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Gold concave spherical 8 inch DTH drilling tools of DHD380 drill bit 219 mm

Gold concave spherical 8 inch DTH drilling tools of DHD380 drill bit 219 mm

Gold concave spherical  8 inch DTH drilling  tools of  DHD380  drill bit 219 mm

Product Details:

Place of Origin: CHANGSHA,HUNAN
Brand Name: TIANHE
Certification: IS09001
Model Number: DHD380-219

Payment & Shipping Terms:

Minimum Order Quantity: 1
Price: Negotiation
Packaging Details: dth bits are packed by Woodens outer side, and Cartons inner side.
Delivery Time: Shipped in 25 days after payment
Payment Terms: T/T
Supply Ability: 5000PCS/month
Detailed Product Description
Color: Glod Materail: Alloy Steel And Carbides
Processing Type: Forging Dth Bits Matched Hammer: DHD360 Hammer
Button Shape: Spherical, Ballistic, Semi-ballistic Bit Face Shape: Flat, Concave, Convex, Drop Center

1.15 years focus on rock drill bits manufacture.
2.High quality steel.
3.High abrasion resistant cemented carbide.
4.Advanced heat treatment technics.
5.Professional vacuum sintering technique.
6.Factory direct sales with competitive price.
7.Sufficient stock with full types.
8.Perfect after-sales service. Free replacement is provided if there is quality problem with our products.


Gold concave spherical  8 inch DTH drilling  tools of  DHD380  drill bit 219 mm







ressure Dth Bits


General Introduction


Bit Face Shape Selection:


1. Drop Center Bit


For high penetration rates in soft to medium hard and fissured rock formations. Low to medium air pressures. Maximum hole deviation control.


2. Concave Face


The all-around application bit face specifically for medium hard and homogeneous rock formations.


Good hole deviation control and good flushing capacity.


3. Convex Face


For high penetration rates in soft to medium-hard with low to medium air pressures. It is the most resistance to steel wash, and may reduce theload and wear on the gauge buttons, but poor hole deviation control.


4. Flat Face Bit


This kind of face shape is suitable for hard to very hard and abrasive rock formations in applications with high air pressures. Good penetration rates an resistance to steel wash.




Carbide Button Shape Selection:


1. Semi-Ballistic Buttons


2. Ballistic Button


3. Spherical Button


4. Two-step Button




Our Advantages:


We have advanced production equipment & talented researchers & technicians & rich experiences in R & D and production.
We using the best quality raw materials.
We adopting advanced production technology & strict testing procedure.
We passed ISO9001 quality management system certification.
We accept OEM manufacturing and produce on your design.


Raw Material



first class special alloy steel with high strength, heat resistance and wearable

The best tungsten carbides from China are commonly applied.
Tungsten carbide from European is also available.






1.Steel Carbide
2.12 years experience
3.Can match to the original bit shank
4.Atlas quality



Contact Details
Changsha Tianhe Drilling Tools and Machinery Co.,Ltd.

Contact Person: Ms.chen

Send your inquiry directly to us (0 / 3000)