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| Place of Origin: | Shangdong,China |
| Brand Name: | MIROC |
| Certification: | API |
| Model Number: | Down The Hole Hammer |
| Minimum Order Quantity: | 50 Pieces |
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| Price: | negotiation |
| Packaging Details: | Wooden Plate |
| Delivery Time: | 10-25days |
| Payment Terms: | T/T, L/C, D/A, D/P, Western Union, MoneyGram |
| Supply Ability: | 20000pcs per month |
| Material: | Tungsten Carbide And High Quality Carbon Steel | Color: | Golden |
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| Use: | Tunneling, Mining,Quarrying,Construction | Processing Type: | CNC Milling And Proprietary Heat Treatment Process |
| Type: | Down The Hole Hammer | Bit Diameter: | 130MM 152MM |
| Series: | DHD,SD,COP,QL | ||
| High Light: | down the hole drilling tools,down the hole hammer |
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Atlas Copco 4 Inch DTH Hammers Drilling Down Hole Hammers Golden For Hard Rock Mining
Describtion
In DTH hammers, the rock drilling bit is a continuation of the shank, which the rock drill piston strikes directly. Since the piston is in direct contact with the drill bit, little energy is lost. This gives DTH hammers a nearly constant penetration rate regardless of hole length.
• Small to medium size drilling diameters
• Works in low pressure range, capable of drilling shallow to medium hole lengths
Specification
| DTH hammer type | DHD35 | DHD45 | SD4 | QL4 | |
| Length(less bit) mm | 930mm | 1030 | 1084 | 1097 | |
| Weight(less bit) kg | 25kg | 39 | 40.5 | 41 | |
| External diameter mm | Φ82mm | Φ99 | Φ99 | Φ99 | |
| Bit shank | DHD3.5 | COP44 DHD340 | SD4 | QL40 | |
| Hole range(mm) | Φ90-110 | Φ110-135 | Φ110-135 | Φ110-135 | |
| Connection thread | API 2 3/8” Reg. | API 2 3/8"Reg | API 2 3/8"Reg | API 2 3/8"Reg | |
| Working pressure | 1.0-1.5Mpa | 1.0-2.5Mpa | 1.0-2.5Mpa | 1.0-2.5Mpa | |
| Impact rate at 1.5-1.7Mpa | 28Hz | 27Hz | 27Hz | 27Hz | |
| Recommended Rotation speed | 25-40r/min | 25-40r/min | 25-40r/min | 25-40r/min | |
| Air consumption | 1.0Mpa | 4.5m3/min | 6.0m3/min | 6.0m3/min | 6.0m3/min |
| 1.8Mpa | 9.0m3/min | 10.0m3/min | 10.0m3/min | 10.0m3/min | |
| 2.4Mpa | 15.0m3/min | 15.0m3/min | 15.0m3/min | ||
Advantages
| dth hammer: | dth hammer spare parts |
| More efficient energy transfer. | Valveless air distribution. More reliable. |
| Faster drilling speed, 15%-30% higher than others. | Simple design of the piston, long life |
| Lower air consumption and lower oil consumption. oil consumption is about 10% lower than others | Fewer internal parts, simple structure, longer life, less failure and easier to maintain because all the parts are heat treated. |
| Direct factory price | Easy to disassemble because the top sub, the drive chuck and the external cylinder are connected by multi-step thread. |
Applications
• Underground mining
• Quarry benching operations
• Water well drilling
Warranty of dth hammers:
In the early use if the dth hammer, rupture appears on parts such as external cylinder, piston and drive chuck ect. the broken parts can be compensated according to the situation.
Packaging & Shipping:
Internal package : By carton box with foam ,one pc dth hammer per carbox
External package: By wooden box, one pc dth hammer per wooden box.
Round-sealed package can prevent damaging during delivery.
Delivery ways of dth hammers:
Sample order can delivery by Air or International express, such as DHL, UPS, Fedex, ect.
Batch orders can delivery by Air , By truck or by Sea
We can choose most favorable delivery ways for our customers
Contact Person: Yingkai
Tel: +8618501231988
