HJG(BD DRILL) High Air Pressure Deep Hole Rotary Pneumatic Drilling DTH hammer without foot valve for COP MISSION DHD QL SD.
The optimum range of hole size for blast hole drilling with DTH is 90 mm to 254 mm (3 ½”–10″). Smaller blast holes are generally drilled using tophammer, and larger holes generally use rotary machines.
In other applications, like foundation drilling, DTH hammers can be used with single bit in hole sizes up to . 750 mm (30″). With multiple hammer units CD (Cluster drills) drill holes up to 70″ or 1778 mm.
As a rule of thumb, the smallest hole diameter a DTH hammer can drill is its nominal size. A 4 inch hammer will drill a 4 inch (102 mm) hole. The limiting factor is the outside diameter of the hammer, because, as hole diameter reduces, airflow is restricted. Maximum hole size for production drilling is the nominal hammer size plus 1 inch, so for a 4 inch hammer the maximum hole size is 5 inch (127–130 mm).
Choosing the right hammer is largely determined by hole size and type of rock formation. Ideally, the size of the hammer should match the required hole dimension as closely as possible, leaving just enough space for cuttings to evacuate the hole.
Packing Details : Plywood box and bubble film or as your request
Delivery Details : 25-30 days.
QL50 DTH HAMMER&152MM Concave Bits TCI Spherical -Help the mines reduce the drill meter cost from USD1.56 down to 0.48USD, saving 800K USD for the mine budgets ,comparing with Atlas Copco and Sandvik.
HK6-M(Mission 60) DTH HAMMER&165MM Concave Flat Face Bits TCI Spherical -Help the mines reduce the consumables cost down to 50% less,saving huge budget for the mine budgets ,comparing with Sandvik.Hammer drilling meters 13000M, drill bit:3500M.Beat down Sandvik.
HK6-M(Mission 60) DTH HAMMER&165MM Concave Flat Face Bits TCI Spherical -Help the mines reduce the consumables cost down to 60% less,saving huge budget for the mine budgets ,comparing with Sandvik and Atlas Copco.BD DRILL won the 2018 forecast.
A: We are factory.
Area of our factory: over 50,000SQM;
Numbers of our employees: Over 700;
Numbers of our equipment &facilities: Over 1000 sets
Numbers of DTH Hammer production yearly: Over 20,000 sets
Numbers of Drill bits production yearly: over 250,000 pcs
Annual turnover in USD: 60 Million
Market share(China): 40%-50%
Export market volume: 30 Million USD
A: Generally it is 25 working days.
A: Yes, we will charged the sample but will return it back to you in your bulk order.
A: Usually we accept T/T and L/C, but it is negotiable.