Tapered drill rods

With one side connected to rock drill and the other side connected with taper drill bit, the taper drill rod transmits power from rock drill to bit, drilling work is thus performed. Tapered drill rod is a further development of the integral drill rods. It usually has a forged collar to maintain the proper shank striking face position in the rock drill.

  • Shank sizes: H22*108mm/ H25*108mm/H25*159mm.
  • Taper degrees: 7°, 11°, 12°.
  • Length: 400 – 8000mm
  • Raw material: 55SiMnMo,40SiMnCrNiMo,23CrNi3Mo
  • Production processes: involving multiple processes, such as steel rolling, forging, normalizing,quenching and tempering, etc.
  • Over 15 years experience in rock drilling TooLS industry.
  • Shandike only uses high-quality raw materials.
  • We set up our products standard matched with world leading brands.
  • Advanced processing equipment extends the service life of products.

Introduction to tapered drill rods

Tapered drill rod effective lengths are measured from the collar to the bit end, which are usually from 0.6meter to 3.6 meters.


Shank sizes: Hex.19mm, Hex. 22mm, Hex.25mm
Taper degrees: 7°, 11°, 12°.
Length: 400 – 8000mm.


Drilling duties in tunneling, construction, mining, quarrying, etc.

The relationship between taper angle and taper end diameter

Tapered Drill Rods
Taper DegreeShort/LongTaper End
Tapered Drill Rods4°46’Short Skirt19.1mm
Short Skirt16.0mm
11°Short Skirt18.0mm
12°Short Skirt16.8mm
12°Long Skirt14.9mm

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