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| Brand Name : | MIROC |
| Model Number : | T38-190mm |
| Certification : | ISO |
| Supply Ability : | 3000 |
| Delivery Time : | 20-30 |
Product Description
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. We can
manufactures semi-bridge, full bridge coupling sleeves for the
percussive tools.
Rock drilling tools: Adapter Coupling, Cross-over Adapter Coupling,
coupling sleeves
Used when changing from one thread type, or size, to another and
are typically required only in special circumstances
Thread sizes: R22, R25, R28, R32, R35, R38, T38, T45, T51;
Two catagories: Standard coupling sleeves, adapter(crossover)
coupling sleeves;
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.
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 |




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