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Forging 140mm QL50 DTH Drill Bits Ore Mining Hole Drill Bit For Mining

Forging 140mm QL50 DTH Drill Bits Ore Mining Hole Drill Bit For Mining

  • Forging 140mm QL50 DTH Drill Bits Ore Mining Hole Drill Bit For Mining
  • Forging 140mm QL50 DTH Drill Bits Ore Mining Hole Drill Bit For Mining
Forging 140mm QL50 DTH Drill Bits Ore Mining Hole Drill Bit For Mining
Product Details:
Place of Origin: China
Brand Name: MIROC
Certification: SGS certified, ISO
Model Number: DTH Bits
Payment & Shipping Terms:
Minimum Order Quantity: negotiation
Price: negotiation
Packaging Details: wooden box
Delivery Time: 15-20days
Payment Terms: T/T, L/C, D/A, D/P, Western Union
Supply Ability: 20000pcs per month
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Detailed Product Description
Product Name: 140mm QL50 DTH Drill Bits Diameter: 140mm
Shank Type: QL50 Material: Carbide
Processing Type: Forging Usage: Drifting Tunneling Bench Drilling
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dth hammer bits


dth button bits

140mm QL50 DTH hammer Drill bit ore mining hole drill bit for mining


DTH Button Bits

DTH drilling is a percussion system driving a piston inside hammer body with up and down motion by compressed air and transmitting an intensive percussion energy to the bit to enable the drilling by crushing the rock. Drilling method by DTH hammer exerts high drilling performance especially for drilling hard rock and contributes for shortening work schedule. Hence, this method is widely utilized for foundation work, landslide prevention work, quarrying services, marine civil work, etc. 


KSQ makes and supplies the finest and most efficient Down-the-Hole (DTH) hammers and bits for the mining, construction and water well industries. Sansung DTH hammers transmit intensive impact energy with low energy loss. This results in good rock breakage, high penetration rates and high productivity. The equipment is designed to give optimal hole quality, reliability, and long service life, as well as the best blasting results and low total operation cost.


​We can design and manufacture the personalized products to meet your specical apllication, such as changing the tungsten carbide insert profile (spherical, ballistic, etc.), face profile (flat face, concave, convex, etc.), and flushing holes.





• Underground mining

• Down the hole rock drilling


Competitive Advantage


• High grade tungsten carbide inserts
• Bit bodies manufactured from high grade steel and processed using state-of-the-art CNC machinery and heat treatment



QL50 High Air Pressure DTH Bit Specification:

QL50 Spherical button/Concave face
130 5 1/8 4×14,3×14 8×16 2 14 4148301331
133 5 1/4 4×14,3×14 8×16 2 14 4148301332
140 5 1/2 4×14,4×14 8×16 2 15 4148301333
146 5 3/4 4×14,4×14 8×16 2 15.8 4148301334
152 6 4×16,4×16 8×18 2 18 4148301335
QL50 Ballistic button/Convex face
130 4 3/8 3×14,4×14 9×16 3 14 4148301336
133 4 1/2 3×14,4×14 9×16 3 14 4148301337
140 4 3/4 3×16,4×16 9×16 3 15 4148301338
146 5 3×16,4×16 9×16 3 15.8 4148301339
152 5 1/8 3×16,5×16 9×18 3 18 4148301340
QL50 Spherical button/Flat face
130 4 3/8 7×14 8×16 2 14 4148301341
133 4 1/2 7×14 8×16 2 14 4148301342
140 4 3/4 7×14 7×18 2 15 4148301343
140 5 8×14 9×16 3 15 4148301344
146 5 1/8 8×14 9×16 3 15.8 4148301345
152 5 1/4 8×16 9×18 3 18 4148301346


Different face style makes DTH bits suitable for various rock conditions.

Flat face: This is an universal design, especially for hard and abrasive rock formation. So typically, flat face with hemi-spherical buttons design is the most popular choice.


Convex face: A classic design for soft to medium hard rock formation which is not so abrasive. This design have very excellent penetration rate but poor in hole deviation if rocks are hard.


Concave face: Medium hard to hard rock formations which is less abrasive and fractured. Especially for deep hole drilling, excellent control over hole deviation.


DGR face: A special design for hard or very hard rock conditions, double gauge row buttons provide very excellent ware-resistance and very longer life time. It is usually used for some bigger diameter DTH bits.
Besides, we are manufacturing the DTH bits with various shanks so they can be compatible with different DTH hammers.



About US


KSQ Technologies (Beijing) Co. Ltd. is a diversified enterprise based in Beijing, China, offering a portfolio of products that help contribute to a better bottom line and increase workplace safety for the construction and mining industries.


KSQ Technologies (Beijing) Co. Ltd. has significant experience and know-how in the supply of materials, components, finished goods, specially designed/engineered equipment, and services from China. The company caters to medium to large scale clients who are doing projects and capital expansion, as well as to firms who require support with consumable products, maintenance, and repair operations. Our operations are based on the unique expertise of our people and knowledge with customer processes.


MIROC® Rock Drilling and Ground Support Tools include:

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


Forging 140mm QL50 DTH Drill Bits Ore Mining Hole Drill Bit For Mining 0

Contact Details
KSQ Technologies (Beijing) Co. Ltd

Contact Person: Mr. Yingkai Zhang

Tel: +86 18501231988

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