2 inch BR2 dth hammer, Bulroc BR2 shank DTH hammer
Created on：2020-09-07 19:59
2 inch BR2 dth hammer, Bulroc BR2 shank DTH hammer
OS20-BR Hammer shank: BR2
Material: high quality alloy steel
Air pressure/air consumption: 7-20 bar /PSI 102-290
Regular DTH drill bits diamter: 76mm, 80mm, 90mm, 95mm, 100mm
ROSCHEN ROS20-BR2 DTH hammer is proven by thousands times testing and using in many countries, regions driling sites with varies rock conditions.
Usually, it is used in quarry drilling at lower pressure, and air consume is less.
Features:
1. Valved air distribution hammer
2. Simplicity of design, ease of service and lower air consumption
3. Lightweight of hammer
4. Fast penetration speed
| Technical parameters of ROS20-BR2 DTH Hammer | |
| Moddel | ROS20-BR DTH Low Pressure Hammer |
| Bit Shank | BR 2 |
| Top sub thread | RD50 Box |
| Length (less bit) | 867mm(34.2 inch) |
| External diameter | 63 mm (2.49 inch) |
| Weight (less bit) | 15 kgs (324 lbs) |
| Impact rate at 17 bar | 35 Hz |
| Hole Range | 70 - 95 mm (2.76 ~ 3.7 inch) |
| Working pressure | 7 - 20 bar (102 - 290 PSI) |
| Speed recommended | 30 - 70 rpm |
| Pull force recommended | 5 KN |
| DTH Bits | ||||||
| Diameter | Button configuration Qty x Dia. | Face type | Weight (kg) | Part number | ||
| Metric | Inch | Gauge button | Front button | |||
| 76 mm | 3" | Ø12mm * 6 | Ø10mm * 5 | Flat face | 2.3 | ROS20-BR-76FF |
| 76 mm | 3" | Ø13mm * 6 | Ø10mm * 2, Ø11mm * 2 | Convex face | 2.4 | ROS20-BR-76CV |
| 80 mm | 3 1/8" | Ø13mm * 6 | Ø10mm * 2, Ø11mm * 3 | Convex face | 2.5 | ROS20-BR-80CV |
| 90 mm | 3 1/2" | Ø13mm * 6 | Ø11mm * 2, Ø14mm * 4 | Convex face | 2.6 | ROS20-BR-90CV |
| 90 mm | 3 1/2" | Ø13mm * 6 | Ø10mm * 6 | Flat face | 2.7 | ROS20-BR-90FF |
| 95 mm | 3 3/4" | Ø12mm * 8 | Ø12mm * 2, Ø12mm * 2 | Concave face | 2.8 | ROS20-BR-99CC |
| Valved Low Pressure Hammers | |||||
| Model | BR1 | BR2 | BR3 | BR33 | BR4 |
| Shank Type | BR1 | BR2 | BR3 | BR33 | BR4 |
| Outside Diameter (inches) | 2 | 2.44 | 3.07 | 3.225 | 3.75 |
| Hammer Length (inches) | 27.9 | 33 | 30.2 | 30.2 | 35.9 |
| Hammer Weight (pounds) | 17.6 | 28.6 | 48.5 | 55 | 76 |
| Backhead Connection* | RD40 Box | RD40 Box | 2 3⁄8 API Reg Pin | 2 3⁄8 API Reg Pin | 2 3⁄8 API Reg Pin |
| Air Consumption (cfm) | 100 psi: 17.79 | 100 psi: 26.65 | 100 psi: 38.33 | 100 psi: 58.86 | 100 psi: 67.04 |
| 150 psi: 32.69 | 150 psi: 48.96 | 150 psi: 70.42 | 150 psi: 98.95 | 150 psi: 123.15 | |
| 200 psi: 50.32 | 200 psi: 75.38 | 200 psi: 108.41 | 200 psi: 152.34 | 200 psi: 189.61 | |
| 250 psi: 70.33 | 250 psi: 105.35 | 250 psi: 151.51 | 250 psi: 212.9 | 250 psi: 264.98 | |
*Other backhead thread connections are available.
