Taper Drill Rod

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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 0.6 m to 3.6 m in length—are measured from the collar to the bit end.

  • Taper Drill Rod
  • Bart KingKong
  • tapered drill rod
  • tapered drill steels
  • H19*108 mm, H22*108mm, H25*108 mm, H25*159 mm
  • 7°11°12°
  • Shank Hexagon
  • rock drilling, blasting holes,quarries, coal mines, traffic and other construction
  • 300mm to 8000mm
  • 55SiMnMo

Tapered Drill Rod is to provide 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 drill bit end. Tapered steel lengths are measured from the collar to the bit end. Holes are usually drilled in 0.6 m increments to accommodate the air leg feed length. The drilled steel is extracted and followed with a slightly smaller diameter rock drill bit on the next steel length in the sequence.


Carburization is a process used to harden the entire tapered drill rod surface both internally and externally to strengthen and extend the life of the tapered drill rod. 


Taper bit connection

taper bit connection



Rod Length

Taper Degree

Shank Style

mm

foot/inch


Hex22 × 108mm

500 ~ 8,000

1’ 8” ~ 26’ 2”

7°, 11° and 12°

Hex25 × 108mm

1500 ~ 4,000

4’11” ~ 13’1”

Hex25 ×159mm

1830 ~ 6,100

6’ ~ 20”

7° and 12°


Shank Hexagon: 19*108 mm, 22*108mm, 25*108 mm, 25*159 mm; 6, 7, 11, 12 degree taper in most lengths, taper degree of drill steel is mostly imports for excellent drilling productivity. 


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 our model no. PD-Y58 crawler hydraulic rock drill. Also for Y6, Y10, Y24, YT24, Mobile rock drills 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, drill hole diameter: 28mm-57mm.

Hollow Hexagonal Drill Steel04Hollow Hexagonal Drill Steel06Hollow Hexagonal Drill Steel07

Hollow Hexagonal Drill Steel05

Contact Amy Zhang for more details

Email: amy@kingkongdrills.com

Mobile: +86 13907256175 (Wechat/Whatsapp/Skype) 


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