Coupling

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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