R25 Drill Bits for Drifting

R25 Drill Bits are made by high quality alloy steel bar and tungsten carbides.It is widely used in Drifting and Tunneling....

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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.

N-R25 Button Bit-2

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

N--R25 Button Bit

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

Remarks: Other specifications are available according to customers' requirements

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