip bits are used for surface operations, while roller cone bits are mainly used for drilling and exploration. Due to factors such as structure and force, the chip-shaped drill bit has low rock crushing efficiency, slow footage, large amount of alloy, and is prone to waste. Among them, the in-line drill bit accounts for more than 80%, which is mainly used for small hole and shallow hole rock drilling. The cross-type and X-type drill bits are mainly used for tough medium and deep holes. Moreover, the maximum diameter is limited due to structural and stress reasons. Generally, the diameter of the in-line drill bit is not more than 45mm, the cross-type drill bit is not more than 64mm, and the X-type drill bit is not more than 89mm, otherwise it is easy to cause alloy fragmentation and lead to early failure.

We manufacture various tapered button bits in different degrees as below:
Bit diameter: 26mm to 60mm;
Tapered degree: 4°46’, 6°, 7°, 11°, 12°;
Shank sizes: Hex. 19mm, Hex, 22mm and Hex. 25mm;
Carbide type: Chisel type, Cross type, Button type.
Qty of button: 5, 7, 8 pcs