R25 Tunneling Thread Button Bit

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    2018-08-04 10:42

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Xiamen Good Mining and Drilling Equipment Co.,Ltd
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03c4, 8/F, Bldg. D, Xiamen Internation Al Shipping Center, No. 97 Xiangyu Rd., China (Fujian) Pilot Free Trade Zone Xiamen Area,Fujian, China

Product details

GMD rock tools for top hammer drilling are designed to transmit intensive impact energy into the rock with the least possible loss of energy. The result is good rock breakage, high penetration rates and high productivity. This, together with optimal hole quality, great reliability and long service life, gives the best possible blasting results, outstanding drill-steel economy and low total cost.

Our products are produced from premium steels and fitted with tips with high quality tungsten carbide. It could ensure maximum service life and impact strength.

Suitable for powerful percussive drills and top hammers with high speed drifter, such as Atlas Copco 282 rocket boomer, Atlas Copco 352 rocket boomer jumbo, Atlas Copco D7roc, Furukawa HCR 1200, Tamrock, and Ingesoll Rand ECM660.

A comprehensive range of various button bits shown as below:

Thread type: R25

Head diameters: 33mm ~ 76mm

Face designs; flat face,

Material: 45CrNiMoV or 42CrMo

Carbide shape: Dome, Ballistic , Semi-Ballistic,

Skirt designs: Standard

Application: Drifting and Tunneling

R25 Threaded Drill Bits for Drifting and Tunneling
Name Code No. Thread Diameter Gauge Front Skirt Design Weight
Threaded Button Bits Q7-33R25 R25 33 5*7mm 2*7mm Standard 0.33 KGS
Q7-35R25 R25 35 5*8mm 2*7mm Standard 0.44 KGS
Q7-38R25 R25 38 5*9mm 2*7mm Standard 0.56 KGS
Q7-41R25 R25 41 5*8mm 2*9mm Standard 0.61 KGS
Q7-43R25 R25 43 5*9.5mm 2*8mm Standard 0.63 KGS
Q7-45R25 R25 45 5*10mm 2*9mm Standard 0.78 KGS
Q7-48R25 R25 48 5*11mm 2*8mm Standard 0.82 KGS
Q7-51R25 R25 51 5*11mm 2*10mm Standard 0.88 KGS
Q9-45R25 R25 45 6*9mm 3*8mm Standard 0.78 KGS
Q9-48R25 R25 48 6*9mm 3*9mm Standard 0.89 KGS
Q9-51R25 R25 51 6*10mm 3*9.5mm Standard 1.0 KGS
Q9-57R25 R25 57 6*10mm 3*10mm Standard 1.31 KGS
Threaded Cross Bits CB-35-R25 R25 35 8*14mm
Standard 0.38 KGS
CB-38-R25 R25 38 8*14mm
Standard 0.48 KGS
CB-41-R25 R25 41 8*14mm
Standard 0.59 KGS
CB-45-R25 R25 45 8*14mm
Standard 0.79 KGS
CB-48-R25 R25 48 9.5*19mm
Standard 0.92 KGS
CB-51-R25 R25 51 9.5*19mm
Standard 0.97 KGS
CB-57-R25 R25 57 9.5*19mm
Standard 1.09 KGS


Special sizes may   be available upon request.

How to order?
Button Bit: Diameter + Thread + Skirt Shape + Face Design + Insert Configuration

Packing Picture:  

Choosing The Right Carbide

The larger the volume of the Carbide, the more aggressive the Bit. The more aggressive Carbides assist movement of the chips away from the face as there is more room for airflow on the face of the Bit. These more aggressive Bits help to break out larger chips, which increases the penetration rate. The greater volume of Carbide can lead to longer Bit life.

Button Shape



Spherical Carbides for use in medium to hard rock, with fractured or seamy applications.


Semi-ballistic shaped, more aggressive than the Spherical Carbides, for soft to medium consistent rock.


Bullet shaped, very aggressive fast penetration in soft to medium consistent rock.

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