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| Brand Name : | MIROC | 
| Model Number : | Down The Hole Hammer | 
| Certification : | API | 
| Price : | negotiation | 
| Payment Terms : | T/T, L/C, D/A, D/P, Western Union, MoneyGram | 
| Supply Ability : | 20000pcs per month | 
| Delivery Time : | 10-25days | 
Down Hole Hammers Golden For Hard Rock Mining 4 Inch DTH Hammers Drilling
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.
Product name  | DTH Hammer  | 
Material  | Alloy Steel&Tungsten Carbide  | 
Use  | Underground Mining,Water well,Mining,Quarry etc.  | 
Color  | Green&Others  | 
Heat treatment  | Anneal  | 
Shank series  | DHD,COP,MISSION, SD, DHD, BR, QL, BR,CIR etc.  | 
Application  | heavy construction,Ore Drilling, mining, oil and gas, quarries  | 
Hole  | 60-305mm  | 
Size  | 2/3/4/5/6/7/8/9/10/12/14 inches  | 
Advantage  | High Performance and factory price  | 
• 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



                                 
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