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Drill Rods

Product
Name
Rod
Image
Type
L
mm
inch
H
mm
inch
Thread
Weight
(KG)
Product
Code
MF T38 Rod
Extension
915
1220
1525
1830
3
4
5
6
38
38
38
38
11/2
11/2
11/2
11/2
T38
T38
T38
T38
8.3
10.9
13.3
15.8
290-3809-7676
290-3812-7676
290-3815-7676
290-3818-7676
T38 Extension Rod
Extension
1220
1525
1830
4
5
6
38
38
38
11/2
11/2
11/2
T38
T38
T38
10.0
12.4
14.9
280-3812-7676
280-3815-7676
280-3818-7676
T38 Guide Tube | T38 Guide Rod
Extension
1220
1525
1830
4
5
6
56
56
56
12/8
12/8
12/8
T38
T38
T38
12.6
14.0
17.4
200-5612-7676
200-5615-7676
200-5618-7676

Drill Taper Rods

Product
Name
Rod
Image
Type
L
mm
inch
H
mm
inch
Thread
Taper
Weight
(KG)
Product
Code
H25 Drilling Taper Rod
Extension
1100
2200
2600
2800
3'3 3/8"
7'2 5/8"
8'6 3/8"
9'2 1/4"
25
25
25
25
1
1
1
1
R25
R32
R25
R25
7 °
3.7
8.7
10.1
10.9
246-2510-5207
246-2522-5407
246-2526-5407
246-2528-5407

Integral Rods

Product
Name
Rod
Image
L
mm
inch
TL
mm
inch
H
mm
inch
Weight
(KG)
Product
Code
H19x108mm Intergral Rod
260
260
310
340
10 1/4"
10 1/4"
1 1/4"
1'1 3/8"
200
200
250
280
7 7/
87 7/
89 7/
8
20
22
22
22
25/32
7/8
7/8
7/8
0.8
0.8
0.8
0.9
221-2026-9820
221-2026-9822
221-2531-9822
221-2834-9820

Taper Rods (Light Duty)

Product
Name
Rod
Image
L
mm
inch
Taper
Weight
(KG)
Product
Code
H22-108mm Taper Rod
500
800
1000
1200
1500
1800
2000
2200
2500
3000
3500
4000
4500
5000
6000
7000
8000
15/8"
2'7 1/2"
3'3 3/8"
3'11 1/4"
4'11"
5'10 7/8"
6'6 3/4"
7'2 5/8"
8'2 3/8"
9'10 1/8"
11'5 3/4"
13'1 1/2"
14'9 1/8"
16'4 5/8"
19'8 1/4"
22'11 5/8"
26'3"
7 °
1.5
2.4
3.0
3.6
4.5
5.5
6.1
6.7
7.6
9.1
10.6
12.1
13.6
15.1
18.2
21.2
24.2
236-2205-8197
236-2208-8197
236-2210-8197
236-2212-8197
236-2215-8197
236-2218-8197
236-2220-8197
236-2222-8197
236-2225-8197
236-2230-8197
236-2235-8197
236-2240-8197
236-2245-8197
236-2250-8197
236-2260-8197
236-2270-8197
236-2280-8197
Why choose us

Meet RockHound Drill Rod Features

Mirror-Smooth Inner Bore

Unlike standard rods, our Mandrel Rolling process eliminates internal scratches, stopping fatigue cracks before they start.

Premium ZK22CrNi3Mo Alloy

High-nickel, high-moly steel provides the ultimate balance of surface hardness and high-impact toughness.

The RockHound Promise: Engineering Over Shortcuts

Manufacturing a rock drilling rod is a balance of metallurgy and mechanical science. From the precision of our CNC machining to our full-length carburization, every step is designed to ensure that when your rig is running, our rods are performing. Stop paying for downtime. Choose RockHound for reliability in every meter.

20-Hour "Deep" Carburization

We bake our rods for 20 hours (double the industry standard). Result? A thicker wear-resistant skin and a core that won’t snap.

Internal Corrosion Shield

Full-length wax impregnation protects the flushing hole from rust and erosion, extending shelf life and performance.

Drill Rods Manufacturing Process

Step 01
Raw Material Processing
Mandrel Rolling Advantage
RockHound utilizes ZK22CrNi3Mo alloy steel. Mandrel Rolling ensures a smoother inner surface, significantly reducing stress concentration compared to hot piercing.
Ensures mirror-smooth inner walls & precision ovality for high-frequency percussion.
Step 02
Material Cutting Stage
Precision cutting with length tolerances controlled within strict ranges.
ElementCSiMnCrNiMo
Measured0.220.300.731.343.050.25
Status: Qualified
Step 03
Raw Material Straightening
Eliminates bending stress to ensure concentricity during subsequent machining and reduces dynamic balance errors.
Step 04
Threading & Forming
Friction Welding / Forging
Friction welding for standard joints; 250-ton forging upsetting for heavy-duty applications to ensure thread strength exceeds the rod body.
Step 05
Appearance Treatment
CNC Machining of inner and outer rolled edges (≤ 52mm rods) to prevent erosion and wear during slag discharge.
Step 06
20-Hour Heat Treatment
The "Soul" of the Drill Rod
Our premium rods undergo a 20-hour deep carburization cycle (Industry standard is only 8-12h).
MetricStandardRockHound
Case Depth1.5mm3.0mm+
GradientSteepGentle
Service Life100%160%
Precision chemistry creates a wear-resistant skin with a tough core.
Step 07
Fully Auto Straightening
Advanced calibration of lengths. Strategic partnership with Shougang Guiyang for future 6m straightening capabilities in 2026.
Step 08
Surface Treatment
Shot Peening: Generates residual compressive stress and removes oxide scale to enhance fatigue resistance.
Step 09
Anti-Corrosion Treatment
Wax & Oil Impregnation
Full-shaft wax impregnation (≤4.5m) for superior internal bore protection and rust prevention.
Step 10
Packaging & Warehousing
Framed or custom wooden crate packaging. Laser marking and steel stamping for professional traceability.
How it work

What is a Rock Drill Rod?

A rock drill rod is a high-strength ZK23CrNi3Mo steel component designed to transmit impact energy and rotational torque from the rock drill (drifter) to the drill bit.

In the demanding world of mining, tunneling, and quarrying, the rock drill rod is the unsung hero that bridges the gap between the power of the rock drill and the impact of the bit.

Choosing the right rod isn’t just about compatibility; it’s about maximizing energy transfer and minimizing downtime.

  • Energy Transfer: The piston of the rock drill strikes the shank (or the rod itself), sending a shockwave through the steel to the bit.

  • Flushing: Most rods feature a hollow center (flushing hole) to allow water or air to pass through, clearing rock chips from the hole to prevent jamming.

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