Top Hammer Coupling Sleeves

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Top hammer coupling sleeves, connecting two or more drill rods and shank adapter in one line, are essential component of top hammer drilling tools. Like extension rods, they are responsible for transmitting percussive force to drill rocks. Maxdrill’s coupling sleeves made of high-quality material are resistant to tension, bending, twisting, friction and erosion.

Thread: R22, R25, R28, R32, R38, T38, T45, T51
Thread of crossover couplings: R32-R35, T38-R38, T38-T45, T45-T51 Length: 140 to 235mm Package: in plywood or in carton Productivity: 5000pcs/month Specification Thread R25

Top Hammer Drilling Tools for Drifting and Tunneling

Coupling	L (mm)	Dimensions D		Part no
Coupling	mm	mm	in	Part no
R25-R25	140	35	1 11/32	MXQ-R253414
Crossover coupling R25-R32	175	45	1 3/4	MXQ-R25R324517

Thread R28

Top Hammer Drilling Tools for Drifting and Tunneling

Coupling	L (mm)	Dimensions D		Part no
Coupling	L (mm)	mm	in	Part no
R28-R28	160	37	1 29/64	MXQ-R283716
Crossover coupling R28-R32	171	45	1 3/4	MXQ-R28R324517

Thread R32

Top Hammer Drilling Tools for Drifting and Tunneling

Coupling	Dimensions				Part no
Coupling	L（mm）	in	D（mm）	in	Part no
R32-R32	150	6	45	1 3/4	MXQ-R324515
Crossover coupling R32-R35	175	6 7/8	45	1 3/4	MXQ-R35R324517
Crossover coupling R28-R32	171	6 3/4	45	1 3/4	MXQ-R32R284517
Crossover coupling R32-R38	181	7 1/8	54	2 1/8	MXQ-R38R325418
Crossover coupling R32-T38	188	7 1/2	54	2 1/8	MXQ-T38R325418

Thread R35

Top Hammer Drilling Tools for Drifting and Tunneling

Coupling	Dimensions				Part no
Coupling	L mm	in	D mm	in	Part no
R35-R35	160	6 1/4	48	1 7/8	MXQ-R354816
Crossover coupling R32-R35	171	6 3/4	48	1 7/8	MXQ-R35R324817

Thread T38

Top Hammer Drilling Tools for Bench Drilling

Coupling	Dimensions L			Dimensions D		Part no
Coupling	mm	ft	in	mm	in	Part no
T38-T38	190	7	1/2	54	2 1/8	MXQ-T385419
Crossover coupling T38-R32	188	7	1/2	54	2 1/8	MXQ-T38R325418
Crossover coupling T38-T45	215	8	1/2	66	2 1/2	MXQ-T38T456621

Thread T45

Top Hammer Drilling Tools for Bench Drilling

Coupling	Dimensions					Part no
Coupling	L（mm）	ft	in	D（mm）	in
T45-T45	207	8	1/8	66	2 3/5	MXQ-T456620
Crossover coupling T45-T38	215	8	1/2	66	2 1/2	MXQ-T45T386621
Crossover coupling T45-T51	240	8	1/2	72	2 7/8	MXQ-T45T517224

Thread T51

Top Hammer Drilling Tools for Bench Drilling

Coupling	Dimensions L			Dimensions D		Part no
Coupling	mm	ft	in	mm	in	Part no
T51-T51	235	9	1/4	72	2 1/8	MXQ-T517223
T51-T51	235	9	1/4	77	3	MXQ-T517723
Crossover coupling T51-T45	240	9	1/2	72	2 7/8	MXQ-T51T457224

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