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Coupling Sleeve

Coupling Sleeve is a sleeve-shaped rock drilling component with internal threads for connecting shank adapter and drill rod, or drill rod and drill rod. We produce and provide three types of drill rod couplings – semi bridge couplings, full bridge couplings, and crossover couplings, which can meet the requirements of all applications.

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Product Details

Standard coupling sleeve, also known as semi bridge coupling sleeve, has a section of the bridge without a thread in the middle. The threaded part of the drill pipe cannot be screwed through the bridge part of the coupling, and the end of the thread can closely adhere to the casing bridge zone. Standard coupling sleeve is particularly suitable for high-torque drilling rigs. Most rope thread (R thread) and trapezoidal thread (T thread) coupling sleeves are with half-bridge type. The half-bridge type is by far the most widely used couplings.

Product	Coupling Sleeves
Other Names	Coupling sleeves,Drill bit adapter,Rock drill tools,Tophammer drill tools,Drifter drill tools,Coupling,Drill rod couplings,Drill coupling sleeves
Material	23CrNi3Mo
Application	Tunnelling, Mining, Quarrying, Ore Mining,Blasting and Infrastructure Construction,Facedrilling and Bolting, Bench Drilling, Production drilling, Long hole drilling, Drifting.
Thread	R25, R32, R35, R38, T38, T45, T51
Coupling Type	Full bridge coupling sleeve Reducing coupling sleeve(Ctossover couplings,Adapter couplings,Reduction couplings,Reducer coupling) Standard couplings(Semi bridge couplings)
Length	150mm~235mm
Diameter	33mm~72mm
Custom Design	Size,Color,Diameter,Thread,Length

Coupling Type
	R：R25,R28,R32,R38
	T:T38,T45,T51

Actual pictures of drill rods
	R25,R28,R32,R38
	T38,T45,T51

Full bridge coupling sleeve can completely eliminate the looseness of the coupling sleeves along with the threaded connection. It is mainly used in surface mining, with better disassembly characteristics, firmer connections, and almost no clamping situation.

Coupling Sleeves Process Flow

Coupling Sleeve