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8" DTH Hammer Mining DTH Bit , Alloy Steel High Strength Rock Drill Tools

8" DTH Hammer Mining DTH Bit , Alloy Steel High Strength Rock Drill Tools

8" DTH Hammer Mining DTH Bit , Alloy Steel High Strength Rock Drill Tools

Product Details:

Place of Origin: Hunan, China (Mainland)
Brand Name: Teamwhole
Certification: ISO9001
Model Number: Drill Bit

Payment & Shipping Terms:

Minimum Order Quantity: 1 Piece/Pieces
Price: Negotiation
Packaging Details: Inner package with cartons, outer package with wooden cases.
Delivery Time: In 15 days after receiving the advance payment
Payment Terms: L/C, T/T
Supply Ability: 50000 Piece/Pieces per Month
Detailed Product Description
Model Number: Mission80-254,QL80-254,SD8-254 Color: As Customer's Need
Usage: Mining Or Marble Quarry Or Water Well Drilling Hammer: 8" DTH Hammer
Flushing Hole: 2 Sample:: Avaliable

MISSION80-254mm rock drill bits widely used in blasting hole and water well drilling.


Matched hammer Dia. Bit diameter No.× Button Dia.(mm) Air holes



mm inch Gauge Front
8” 203 8 9*18 6*18+4*16 3 46



216 8 1/2 10*18 6*18+7*16 3 50
254 10 10*18 6*18+9*16 3 60
305 12 12*18 12*18+12+16 3 82



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




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.



Quality Warranty:

Our company response for any quality problem caused by material or machining defect.

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

Contact Person: Ms.chen

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