Coupling

Coupling is used for connecting shank adapter and extension drill rod together, or for connecting two extension rod together.
Besides normal equal couplings, we also offer reducing couplings that are able for changing thread type and size.
The couplings we offer can be applied for our top hammer drilling system, suitable for drilling duties in tunneling, construction, mining, quarrying, etc.

Features Premium steel as material, precision CNC for manufacturing, accuracy and reliability assured; High transmission efficiency grants high drilling efficiency for the drilling system. Parameters Thread type: R25, R28, R32, R38, T38, T45, T51 Diameter: 35mm, 40mm, 45mm, 55mm, 63mm, 66mm, 72mm, 76mm Length: 150mm, 155mm, 170mm, 180mm , 180mm, 190mm, 210mm , 235mm Coupling type:
A: Half coupling, full coupling
B: Equal coupling, reducing coupling

Coupling sleeve
Thread		Diameter		Length		Part Number	Weight
A	B	mm	inch	mm	inch		Kg
R25	R32	45	13/4	170	657/64	CPR25R32L170D45	1.1
R28	R32	45	13/4	170	657/64	CPR28R32L170D45	0.96
R32	R38	55	25/32	180	71/8	CPR32R38L180D55	1.86
R32	T38	55	25/32	180	71/8	CPR32T38L180D55	2.1
R38	T38	55	25/32	190	733/64	CPR38T38L190D55	1.86
R25		35	119/50	150	59/10	CPR25L150D35	0.72
R28		40	129/50	155	61/10	CPR28L155D40	0.95
R32		45	13/4	170	657/64	CPR32L170D45	1.32
R38		55	25/32	170	657/64	CPR38L170D55	1.71
T38		55	25/32	190	733/64	CPT38L190D55	1.96
T45		63	215/32	210	817/64	CPT45L210D63	3.12
T45		66	219/32	210	817/64	CPT45L210D66	3.51
T51		72	27/8	235	91/4	CPT51L235D72	5.22
T51		76	3	235	91/4	CPT51L235D76	5.75