R38 170 - 190mm Underground Mining Drill Threaded Coupling
Description
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.
Standard coupling using R38 thread system
Threaded coupling sleeve 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;
Two catagories: Standard coupling sleeves, adapter(crossover)
coupling sleeves;
• R38 thread system
• Widely used in drifting and tunneling
Color: Green or Based on Customer requirements
Material: Tungsten carbide and high strength alloy steel
Processing: CNC milling and proprietary heat treatment process
Type: R38 Standard Coupling
Applications
• Underground Mining
• Tunneling
Competitive Advantage
High strength chromium-molybdenum steel with high fatigue strength
and excellent wear resistance
Specification
| Part Number | Product Code and Brief Description | Length (mm) | Length (inch) | Diameter (mm) | Diameter (inch) | Thread | Weight (kg) |
| 4148300703 | CS-R38-170, R38 Standard Coupling
| 170 | 6 2/3 | 55 | 2 1/6 | R38 | 1.9 |
| 4148300704 | CS-R38-190, R38 Standard Coupling | 190 | 7 1/2 | 55 | 2 1/6 | R38 | 2.1 |
