Coupling Sleeves

cupling sleeves, other name is Coupling, when using rock drills with male shank adapters and a conventional drifter rod, a coupling is required to join the adapter to the rod, ensuring the ends touch for efficient energy transmission. Couplings are also used to connect several rods to each other in the same way. Couplings have a middle stop to prevent over-threading on to the drill rod. We can manufactures semi-bridge, full bridge Coupling sleeves for the percussive tools.

Semi-Bridge Coupling sleeve

Small non-threaded bridge in the center

Steel cannot thread past bridge area

Smaller diameter steel end portions fit together in the centre bridge area of the coupling

Semi-bridged couplings are most suited to high torque machines

Most rope and T threaded couplings are semi-bridged

Full-Bridge Coupling sleeve

Eliminates the potential for the coupling to creep along the threaded joints

Typically used in surface applications

Better uncoupling characteristics and tend to maintain tighter joints

Less chance of jamming

Best suited to machines equipped with independent rotation (i.e., S36IR rock drill)

MODEL	Thread	length	Diameter	Weight
		(mm)	(mm)	Appro* Kg
Coupling sleeve(Full bridge)
FB-R2214032	R22	140	32	0.5
FB-R2514037	R25	140	37	0.5
FB-R3215045	R32	150	45	1
FB-R3216045	R32	160	45	1.1
FB-R3216045	R32	160	45	1.1
FB-R3817055	R38	170	55	1.6
FB-R3818055	R38	180	55	1.6
FB-R3819055	R38	190	55	2.2
FB-T3819055	T38	190	55	1.8
FB-T4520766	T45	207	66	3.2
FB-T5123572	T51	235	72	4
FB-T5123577	T51	235	77	4.3