Drive sub – DTH threaded adapter – Chuck adapter
تماس و استعلام قیمتThe drive sub is a standard and key component in the DTH (Down The Hole) drilling system, installed between the drill rod and the DTH hammer, responsible for transmitting torque and impact force.
This product is known in the market by various names: drive sub, DTH threaded adapter, chuck adapter, or even power head.
Key Features
Upper threaded connection to the drill rod or DTH hammer
Lower part for fitting into the hammer shaft or connecting to the retaining section
Side groove for a locking pin or spline to transmit torque
Material: hardened alloy steel (4140 or 4145 HT)
Suitable for all types of light, medium, and heavy DTH hammers
Thread and Application Table
| Upper Thread (Rod) | Lower Thread (Hammer) | DTH Hammer Size | Application |
|---|---|---|---|
| 2⅜” API REG | 2⅜” API REG | 3″ تا 3½” | اتصال مستقیم راد و چکش سبک |
| 2⅜” API REG | 3½” API REG | 4″ تا 5″ | Conversion from light rod to medium hammer |
| 3½” API REG | 3½” API REG | 5″ تا 6″ | Direct connection of rod and heavy hammer |
| 3½” API REG | 4½” API REG | 6″ تا 8″ | Conversion from medium rod to large hammer |
⚠️ Note: Each adapter has one male (Pin) end and one female (Box) end. Threads are usually right-hand.
Applications of the Drive Sub
Mining, tunneling, and construction projects
Allows the use of rods and hammers with different threads without replacing the entire assembly
Technical Specifications
Common Sizes: 2⅜”, 3½”, 4½”, 6⅝”
Compatible with various hammers: COP, DHD, QL, Mission, SD
Technical Notes: steel material, thread type, compatible hammers
Complete Thread and Adapter Table for Professionals
Anonymous –
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