China 8" Series High Air Pressure DTH Bits

DOWN-THE-HOLE BITS

Roschen DTH drill bits are fitted with our cemented carbide inserts, which provide you with superior life and drilling productivity.
The Roschen DTH button bit designs are well known and extensively used around the world. Whatever conditions you're dealing with, our drill bits make the job easier. They are fitted with Roschen's proprietary cemented carbide buttons, which are designed to drill further. The drill bit bodies are made from precision hardened nickel molybdenum steel, with a compound curve shape for faster and smoother cutting and easier removal of cuttings.
The bits in the new range have an optimized head length with maximized steel support for the cemented carbide buttons, deep face grooves for excellent flushing and an aggressive cutting structure.
Advantages:
1. Proprietary Sandvik carbide ensures high quality and performance
2. Carbide grade options for long life in challenging applications
3. Face designs to maximize penetration rate and tool life
4. Optimized flushing designs to aid in cuttings removal and reduce wear
Product specifications:
For 8" hammer
DTH bits shankBit Dia.No.GaugeFrontWeightPart No.Air HolesButtonsButtons(Kg)mminch DHD380/COP841957 11/1639xφ189xφ1632DHD380-1952038"29xφ1810xφ1841DHD380-2032168 1/2"210xφ1812xφ1649DHD380-21625410"311xφ1817xφ1671DHD380-25430512"412xφ1829xφ1695DHD380-305SD81957 11/1639xφ189xφ1632SD8-1952038"39xφ189xφ1841SD8-2032168 1/2"210xφ1812xφ1649SD8-21625410"311xφ1817xφ1671SD8-25430512"412xφ1829xφ1695SD8-305QL801957 11/1639xφ189xφ1632QL80-1952038"39xφ189xφ1841QL80-2032168 1/2"210xφ1812xφ1649QL80-21625410"311xφ1817xφ1671QL80-25430512"412xφ1829xφ1695QL80-305Mission801957 11/1639xφ189xφ1635M80-1952038"39xφ189xφ1840M80-2032168 1/2"210xφ1812xφ1654M80-21625410"311xφ1817xφ1657M80-25430512"412xφ1829xφ1677M80-305
ROSCHEN RC hammer technical data:

ROSCHEN DTH Bits SpecificationsHammer SizeBits diameterShankROSCHEN CODEMetricInch1"64mm-70mm2 1/2"-2 3/4"BR1ROS 112"70mm-95mm2 3/4"-3 3/4"MACH20/BR2ROS 223"90mm-102mm3 1/2"-4"COP32/COP34/MACH303ROS 32M30/DHD3.5/BR3ROS 344"105mm-152mm4 1/8"-6"COP44/DHD340/MACH44ROS 42SD4/M40/QL40ROS 445"133mm-165mm5 1/4"-6 1/2"COP54/DHD350R/MACH50ROS 52SD5/M50/QL50/BR5ROS 546"152mm-254mm4 1/8"-10"COP64/DHD360/SD6ROS 62M60/QL60/Bulroc BR6ROS 648"203mm-330mm8"-13"COP84/DHD380/SD8ROS 82QL80/M80/M85ROS 8410"254mm-380mm10"-15"SD10ROS 100NUMA10012"305mm-508mm12"-20"DHD1120/SD12ROS 120NUMA120/NUMA125Notes: Metzke, Remet thread is available!Any special size of DTH bits will be available by requests.
Shank can be available:
1), Dia. 64mm-70mm shank Bulroc BR1
2), Dia. 70mm-95mm shank Halco MACH20, Bulroc BR2
3), Dia. 90mm-102mm shank COP32, COP34, Halco MACH303, M30, DHD3.5, Bulroc BR3
4), Dia. 105mm-152mm shank COP44, DHD340, Halco MACH44, SD4, M40, QL40, Bulroc BR4
5), Dia. 135mm-165mm shank COP54, DHD350R, COP54, Halco MACH50, SD5, M50, QL50, Bulroc BR5
6), Dia. 152mm-254mm shank COP64, DHD360, SD6, M60, QL60, Bulroc BR6
7), Dia. 203mm-330mm shank COP84, DHD380, SD8, QL80
8), Dia. 254mm-380mm shank SD10, Numa100
9), Dia. 305mm-508mm shank DHD1120, SD12, N120, N125
10), Dia. 405mm-864mm shank SD15, SD18
11), VKP80, VKP95, CIR90, CIR100, CIR110, CIR150, CIR200...
We can also provide related products DTH hammers, ODEX system, symmetrix systems, slide block drilling systems, etc and DTH drilling pipes for various thread API REG, API IF, BECO, etc
Product photos
Quality warranty:
Our products are made of high quality steel and all spares parts are inspected strictly before shipping. We have quickly responses for your complaint and suggestion.
Package:
Using ply-wooden cases and pallet for package to protect the products and avoid the damagement during transportation. Also we can customize package according to your special requests.
Production time:
Generally need 15-25 days
Transportation:
By air, By Express or By sea according to your requests.


FAQ
Q: Are you a manufacturer or trading company ?
A: We are a specialized manufacturer.
Q: How about the delivery terms ?
1. Payment: T/T, L/C, Western Union, Paypal, 30% deposit in advance and rest before delivery.
2. Min. order quantity: 1 piece.
3. Transportation: 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 promt technology support for all problems and questions. Besides, we accept goods return or replace for quality problem.
For more information, please contact:

ROSCHEN INC.
ROSCHEN GROUP LIMITED
ROSCHEN HOLDINGS LIMITED




Website: http://roschen.en.made-in-china.com ; http://roschen.en.made-in-china.com