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KEY FEATURES DETAILS LITERATURE
KEY FEATURES, ALL TERRAIN AIR HAMMER
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- Compatible with the Ditch Witch JT4020 All Terrain and JT100 All Terrain directional drills, the All Terrain Air Hammer quickly and cost-effectively cuts through the hardest rock.
- Advanced technology enables the All Terrain Air Hammer to continuously drill as it is being steered, an exclusive All Terrain drill feature that results in superior productivity; other air hammers require stopping the drill rotation to change directions.
DETAILS, ALL TERRAIN AIR HAMMER
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- All Terrain Air Hammer is designed to penetrate exceptionally hard rock of 20,000 to 35,000 psi and harder, where rotary units and mud motors lose effectiveness; Air Hammer is over 50 percent more productive in hard rock than rotary drilling.
- Peak performance is achieved when used with the Rockmaster Air Housing (included in All Terrain Air Hammer kit), which features larger air ports that help increase production.
- Both the JT4020 All Terrain and JT100 All Terrain have standard cruise control that maintains thrust and rotation settings, which reduces operator effort and increases productivity.
- Unlike other air hammers on the market, the All Terrain Air Hammer requires no oiler or drilling mud, which reduces overall cost of production.
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- Minimal cost of spoils cleanup: used properly, the All Terrain Air Hammer leaves only dry cuttings and a relatively small amount of foam used downhole to remove cuttings.
- A very low flow rate—4 gpm (15 L/min)—means low fluid costs; a patented hydro cyclone features an impeller (rotor blade) that reduces that amount of fluid in the Air Hammer and on the jobsite.
- All Terrain Air Hammer is lubricated by water and able to work in even
the most sensitive environmental areas.
- Complete kit includes the All Terrain Air Hammer; convex bit, bit jaw, and jaw assembly; two slide pins; Rockmaster Air Housing; and a fluid pump and air adapter kit.
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LITERATURE, ALL TERRAIN AIR HAMMER
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ENGLISH
SPECIFICATIONS, ALL TERRAIN AIR HAMMER
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GENERAL
Standard drill pipe connection
Shank style
Outside diameter
Length without bit shoulder to shoulder
Length with bit extended
Length with bit retracted
Weight without bit
Backhead across flats
Bit size*
Recommended air pressure
Make-up torque
Recommended fluid flow
Air Consumption (at 350 psi/24.1 bar)
Blows per minute
*Other bits are available. |
U.S.
3.5 in API Reg Pin
QL 60
5.4 in
44.6 in
49.5 in
48.1 in
200 lb
2x4 AF
6.5 in
350 psi
6000 ft·lb
970 ft3/min
1770 |
METRIC
138.2 mm
1.13 m
1.26 m
1.22 m
90.9 kg
152.4 mm
24.1 bar
8124 N·m
3-4 gpm/L
458 L/s |
Jobsite safety cannot be overemphasized. You're working on and around heavy equipment that you need to understand and respect. Below is a "Safety Matters" topic relevant to this Ditch Witch product. For other "Safety Matters" topics, plus safety videos and other important facts about jobsite safety, please visit our Ditch Witch Safe page.
Locating safety. Remember that you can verify locates with Ditch Witch electronic pipe and cable locators, and a sure way to verify the location of buried utilities is to expose the lines with a Ditch Witch vacuum excavator.
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 Safety Matters is intended to promote discussions of safety issues among underground construction professionals. TOPIC #2: ELECTRICAL STRIKE—USING A HORIZONTAL DIRECTIONAL DRILL Potential HazardsPrecautions- Call 811 to have underground utilities located prior to drilling. Also, contact other utilities that don't subscribe to 811.
- Verify locates using a reliable electronic locator.
- Any time you drill, the electric strike system must be properly set up, tested, and used.
- Note: The electric strike system does not detect proximity to an electric line. If the electrical strike alarm sounds, assume a strike has occurred.
- Wear electrically insulated gloves/boots.
- If crossing a known electric line, expose the line and watch the crossing while drilling and backreaming.
- Use a tracker to locate the drill string only when drilling has stopped.
What to DoIf a strike occurs: - If you are on the drilling unit, stay where you are
- Notify others to stay away.
- Have someone call electric company.
- Pullback the drill string to try to break contact with the line.
- Press the electric strike system reset/status button.
- Do not leave the unit until the electric company says it is safe to do so or until you have no lights or alarms on the electric strike system after pushing status button several times at least one minute apart.
- If you are off of the drilling unit, do not move or touch the unit or anything connected to the unit. If you must move to get help, take very small steps to shuffle away from drilling unit.
Information/Facts- Voltage is similar to pressure in a water hose.
- Current is similar to flow in a water hose.
- Electrical current kills by:
- Intense heat causing physical burns
- Stopping the heart and brain
- Tightening your muscles, causing you to lose muscle control and not be able to let go
- It takes very little current to cause physical harm:
- 20mA makes it difficult to breathe
- 20mA can paralyze muscles
- 50-200mA causes your heart to beat out of control
- 200mA makes your heart stop completely
- Some strikes produce smoke and can cause the ground to explode around the strike; however, some strikes give no indication at all.
- Electricity takes the path of least resistance. The steel drill string on a horizontal directional drill provides very little resistance, so electricity can easily flow from the drill head back to the drilling machine.
- Part of the flow of electricity will pass into the ground around the strike, so the ground may be electricuted.
- If all parts of your body are at the same voltage, current can't flow. Take, for example, a squirrel on an electric line. The voltage in its body is the same as long as it doesn't step off the wire or touch something that leads to ground. When it steps off, one part of its body is at one voltage and another part is at a different voltage. This voltage difference allows current to flow. This is known as "step potential."
- An electric strike system on a drill machine consists of:
- Voltage stake — this is to be located away from the machine. It detects the voltage difference between the ground stake and the drilling machine.
- Current transformer — detects current flowing through the drill string.
- Reset/status button — used to recheck the status if the alarm sounds.
- Self-test — the self-test should be done every time the machine is used.
- Alarm — if the alarm sounds, assume a strike has occurred.
- Strobe light — provides a visual alert that a strike has occurred.
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