Coupling information:
Coupling is indispensable parts and components as drilling tools accessories. It plays a role of connection under axial tension and compression, bending and torsion, contacts, friction stress corrosion effect. Therefore, a reasonable choice of steel for coupling, the optimization of the geometric structure and manufacturing process is very important. Coupling makes use of its threat connecting two or more branch rod on the same axis and transfers drill impact function, to achieve the purpose of drilling holes, and also plays the role of stress wave propagation vector and rod.
Coupling is indispensable parts and components as drilling tools accessories. It plays a role of connection under axial tension and compression, bending and torsion, contacts, friction stress corrosion effect. Therefore, a reasonable choice of steel for coupling, the optimization of the geometric structure and manufacturing process is very important. Coupling makes use of its threat connecting two or more branch rod on the same axis and transfers drill impact function, to achieve the purpose of drilling holes, and also plays the role of stress wave propagation vector and rod.
| CATEGORY | NAME | DIMENSIONS | WEIGHT | MATERIAL | PACKAGE |
| R25 | Coupling | Length 155 mm or 6 1/9 inch Diameter 44 mm or 1 3/4 inch Thread R32 | 1.0 kg | Steel Alloy | Wooden Box |
| Coupling | Length 150 mm or 6 inch Diameter 35 mm or 1 3/8 inch Thread R25 | 0.7 kg | Steel Alloy | Wooden Box | |
| Coupling | Length 160 mm or 6 2/7 inch Diameter 38 mm or 1 1/2 inch Thread R25 | 1.3 kg | Steel Alloy | Wooden Box | |
| Crossover Coupling | Length 150 mm or 6 inch Diameter 45 mm or 1 7/9 inch Thread R25-R32 | 1.1 kg | Steel Alloy | Wooden Box | |
| Crossover Coupling | Length 160 mm or 6 2/7 inch Diameter 45 mm or 1 7/9 inch Thread R25-R32 | 1.2 kg | Steel Alloy | Wooden Box | |
| Crossover Coupling | Length 160 mm or 6 2/7 inch Diameter 56 mm or 2 1/5 inch Thread R25-R38 | 2.5 kg | Steel Alloy | Wooden Box | |
| Crossover Coupling | Length 170 mm or 6 2/3 inch Diameter 56 mm or 2 1/5 inch Thread R25-R38 | 3.2 kg | Steel Alloy | Wooden Box | |
| R28 | Coupling | Length 150 mm or 6 inch Diameter 44 mm or 1 3/4 inch Thread R32 | 1.0 kg | Steel Alloy | Wooden Box |
| Coupling | Length 150 mm or 6 inch Diameter 40 mm or 1 4/7 inch Thread R28 | 0.9 kg | Steel Alloy | Wooden Box | |
| Coupling | Length 170 mm or 6 2/3 inch Diameter 55 mm or 2 1/6 inch Thread R38 | 2.0 kg | Steel Alloy | Wooden Box | |
| Crossover Coupling | Length 160 mm or 6 2/7 inch Diameter 45 mm or 1 7/9 inch Thread R28-R32 | 1.2 kg | Steel Alloy | Wooden Box | |
| Crossover Coupling | Length 160 mm or 6 2/7 inch Diameter 56 mm or 2 1/5 inch Thread R28-R32 | 2.5 kg | Steel Alloy | Wooden Box | |
| R32 | Coupling | Length 170 mm or 6 2/3 inch Diameter 55 mm or 2 1/6 inch Thread R38 | 1.8 kg | Steel Alloy | Wooden Box |
| Coupling | Length 190 mm or 7 1/2 inch Diameter 55 mm or 2 1/6 inch Thread R38 | 2.0 kg | Steel Alloy | Wooden Box | |
| Coupling | Length 150 mm or 6 inch Diameter 45 mm or 1 7/9 inch Thread R25-R32 | 1.1 kg | Steel Alloy | Wooden Box | |
| Crossover Coupling | Length 160 mm or 6 2/7 inch Diameter 45 mm or 1 7/9 inch Thread R25-R32 | 1.2 kg | Steel Alloy | Wooden Box | |
| Crossover Coupling | Length 160 mm or 6 2/7 inch Diameter 45 mm or 1 7/9 inch Thread R28-R32 | 1.2 kg | Steel Alloy | Wooden Box | |
| Crossover Coupling | Length 160 mm or 6 2/7 inch Diameter 55 mm or 2 1/6 inch Thread R28-R38 | 1.8 kg | Steel Alloy | Wooden Box | |
| Crossover Coupling | Length 170 mm or 6 2/3 inch Diameter 55 mm or 2 1/6 inch Thread R28-R38 | 2.0 kg | Steel Alloy | Wooden Box | |
| Crossover Coupling | Length 180 mm or 7 inch Diameter 55 mm or 2 1/6 inch Thread R28-R38 | 2.2 kg | Steel Alloy | Wooden Box | |
| Crossover Coupling | Length 210 mm or 8 1/4 inch Diameter 55 mm or 2 1/6 inch Thread R28-R38 | 2.8 kg | Steel Alloy | Wooden Box | |
| Crossover Coupling | Length 170 mm or 6 2/3 inch Diameter 56 mm or 2 1/5 inch Thread R28-R38 | 2.1 kg | Steel Alloy | Wooden Box | |
| Crossover Coupling | Length 180 mm or 7 inch Diameter 56 mm or 2 1/5 inch Thread R28-R38 | 2.2 kg | Steel Alloy | Wooden Box | |
| Crossover Coupling | Length 210 mm or 8 1/4 inch Diameter 56 mm or 2 1/5 inch Thread R28-R38 | 2.8 kg | Steel Alloy | Wooden Box | |
| Crossover Coupling | Length 190 mm or 7 1/2 inch Diameter 63 mm or 2 1/2 inch Thread R28-R45 | 3.2 kg | Steel Alloy | Wooden Box | |
| Coupling | Length 150 mm or 6 inch Diameter 44 mm or 1 3/4 inch Thread R32 | 1.0 kg | Steel Alloy | Wooden Box | |
| Coupling | Length 160 mm or 6 2/7 inch Diameter 44 mm or 1 3/4 inch Thread R32 | 1.1 kg | Steel Alloy | Wooden Box | |
| R38 | Coupling | Length 170 mm or 6 2/3 inch Diameter 55 mm or 2 1/6 inch Thread R38 | 1.9 kg | Steel Alloy | Wooden Box |
| Coupling | Length 150 mm or 7 1/2 inch Diameter 55 mm or 2 1/6 inch Thread R38 | 2.1 kg | Steel Alloy | Wooden Box | |
| T38 | Coupling | Length 190 mm or 7 1/2 inch Diameter 55 mm or 2 1/6 inch Thread T38 | 2.1 kg | Steel Alloy | Wooden Box |
| T45 | Coupling | Length 210 mm or 8 1/4 inch Diameter 63 mm or 2 1/2 inch Thread T45 | 3.0 kg | Steel Alloy | Wooden Box |
| Coupling | Length 210 mm or 8 1/4 inch Diameter 63 mm or 2 1/2 inch Thread T46 | 3.3 kg | Steel Alloy | Wooden Box | |
| T51 | Coupling | Length 225 mm or 8 6/7 inch Diameter 71 mm or 2 4/5 inch Thread T51 | 4.6 kg | Steel Alloy | Wooden Box |
| Coupling | Length 225 mm or 8 6/7 inch Diameter 76 mm or 3 inch Thread T51 | 4.8 kg | Steel Alloy | Wooden Box | |
| Coupling | Length 235 mm or 9 1/4 inch Diameter 72 mm or 2 5/6 inch Thread T51 | 4.7 kg | Steel Alloy | Wooden Box | |
| Coupling | Length 235 mm or 9 1/4 inch Diameter 77 mm or 3 inch Thread T51 | 4.9 kg | Steel Alloy | Wooden Box |