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Tapered Hexagonal Shank Steel Drill Rod for Mining

Tapered Hexagonal Shank Steel Drill Rod for Mining

Application of Tapered Drill Rods: The tapered drill rod is used for rock drilling, blasting holes and other drilling works in the quarries, coal mines, traffic and other constructions. For drilling medium-hard to hard and abrasive rock formations, Taper angles of 11 and 12-degrees are normally...

Application of Tapered Drill Rods:

The tapered drill rod is used for rock drilling, blasting holes and other drilling works in the quarries, coal mines, traffic and other constructions.


For drilling medium-hard to hard and abrasive rock formations, Taper angles of 11 and 12-degrees are normally used on heavy-duty modern hydraulic drill rigs. While, 6,7degree rods will be applied for light-duty rock drill ,such as the pneumatic rock drill Y6, Y10, Y24, YT24,Y26,Y19A,YT27,YT29,YT28…and the line drilling rigs.


Component of tapered drill rods:

Tapered drill rod (taper steel rod, tapered drill steels), it 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. 

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Characteristic of Tapered Drill Rods:

(1) Shank Hex: 19 x108mm, 22x108mm, 25 x108mm, 25X159mm,

(2) Taper degree: 4°, 4°46″,6°,7°,11°,12°

(3) Length: 0.4m - 6m

 

Specification of Tapered Drill Rods: 

Model

Taper Degree

Drilling Rod Length

Shank Size

Hex.19mm

4.46, 6,, 7 11, 12

0.4m-4.0m

83mm,108mm

Hex.22mm

4.46, 6, 7, 11, 12

0.8m-6.0m

83mm,108mm

Hex.25mm

4.46,6, 7 ,11, 12

0.8m-6.0m

108mm,159mm

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