Coupling Sleeves

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Top hammer drilling

Coupling Sleeves: Unyielding Connections for Optimal Performance

Our coupling sleeves, expertly crafted from high-quality steel and subjected to specialized processing and heat treatment techniques, guarantee exceptional strength and longevity. Designed to forge a tight and reliable connection between drill rods and drill bits, our coupling sleeves prevent detachment or breakage during drilling operations.

Starockdrill offers three types of coupling sleeves

Semi-Bridge Coupling Sleeves: Widely applicable for high-torque drilling machines, these sleeves feature threaded ends to securely connect two drill rods.
Full-Bridge Coupling Sleeves: Eliminating any concerns of loose connections, these sleeves provide superior stability and are easily detachable during open-pit mining operations, ensuring a robust connection.
Reducer Coupling Sleeves: Ideal for transitioning between different thread types and sizes of drill rods, these sleeves accommodate diverse drilling requirements.

Specifications

Thread	Length (mm)	Diameter (mm)
R22	140	32
R25	150	35
R25	160	38
R28	150	40
R28	160	42
R32	150	44
R32	160	45
R38	170	55
	180	55
	190	55
T38	180	55
T38	190	55
T45	207	63
T45	210	66
T51	225	71
T51	235	72

Note: other specifications can be customized.

Features

International standard threads, precisely machined for perfect compatibility, ensuring a secure and reliable connection.
Employing special carburization processes, our coupling sleeves exhibit exceptional wear resistance, extending their service life.
Customizable length and thread specifications, catering to unique customer requirements.
Ensuring safety and stability, our coupling sleeves deliver reliable performance, guaranteeing operational efficiency and safety during construction.