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| Place of Origin | GERMANY |
| Brand Name | ROSCHEN |
| Certification | ISO |
| Model Number | COP 44 |
COP 44 button bits
High Quality DTH hammers and button bits DHD340A,COP44 for Down The Hole Drilling
| ROSCHEN DTH Bits Specifications | ||||
| Hammer Size | Bits diameter | Shank | ROSCHEN CODE | |
| Metric | Inch | |||
| 1" | 64mm-70mm | 2 1/2"-2 3/4" | BR1 | ROS 11 |
| 2" | 70mm-95mm | 2 3/4"-3 3/4" | MACH20/BR2 | ROS 22 |
| 3" | 90mm-102mm | 3 1/2"-4" | COP32/COP34/MACH303 | ROS 32 |
| M30/DHD3.5/BR3 | ROS 34 | |||
| 4" | 105mm-152mm | 4 1/8"-6" | COP44/DHD340/MACH44 | ROS 42 |
| SD4/M40/QL40 | ROS 44 | |||
| 5" | 133mm-165mm | 5 1/4"-6 1/2" | COP54/DHD350R/MACH50 | ROS 52 |
| SD5/M50/QL50/BR5 | ROS 54 | |||
| 6" | 152mm-254mm | 4 1/8"-10" | COP64/DHD360/SD6 | ROS 62 |
| M60/QL60/Bulroc BR6 | ROS 64 | |||
| 8" | 203mm-330mm | 8"-13" | COP84/DHD380/SD8 | ROS 82 |
| QL80/M80/M85 | ROS 84 | |||
| 10" | 254mm-380mm | 10"-15" | SD10 | ROS 100 |
| NUMA100 | ||||
| 12" | 305mm-508mm | 12"-20" | DHD1120/SD12 | ROS 120 |
| NUMA120/NUMA125 | ||||
| Notes: | ||||
| Metzke, Remet thread is available! | ||||
| Any special size of DTH bits will be available by requests. | ||||
How to Selecting the right bit?
Roschen has a comprehensive range of DTH drill bits to match all conceivable applications.
Each bit is made from quality alloy steel, and has been precision machined to produce a perfect body, heat treated to the required hardness, given surface compression for fatigue resistance, and fitted with precision buttons manufactured in-house.
Five basic designs are available: Convex, Flat front, SpeedBit, Concave, and RocketBit. These are designed for specific applications for all rock types, hardness’s and conditions
Bit life and rate of penetration are the most important criteria in selecting the right bit for a particular application.
In most cases, the focus is on productivity, so the fast cuttings removal features of the SpeedBit and Convex/Ballistic designs are preferable, to ensure the buttons are cutting clean, with the minimum of recrushing.
In hard and abrasive formations, however, the flat front design offers best bit life, having strong gauge rows with large spherical buttons which are easy to regrind and maintain. The SpeedBit offers improved productivity with the same gauge as the Flat front, but with ballistic buttons in the front for faster penetration. An alternative is the Concave design with spherical buttons.
The RocketBit can be dressed with ballistic buttons for use in soft to medium hard formations where fractured rock can be expected, or can be supplied with spherical buttons for hard and abrasive formations.
Bits are manufactured to match all diameters of Secoroc hammers.
For more information, please contact:
ROSCHEN INC.
ROSCHEN GROUP LIMITED
ROSCHEN HOLDINGS LIMITED
Skype: ROSCHEN.TOOL , ROSCHEN_GROUP
WeChat: +86-137 6419 5009 ; +86-135 8585 5390
WhatsApp: +86-137 6419 5009 ; +86-135 8585 5390
Email: roschen@roschen.com ; roschen@roschen.net
Website: http://www.roschen.com ; http://www.roschen.net
http://www.roschen.cn ; http://www.roschendrill.com
http://www.roschenmining.com ; http://www.roschendrilling.com
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