Threaded Rod Coupling Sleeve Rock Drill Tools Crossover Coupling For Mining
Our coupling sleeves are available with both half-bridge and full-bridge types, as well as adapter couplings.
Semi-bridge coupling, by far is the most popular, has a small non-threaded bridge in the centre. The drill rod cannot thread past the centre of the couplings, and the smaller diameter rods portions butt together in the centre bridge area of the coupling. Semi-bridge couplings are most suited to high torque machines. Most rope (R) and Trapezoidal (T) threaded couplings are semi-bridged.
Full bridge coupling has a great advantage that it positively eliminates the potential for the coupling to creep along the threaded joints. These couplings, are typically used in a Trapezoidal thread, in surface drilling application, have better uncoupling characteristics and tend to maintain tighter joints. Full-bridge couplings have less chance of jamming and are best suited to machines equipped with independent rotation.
Adapter couplings are used when changing from one thread type, or size, to another and are typically required only in special circumstances.
Specification
Coupling Sleeve | ||||||
Length | Diameter | Thread | Weight | Part Number | ||
mm | inch | mm | inch | kg | ||
R25 Coupling Sleeve | ||||||
150 | 6 | 35 | 1 3/8 | R25 | 0.7 | 4148300429 |
155 | 6 1/9 | 44 | 1 3/4 | R25 | 1.0 | 4148300430 |
160 | 6 2/7 | 38 | 1 1/2 | R25 | 1.3 | 4148300431 |
R28 Coupling Sleeve | ||||||
150 | 6 | 40 | 1 4/7 | R28 | 0.9 | 4148300483 |
170 | 6 2/3 | 55 | 2 1/6 | R28 | 2.0 | 4148300484 |
R32 Coupling Sleeve | ||||||
150 | 6 | 44 | 1 3/4 | R32 | 1.0 | 4148300646 |
160 | 6 2/7 | 44 | 1 3/4 | R32 | 1.1 | 4148300647 |
R38 Coupling Sleeve | ||||||
170 | 6 2/3 | 55 | 2 1/6 | R38 | 1.9 | 4148300703 |
190 | 7 1/2 | 55 | 2 1/6 | R38 | 2.1 | 4148300704 |
T38 Coupling Sleeve | ||||||
190 | 7 1/2 | 55 | 2 1/6 | T38 | 2.1 | 4148300803 |
T45 Coupling Sleeve | ||||||
210 | 8 1/4 | 63 | 2 1/2 | T45 | 3.0 | 4148300881 |
210 | 8 1/4 | 66 | 2 3/5 | T45 | 3.3 | 4148300882 |
T51 Coupling Sleeve | ||||||
225 | 8 6/7 | 71 | 2 4/5 | T51 | 4.6 | 4148300961 |
225 | 8 6/7 | 76 | 3 | T51 | 4.8 | 4148300962 |
235 | 9 1/4 | 72 | 2 5/6 | T51 | 4.7 | 4148300963 |
235 | 9 1/4 | 77 | 3 | T51 | 4.9 | 4148300964 |
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