R25 Drill Bits for Drifting

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    2018-06-20 08:53

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Xiamen Good Mining and Drilling Equipment Co.,Ltd









03c4, 8/F, Bldg. D, Xiamen Internation Al Shipping Center, No. 97 Xiangyu Rd., China (Fujian) Pilot Free Trade Zone Xiamen Area,Fujian, China


http://www.gmd-eqpt.com/ http://gumaining.xianjuncheng.com/


R25 Drill Bits for Drifting

With the top quality of alloy steels and the best carbides, GMD produces all Top Hammer Drilling Tools b y hot press technology and multiple heat-treated process to extend the product life for maximum wear and performance in the toughest of drilling conditions.

Moreover, 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.

Our Drill Bits are 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 R25 Drill Bits shown as below:

Thread type: R25

Head diameters: 33mm ~ 76mm

Face designs; flat face,

Carbide shape: Dome, Ballistic , Semi-Ballistic,

Skirt designs: Standard

Application: Drifting and Tunneling


Special sizes may   be available upon request.

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

How to Choose the Right Skirt Type and Face Design

Normal Skirt Flat Face Drill Bit

Button Bit Face & Skirt Design  

Face & Skirt Design


Flat Face:                                                 For Drilling in medium to hard and abrasive rock

Drop Center Face:                                           For drilling in medium hard, maximum hole deviation control

Normal Skirt:                                               For drilling in very hard and very abrasive rock formation which is compact

RetracSkit:                                                 For drilling in loose and broken or fissured rock where it is difficult to retrac the drilling string due to the hole collapse

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

Remarks: Other specifications are available according to customers' requirements

Key Words:

R25 Drill Bits

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thread button bit,

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R25 Button Bit for for Drifting and Tunneling

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Button Drill Bit for for Drifting and Tunneling