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Underground Mining Threaded Drill Rod S135 Diameter 3 1/2" DTH Drilling Tools

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Underground Mining Threaded Drill Rod S135 Diameter 3 1/2" DTH Drilling Tools

Brand Name : MIROC KSQ
Model Number : DTH Drill Pipe
Certification : ISO9001
Place of Origin : China
MOQ : 1 Piece
Price : Negotiable
Payment Terms : L/C, T/T, Western Union
Supply Ability : 20000 PCS Per Month
Delivery Time : 10 - 20 days
Packaging Details : Carton / Wooden Box or Customized
Machine Type : Drilling Tool
Product Name : DTH Drill Pipe
Thread : IF
Diameter : 3 1/2"
Length : 31,5 feet
Grade : S135
Processing Type : Forging
Weight : 220 kg
Color : Black, Grey or Customized
Material : Tungsten Carbide, High Strength Alloy Steel
Application : Underground mining, Quarry benching operations, Water well drilling
Advantages : High Wear Resistance, High Efficiency, High Quality Materials
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DTH Drilling Tools - Drill Pipe

Thread IF; Grade S135; Diameter 3 1/2"


DTH Drill pipe

Diameter: 3 1/2" (88,9mm)

Length: 9144mm (30 feet)

Thread: IF

Material: Tungsten Carbide, High Strength Alloy Steel

Weight: 220 kg per piece

Real Photo from the Factory (1):


In DTH drilling, the rock drilling bit is a continuation of the shank, which the rock drill piston strikes directly. Since the piston is in direct contact with the drill bit, little energy is lost. This gives DTH drilling a nearly constant penetration rate regardless of hole length.

Drill Pipe Features:

- Friction welded (Friction welding gives much stronger joints compared with electrode welding due to less risk of impure joints).

Our Advantages:

High Wear Resistance, High Efficiency, High Quality Materials, Low Prices, Good Service

Available any variety of lengths, diameters, wall thicknesses, and thread configurations, all our products are CUSTOMIZED.


- Underground mining
- Quarry benching operations
- Water well drilling

Package: Carton or Wooden Box; we also can follow customers' requirements.
Delivery time: around 10-20 days.

Sample order: NO MOQ for trial order

Real Photo from the Factory (2):


Our Service:
Compared with the oversea brands, our advantages are bellowing:
1. Our products can match over 95% against the original products
2. Price are competitive against the famous brands and best quality against the small factory
3. Our factory has been specialized in manufacturing drilling tools and spare parts for about 10 years.
4. We have advanced technology and equipment.
5. Our technician has more than 20 year’s professional working experience.
6. Rock drilling tools are exported throughout the world. Main market: South America, South Africa, Russia, Middle East and etc.
Now we are looking forward to make the market bigger and stronger with your join!


Q: What methods of payment are accepted?
A: We work with T/T, L/C, AliBaba, Paypal, West Union, Money Gram.
Q: Can we select the color of the products?
A: Yes, sure. Either you can choose the color among our standards or we can make it exactly according to your requirements.
Q: Can we use our company's logo on your products?
A: Yes, we can be OEM Company for you.
Q: What's your delivery time?
A: It depends on the quantity of your order, but normally the manufacture time is around 10-20 days. And the delivery time depends on the way of shipment (by air/by sea). We always advice you the best way of delivery use the individual approach according to your requirements.
Q: What about the shipment?
A: It's based on the product type and the order quantity. We use carton or wooden box (also we can follow your reqirements) ans we can send it to you by Air or by Sea, either send the products to your Chinese agent.
Q: How to control the quality?
A: We always carefully check all the details before shipment, we are always online with you if any questions. Your satisfaction with our products is one of our main aims. We can send all the prooves if any questions.
Q: Do you offer sample order?
A: Yes, we welcome you to order some samples for testing our quality. For cheching the quality it's need only 1-2 samples to understand our really high quality and be sure in our production.
Q: Do you have after-sale service and warranty period?
A: Yes, of course. We offer our clients after-sale maintenance, technical support and warranty. If any questions or problems, please contact us asap and we will reply you within 24 hours.
Q: Do you have any social network to follow your updates?
A: Sure, we have:
Instagram: ksq_tech;
Twitter: @KsqCo - KSQ Technologies (Beijing) Co. Ltd.
Facebook: KSQ Technologies
YouTube: You can find it the search box as
KSQ Technologies Beijing Co. Ltd. And here is the link on our Youtube channel:

MIROC® Production:
Integral Rods

Plug Hole Rods
Tapered Drilling Tools
Extension Drilling Tools
Drifting and Tunneling Tools
Reaming Tools
Shank Rods
Coupling Sleeves
Shank Adapters (Striking Bars)
Down-the-hole (DTH) Bits
Down-the-hole (DTH) Hammers

Company Information:

DTH Drill Bit 127mm DHD340 Bit Shank With Spherical and Ballistic Carbide Have Foot Valve

The MIROC® Rock Drilling Tools product line by KSQ Technologies (Beijing) Co.Ltd. is the result of years of advanced engineering, precision manufacturing, and dedication to the use of high-quality materials.
MIROC® Rock Drilling Tools are used by many drilling professionals related to mining, construction, tunneling, and quarrying projects around the globe.

Our products are made from high quality alloy steel and advanced heat-treatment, our bits are ensured extreme protection against wear and fatigue. They're also available in four different bit-head designs - Convex, Flat, Concave and Drop center face, and four different inserts-Spherical,Ballistic,Semi-ballistic,Two-Step to tackle any challenge and rock formations.

KSQ Technologies (Beijing) Co. Ltd.

Elisa (Елизавета)

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