3125-3518 Two-stage Diesel Skid-mounted Screw Air Compressor
Down-The-Hole Hammer for Water Well Rigs: Site-Ready Guide
Quick Specs Breakdown
|
Item |
LGZJ-31/25-35/18 |
|
Model |
LGZJ-31/25-35/18 |
|
Nominal Volume Flow, m³/min |
31 (35) |
|
Rated Discharge Pressure, MPa |
25 (18) |
|
Unit Weight, kg |
4500 |
|
Overall Dimension (L×W×H), mm |
3650×2000×2200 |
|
Tire Specification × Quantity |
N/A |
|
Manufacturer |
Yuchai |
|
Model |
YC6MK400-H300 |
|
Type |
Vertical, In-line, Water-cooled |
|
Intake Mode |
Turbocharged & Intercooled |
|
Bore × Stroke × Cylinder Qty |
120×145×6 |
|
Displacement, L |
9.839 |
|
Rated Speed, r/min |
1800 |
|
Unloading Speed, r/min |
1400 |
|
Rated Power, HP |
295 (400) |
|
Engine Oil Capacity, L |
28 |
|
Fuel Tank Capacity, L |
350 |
|
Electrical System Voltage, V |
24 |
|
Airend Model |
SKY11G220-B |
|
Compression Stage |
2 |
|
Air Supply Valve - Spec. & Qty. |
G2×1, G3/4×1 |
Build & Practical Perks
Rugged Alloy Body
Forged from thick nickel-chromium-molybdenum steel. It takes the constant high-frequency pounding without cracking or wearing thin at the stress points.
Simple Valveless Interior:
We kept the internal moving parts down to a minimum. Fewer tiny pieces inside mean less chance of something sticking or choking up when drilling in dusty, punishing conditions.
Balanced Air Cycle
Engineered to maximize stroke energy per cycle while keeping air consumption reasonable, reducing strain on your power source.Designed to squeeze maximum strike energy out of every stroke without demanding crazy air volumes, which goes easier on your deck engine.
On-Site Reality & Overview
When your crew is out in the field pushing a borehole through stubborn granite or alternating strata, the last thing you want is a sluggish tool holding up the rig. This DTH impactor is engineered for contractors who need steady, hard-hitting percussive force without spending half their shift troubleshooting maintenance issues.
By routing the air power straight down to the bit face, it skips the heavy energy drop you normally get from long string rods. Whether you are sinking a community water well or setting up an agricultural irrigation shaft, it keeps the penetration moving when the ground gets tight.
For deep drilling where pressure matters, pairing the string with a reliable high-output unit-such as the 31/25-35/18 Two-stage Diesel Skid-mounted Screw Air Compressor-delivers the heavy CFM and steady bar ratings required to blast out cuttings immediately, stopping your bit from binding up or chewing the same rock twice.
Frequently Asked Questions (FAQ)
Q1: Why does my hammer start losing punch when I get deep down the hole?
That usually happens because air volume and pressure drop off as the drill string gets longer. If your power source can't maintain output at depth, the impactor starves for air. Running a heavy rig setup like the 31/25-35/18 Two-stage Diesel Skid-mounted Screw Air Compressor keeps the pressure up so the piston keeps hitting hard at 200 meters down.
Q2: How can I tell if the internal piston is starting to go bad?
Listen to the rhythm of the rig and keep an eye on your gauge. If the sharp, steady hammering sound turns dull, or if your pressure bounces around for no apparent reason, trip the rods and pull it up. You will usually spot scoring along the barrel or loose tolerances inside.
Q3: Why are the carbide buttons on my bits chipping out so fast?
It usually boils down to poor hole cleaning. If rock chips stay at the bottom instead of riding the air column up, the bit slams right back into them on the next stroke. Check your airflow to make sure cuttings clear the face instantly.
Q4: Is it normal to see some oil spitting out of the exhaust pipe?
Yes, a light mist is actually a good sign. It tells you your line oiler is pumping enough rock drill oil to keep the internal cylinder walls and piston greased. If the exhaust looks bone dry, shut down and check your oil feed right away.
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