Percussive Drilling Rods

Percussive Drilling Rods or called Top Hammer drilling rods Introduction:

1). Handheld drill rods.

For hand held drills, hexagonal steel is used exclusively in diameters 22mm (7/8") and 25mm (1.0"). This provides a hexagonal chuck section to provide leverage for the rotation chuck bushing. It usually has a forged collar to maintain the proper striking face position in the rock drills; and a tapered bit end or with integral chisel or cross carbide bits.

2).  Round drill rods

Round cross sections are more prevalent for extension drilling applications. A round drill rod has less material and thus is lighter to handle and less expensive than a hexagonal rod of equivalent size.

3).  Hexagon drill rods

Hexagonal steel is particularly advantageous for drifting and tunneling. The increased rigidity of hexagonal steel enables it to maintain a straighter hole and enhances fushing for cleaner holes. Even with the larger cross section, hex steel can still accommodated the same diameter of bit as that of an equivalent round steel.

4).  Male / Female drill rods

Male / Female or M/F drill steel or called speed rods provides more rigid connections and is easier to uncouple and handle. The service life also tends to be better than with separate couplings. The advantages of drilling with M/F steel include: easy handling, quicker uncoupling, tighter connections and potential to drill straighter holes.