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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.
Top Hammer Drilling Tools for Drifting and Tunneling
| Coupling | L (mm) | Dimensions D | Part no | |
| mm | mm | in | ||
R25-R25 
|
140 | 35 | 1 11/32 | MXQ-R253414 |
Crossover coupling R25-R32 
|
175 | 45 | 1 3/4 | MXQ-R25R324517 |
Top Hammer Drilling Tools for Drifting and Tunneling
| Coupling | L (mm) | Dimensions D | Part no | |
| mm | in | |||
R28-R28  |
160 | 37 | 1 29/64 | MXQ-R283716 |
Crossover coupling R28-R32  |
171 | 45 | 1 3/4 | MXQ-R28R324517 |
Top Hammer Drilling Tools for Drifting and Tunneling
| Coupling | Dimensions | Part no | |||
| L（mm） | in | D（mm） | in | ||
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 |
Top Hammer Drilling Tools for Drifting and Tunneling
| Coupling | Dimensions | Part no | |||
| L mm | in | D mm | in | ||
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 |
Top Hammer Drilling Tools for Bench Drilling
| Coupling | Dimensions L | Dimensions D | Part no | |||
| mm | ft | in | mm | in | ||
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 |
Top Hammer Drilling Tools for Bench Drilling
| Coupling | Dimensions | Part no | ||||
| 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 |
Top Hammer Drilling Tools for Bench Drilling
| Coupling | Dimensions L | Dimensions D | Part no | |||
| mm | ft | in | mm | in | ||
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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