ROSCHEN GROUP
| Payment Terms | T/T, L/C, Western Union |
| Supply Ability | 2000 Pieces per Month |
| Delivery Time | 5-10 working days for stock, 25-35 days for production |
| Packaging Details | Reinforced steel frame crate with foam-lined compartments and anti-corrosion VCI packaging |
| Guide Diameter Range | 80mm - 445mm |
| Reamed Diameter Range | 120mm - 660mm |
| Hammer Compatibility | DHD340, DHD350, DHD360, DHD380, NUMA100, NUMA120 |
| Material | Forged 42CrMo Alloy Steel Body |
| Insert Type | YG11 Tungsten Carbide Spherical Buttons |
| Face Design | Drop Center with Radial Flushing Grooves |
| Air Flushing | Multiple Front and Lateral Flushing Ports |
| Connection Type | API Thread or Custom Flange |
| Brand Name | ROSCHEN |
| Model Number | DTH-HO-80445 |
| Place of Origin | Guangdong, China |
| Certification | ISO 9001:2015 |
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Product Specification
| Payment Terms | T/T, L/C, Western Union | Supply Ability | 2000 Pieces per Month |
| Delivery Time | 5-10 working days for stock, 25-35 days for production | Packaging Details | Reinforced steel frame crate with foam-lined compartments and anti-corrosion VCI packaging |
| Guide Diameter Range | 80mm - 445mm | Reamed Diameter Range | 120mm - 660mm |
| Hammer Compatibility | DHD340, DHD350, DHD360, DHD380, NUMA100, NUMA120 | Material | Forged 42CrMo Alloy Steel Body |
| Insert Type | YG11 Tungsten Carbide Spherical Buttons | Face Design | Drop Center with Radial Flushing Grooves |
| Air Flushing | Multiple Front and Lateral Flushing Ports | Connection Type | API Thread or Custom Flange |
| Brand Name | ROSCHEN | Model Number | DTH-HO-80445 |
| Place of Origin | Guangdong, China | Certification | ISO 9001:2015 |
| High Light | DTH Hole Opener Reaming Bits ，80mm to 445mm Guide Diameter ，Tungsten Carbide Borehole Enlargement | ||
The ROSCHEN DTH Hole Opener Reaming Bits are purpose-built for enlarging existing pilot holes in hard rock formations. Designed for water conservancy dam foundations, bridge pile sockets, large-diameter water wells and geothermal borehole enlargement, these bits deliver efficient reaming with excellent hole quality and diameter control.
| Model | Guide Dia. | Reamed Dia. | Hammer | Weight |
|---|---|---|---|---|
| HO-80-120 | 80mm | 120mm | BR2 / DHD3.5 | 8 kg |
| HO-110-165 | 110mm | 165mm | DHD340 / COP44 | 18 kg |
| HO-140-220 | 140mm | 220mm | DHD350R / QL50 | 32 kg |
| HO-165-254 | 165mm | 254mm | DHD360 / COP64 | 48 kg |
| HO-203-311 | 203mm | 311mm | DHD380 / COP84 | 75 kg |
| HO-254-445 | 254mm | 445mm | NUMA100 | 120 kg |
| HO-305-508 | 305mm | 508mm | NUMA120 | 185 kg |
| HO-381-660 | 381mm | 660mm | NUMA125 | 260 kg |
For optimal results, drill the pilot hole 10-20% larger than the guide diameter to ensure smooth bit entry. Maintain air pressure at the upper end of the hammer operating range during reaming for maximum flushing efficiency. Recommended rotation speed: 20-35 RPM for diameters above 254mm to prevent excessive gauge button wear.
Custom Sizing Available: Need a reaming diameter that is not listed in our standard range? Our engineering team designs and manufactures custom hole openers to your exact pilot and target diameter requirements.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter,Seller
Year Established:
1921
Total Annual:
5000-2000000
Employee Number:
100~500
Ecer Certification：
Verified Supplier
ROSCHEN GROUP ROSCHEN Group has the world class advanced equipment like 12000 tons forging, metal processing plant, heat treatment workshop, numerical control plant, Advanced five-axis machining center, etc. professional technical and skilled team to ensure mining, mine... ROSCHEN GROUP ROSCHEN Group has the world class advanced equipment like 12000 tons forging, metal processing plant, heat treatment workshop, numerical control plant, Advanced five-axis machining center, etc. professional technical and skilled team to ensure mining, mine...
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