Tapered drill rod

Tapered drill rod, another name called taper rod, tapered drill steels, this provides a hexagonal chuck section to provide leverage for the rotation chuck bushing. It usually has a forged collar to maintain the proper shank striking face position in the rock drill, and a tapered bit end. Tapered steel lengths— available from 0.6m to 3.6 m in length—are measured from the collar to the bit end.

Shank Hexagon: 19 x108 mm, 22x 108mm, 25 x108 mm, 25 mmX159 mm 6, 7, 11, 12 degree taper in most lengths, taper degree of drill steel is mostly imports for excellent drilling productivity.

Tapered drill rod


For drilling medium-hard to hard and abrasive rock formations, taper angles of 11 and 12-degrees are
normally used on modern drill rigs, like YT28B, YT29A, Y24, YT24, Mobile rock drill pneumatic and hydraulic.

For low impact rock drills and softer rock formations, a narrow tape range of 7 degrees is used, such as
Indian, Saudi’s granite and marble quarry.
A comprehensive range of taper button bits, cross bits and chisel bits with 6, 7, 11, 12 degree taper.


Types Tapered drill rods, Integral drill rods, Plug hole rods
Application: Tapered drill rods are used in granite and marble quarry, gold mine, railway, tunnel, etc. for drilling
Material: High quality carbide and high-quality steel
MOQ: No requirement for testing and trial order
We can produce as your request of carbide size, different length of drill rods.
Types of drill rods Specifications Length (mm) Shank Weight (kg)
Tapered drill rods Taper Angle: 4, 6, 7, 11, 12 degree 400mm to 8000mm Hex22mm*108mm Hex25mm*159mm Hex19mm*108mm
Other shank can be made according to your requirement
1.7 - 24.9
Integral drill steel Bit diameter: 26mm, 28mm, 30mm, 32mm, 34mm, 36mm, 38mm, 40mm, 42mm 400mm to 4800mm 3 – 15.4
Plug hole rods Chisel bit diameter: 17mm, 20mm, 22mm 150mm to 710mm 0.6 - 2.9
When you want to order, please inform us the information as follows:
Shank Style + Effective Length + Bit  Diameter