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Coupling Sleeves

Coupling Sleeves for Top Hammer Drilling

Type: Standard / Full Bridge / Crossover
Thread: R25 · R28 · R32 · R35 · T38 · T45 · T51
Application: Top Hammer Drilling
Material: Alloy Steel
Features: High Strength ·Long Service Life · Reliable Connection

Parameters

Coupling Sleeves for Top Hammer Drilling

Product Detail

General introduction

Qstone Coupling Sleeves connect shank adapters and drill rods in top hammer drilling systems, ensuring reliable connection and efficient transfer of impact energy.

Precision-machined threads ensure stable connection, efficient energy transfer, and reliable drilling performance.

Product Range

Qstone supplies coupling sleeves for common R and T threads:

Type	Structure	Description	Main Advantage	Application
Standard Coupling		Same thread both ends, simple structure	Universal & economical	General drilling
Full Bridge Coupling		Internal bridge structure	Higher strength & stability	Deep hole, heavy-duty drilling
Crossover Coupling		Different threads on both ends	Connect different systems	Thread conversion

Application

Coupling sleeves are widely used in:

Underground Mining	Tunneling	Quarrying	Construction
Drifting and production drilling	Blast hole drilling and excavation	Bench drilling and rock fragmentation	Foundation and infrastructure drilling

Technical parameters

Thread System	Standard Couplings	Crossover Couplings	Diameter (mm)	Length (mm)
R25	R25–R25	R25–R32	35–45	140–175
R28	R28–R28	R28–R32	37–45	160–171
R32	R32–R32	R32–R35, R32–R38, R32–T38	45–54	150–188
R35	R35–R35	R35–R32	48	160–171
T38	T38–T38	T38–R32, T38–T45	54–66	188–215
T45	T45–T45	T45–T38, T45–T51	66–72	207–240
T51	T51–T51	T51–T45	72–77	235–240

Key Features

High-strength alloy steel

Precision-machined threads

Efficient energy transfer

High wear resistance

Reliable drill-string connection

Multiple coupling options

Related Products


Shank Adapter	Top Hammer Drill Rods	Drill Bit

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Contact Qstone for coupling sleeve solutions matching your drilling system.

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