QL50 High Pressure Down The Hole Hammer Underground Mining Breakout
Bench DTH Hammer Drilling
Description
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
| 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 |
Applications
• Underground mining
• Quarry benching operations
• Water well drilling
Competitive Advantage
• Main hammer components manufactured from high grade steel and
processed using state-of-the-art CNC machinery and heat treatment
Specification
| Air distribution of 5"hammer without valve to utilize the bit with
blow tube |
| Product Structure | Part Description | Weight(Kg) | Part Number |
 | 1 | Top Sub | 13.7 | QL50-01 |
| 2 | “O” Ring of Top Sub | 0.015 | QL50-02 |
| 3 | Breakout Ring | 0.15 | QL50-03 |
| 4 | Check Valve | 1 | QL50-04 |
| 5 | Spring | 0.1 | QL50-05 |
| 6 | Compression Buffer | 0.1 | QL50-06 |
| 7 | Air Distributor | 3.5 | QL50-07 |
| 8 | Internal Cylinder | 4.2 | QL50-08 |
| 9 | Piston | 19 | QL50-09 |
| 10 | External Cylinder | 24.6 | QL50-10 |
| 11 | Guided Sleeve | 0.9 | QL50-11 |
| 12 | "O"Ring of Stop Ring | 0.01 | QL50-12 |
| 13 | Stop Ring | 0.4 | QL50-13 |
| 14 | Drive Chuck | 4.6 | QL50-14 |
| 15 | Drill Bit | | QL50-15 |
Products features: Valveless air distribution hammer, more reliableGood sealability,
no water and cuttings entering into hammer in waterexists drilling. Application: Available for al working conditions, highperformance in overburden
and water well drilling project. |
Technical Parameters |
Length(Without bit) | Weigth(Without bit) | External diameter | Bit Shank | Hole range | Connection Thread (top sub-drill pipe) |
1156mm | 73.0kg | φ125mm | COP54 QL50 | φ135mm-φ152mm | API2 3/8" Reg API3 1/2" Reg |
Working Pressure | Impact rate at17bar (reference) | Speed recommended | Pull force recommended | Reference Air consumption(m³/min) |
14Bar | 17.2Bar | 20.7Bar | 24Bar |
10-25Bar | 26Hz | 30-60rpm | 9.5kN | 12 | 15.4 | 18.7 | 22.3 |
Technical Parameters Of Bits Assorted |
Head Shape | Number of head shape | Head Diameter (mm) | Part No. | No. x Button diameter (mm) | Button angle | No. of Flushing holes Dia.(mm) | Weight (Kg) |
| 
| 
| Gauge Buttons | Front Buttons |
Flat Face | Convex Face | Concave Face |
1 | φ140 | QL50-140CV7 | 7xφ18 | 3xφ14 | 4xφ15 | / | 38° | 2xφ20 | 15.1 |
1 | 2 | 3 | 2 | φ140 | QL50-140FF8 | 8xφ16 | 8xφ14 | / | / | 38° | 2xφ20 | 15.3 |
| 
| 
| 3 | φ146 | QL50-146FF8 | 8xφ18 | 8xφ15 | / | / | 38° | 2xφ20 | 15.9 |
4 | φ146 | QL50-146CC8 | 8xφ18 | 4xφ15 | / | 3xφ14 | 38° | 2xφ20 | 15.8 |
5 | φ152 | QL50-152FF8 | 8xφ18 | 8xφ15 | / | / | 38° | 2xφ20 | 16.4 |
4 | 5 | 6 | 6 | φ152 | QL50-152CC8 | 8xφ18 | 4xφ16 | / | 4xφ14 | 38° | 2xφ20 | 16.2 |
Q: How about the delivery terms?
A: Payment:T/T, L/C, Western Union, 30% deposit in advance +70%
balance before shipment.
Q. Min. order
A: Quantity: 1 piece.
Q.Transportation
A: By DHL/TNT/Fedex express, air, sea, train.
Q: How about discount?
A: Price is based on products and order quantity.
Q: Do you accept sample order?
A: Yes sure, please contact us for details.
Q: How about your after-sales service?
A: As a manufacturer, we offer promote technology support for all
problems and questions. Besides, we accept goods return or
replace for quality problem.
