7 / 11 / 12 Degree Taper Chisel Drill Bit for Small Hole Rock Drilling Tools
Tapered equipment affords drillers the ability to change drilling bits whilst still using the same drilling rod. Drillers choose tapered cross type bits if the goal is to minimize hole deviation in small hole range drilling. Different taper sizes have different characteristics when it comes to the “knock-off” index – the smaller angle will prevent the bit from spinning. Used in drifting and tunneling.
Taper Drill Bit
4°, 6°, 7°, 11°, 12°
26mm - 41mm (or 1 inch to 1 3/5 inch)
Drill Bit Type
Chisel bit, button bit, cross bit
Spherical and ballistic
Button Bit's Skirt Design
Short skirt, long skirt
Chisel Bit Type
Standard chisel bit, oblique chipways chisel bit,
flat chipways chisel bit, oblique flat chipways chisel bit
High strength alloy steel bar and tungsten carbide
Green, Gold, Black or based on customer requirements.