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Customized Hollow Rock Drilling Steels

China King-Long Brand Rock Drilling Tools
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King-Long Brand Rock Drilling Tools

A: 50 Years Rock Drilling Production Experience;

B: Country-owned Enterprise Built in year of 1970.

C: 20 Years Drill Steels Study Research Efforts.

D: 10 Years Tungsten Carbides Study Research.

E: 20 Years Sophisticated Production Experience and Rock Drilling Business Service more than 25 countries all around the world.


China King-Long Material is proud to introduce King-Long Hollow Rock Drilling Steels: are made from the high steel you can have ever come to expect from China supplier and factories. Our King-Long Brand King-Long Hollow Rock Drilling Steels have state-of-the-art treatment is unique- charming and phosphating- manufactured to close tolerances. Our rigorous quality controls at all our manufacturing units ensure that King-Long Brand


Brief Introduction

Hollow rock-drill steel used for rolling the hollow rock-drilling rod is a special alloy steel containing Fe base, W, C, Si, Mn, Cr and V. Its advantages are long service life and high quality.


Application

55SiMnMo: Hollow Drills Steels used for H19 H22 H25 Taper Drill Rods.

35SiMnMoV: D32 D38 Hollow Drill Steels.

Z708 sanbar 61/ 40SiMnCrNiMo: Round Drill Steels, D45 D51.

Sanbar 23/ 25CrNi3Mo Steels: Drill Rod with thread connection. surface hardness HRC58-62. Core hardness: HRC43-45.


Photos of KING-LONG Brand King-Long Hollow Rock Drilling Steels

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