Three parts diamond core drill bits include the crown bit, steel tube and thread connector parts. It's the laser welded technology core bits. The three-parts diamond core drill has the common features, fast drilling, long drilling life, and high efficiency. The outstanding feature is that you can drill whatever depth that you want, just by adding extension tubes. Diameters range covers 1 inch to 20 inches.
Three-parts diamond core drill bit specification
Diameter: 1 inch to 20 inches
Segments height: 10mm
Adaptor: 1 1/4''UNC
Features of Diamond Core Drill Bits
1) Laser welded technology.
2) Segment welding strength guaranteed in drilling works.
3) High quality 20# seamless steel barrel
4) Good control in Dynamic balance during rotation
5) Sharp and fast drilling speed with stable long lifespan
6) Different Quality level to choose
Applications: drilling concrete, reinforced concrete, asphalt-over concrete with superior efficiency.
Specification of Laser Welded Diamond Core Drill Bits
| Item No. | Diameter | Crown Bit Length | Steel Tube Length | Adapter Length | Total Length | Barrel Thickness |
| CTCD02510 | 1" | 50mm | 300mm | 100mm | 420mm | 2.5mm |
| CTCD03210 | 1-1/4" | 55mm | 300mm | 100mm | 420mm | 2.5mm |
| CTCD03810 | 1-1/2" | 65mm | 300mm | 100mm | 420mm | 2.5mm |
| CTCD05110 | 2" | 65mm | 300mm | 100mm | 420mm | 2.5mm |
| CTCD06210 | 2-1/2" | 70mm | 300mm | 100mm | 420mm | 2.5mm |
| CTCD07510 | 3" | 70mm | 300mm | 100mm | 420mm | 2.5mm |
| CTCD08810 | 3-1/2" | 70mm | 300mm | 100mm | 420mm | 2.5mm |
| CTCD10810 | 4" | 100mm | 300mm | 100mm | 450mm | 2.5mm |
| CTCD12610 | 5" | 120mm | 300mm | 100mm | 450mm | 2.5mm |
| CTCD15810 | 6" | 120mm | 300mm | 100mm | 450mm | 3.0mm |
| CTCD17810 | 7" | 120mm | 300mm | 100mm | 450mm | 3.0mm |
| CTCD20310 | 8" | 120mm | 300mm | 100mm | 450mm | 4.0mm |
| CTCD22810 | 9" | 120mm | 300mm | 100mm | 450mm | 4.0mm |
| CTCD25210 | 10" | 120mm | 300mm | 100mm | 450mm | 4.0mm |
| CTCD30010 | 12" | 120mm | 300mm | 100mm | 450mm | 4.0mm |
| CTCD35010 | 14" | 120mm | 300mm | 100mm | 450mm | 4.0mm |
| CTCD40010 | 16" | 120mm | 300mm | 100mm | 450mm | 4.0mm |
| CTCD45010 | 18" | 120mm | 300mm | 100mm | 450mm | 4.0mm |
| CTCD50010 | 20" | 120mm | 300mm | 100mm | 450mm | 4.0mm |
Manufacturing Process and Quality Control
Dr. Fritsch Automatic Laser Welding Process
Core Drill Barrel Inspection
Corediam Introduction
Corediam Tools Co., Ltd., as a high-tech enterprise, concentrates on researching & developing manufacturing and marketing diamond tools industry. We have the most extensive, innovative and powerful range of diamond tools for construction, stone and DIY markets. Corediam strives to be the leading professional supplier in the world through technology innovation.
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