Top Hammer Drill Tools R32-T38 Threaded Rod Coupling Sleeve With
190mm Length
Coupling sleeve
Coupling 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.
Coupling are important accessories for tubing and casing pipes.
couplings are used to connect two joints of tubing or coupling
accessories together. Couplings are short length of heavy well pipe
with the same threads on each end. Threaded coupling sleeves are
made of high quality of alloy steels and CNC machining guarantee
our reliable and consistent quality control of coupling
sleeves.Both semi-bridge and full-bridge coupling sleeves are
manufactured by us in different sizes as below:
Thread sizes: R22, R25, R28, R32, R35, R38, T38, T45, T51.
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
Coupling sleeve specification
| Coupling sleeve |
| Thread | Diameter | Length | Weight |
| A | B | mm | inch | mm | inch | Kg |
| R25 | R32 | 45 | 1 7/9 | 170 | 6 2/3 | 1.10 |
| R28 | R32 | 45 | 1 7/9 | 170 | 6 2/3 | 0.96 |
| R32 | R38 | 55 | 2 1/6 | 180 | 7 | 1.86 |
| R32 | T38 | 55 | 2 1/6 | 180 | 7 | 2.10 |
| R38 | T38 | 55 | 2 1/6 | 190 | 7 1/2 | 1.86 |
| R25 | 35 | 1 3/8 | 150 | 6 | 0.72 |
| R28 | 40 | 1 4/7 | 155 | 6 1/9 | 0.95 |
| R32 | 45 | 1 7/9 | 170 | 6 2/3 | 1.32 |
| R38 | 55 | 2 1/6 | 170 | 6 2/3 | 1.71 |
| T38 | 55 | 2 1/6 | 190 | 7 1/2 | 1.96 |
| T45 | 63 | 2 1/2 | 210 | 8 1/4 | 3.12 |
| T45 | 66 | 2 1/2 | 210 | 8 1/4 | 3.51 |
| T51 | 72 | 2 5/6 | 235 | 9 1/4 | 5.22 |
| T51 | 76 | 3 | 235 | 9 1/4 | 5.75 |
About us
MIROC® Rock Drilling Tools are Rock Drilling Tools Brand by KSQ
Tecnologies (Beijing) Co. Ltd.
KSQ Technologies (Beijing) Co. Ltd. provides exceptional technical
know-how in development, production, and application. The company
has adopted advanced manufacturing processes to ensure high quality
steels and tungsten carbide inserts for its rock drilling
accessories. Its personnel understand clients’ drilling needs, and
have the service skills to recommend the right drilling tools for
the job. Its experienced product developers can also create custom
tools. Furthermore, the company’s development team introduces
innovative products each year – tools that are rigorously tested in
the field and proven
to perform beyond industry expectations.
MIROC® Rock Drilling and Ground Support Tools include:
Integral Rods
Plug Hole Rods
Tapered Drilling Tools
Extension Drilling Tools
Drifting and Tunneling Tools
Reaming Tools
Shank Rods
Shank Adapters (Striking Bars)
Down-the-hole (DTH) Bits
Down-the-hole (DTH) Hammers
