Core Bit Blanks
Core Bit Blanks are mainly applicable for drilling the reinforced concrete wall with main specifications from diameter 12mm to 355mm. Adopting the advanced welding technology, subsituting welded pipe for seamless pipe, reducing the processing allowance, improving the processing efficiency.
No trembling while drilling,small resistance on the incision ,improving the holing speed with better deslagging capability.
2. Main Application Areas
(1) Construction Engineering
• Concrete structure sampling (strength testing)
• Water and electricity pipeline drilling (Φ50-200mm)
• Curtain wall stud fixing holes
• Underground continuous wall inspection holes
(2) Stone Processing
• Marble art mosaic drilling
• Auxiliary holes for tombstone engraving
• Installation holes for stone railings
(3) Special Industries
• Drilling holes in high-temperature alloy plates
• Processing of composite material components
• Cutting of glass-fiber-reinforced materials
(4) Emergency Rescue
• Demolition holes for earthquake disasters
• Emergency repair holes for pipelines
• Ventilation holes for enclosed spaces
3. Core technological advantages
| Advantageous dimensions | conventional drill bit | Thin-walled diamond drill bit |
| Cutting efficiency | 0.5-2m/h | 3-8m/h（Wet cutting conditions） |
| Processing accuracy | ±1.5mm | ±0.3mm（High precision type） |
| Surface quality | Requires secondary trimming | Ra≤6.3μm（Directly mountable） |
| Material loss | Cut width 3-8mm | Cut seam1.5-4mm |
| Applicable hardness | ≤HRC50 | Reachable HRC70（Special formula） |
| Service life | 20-50m | 150-400m（High-quality products） |
4. Detailed Product Classification
(1)Core bit blanks Material
• Conventional steel base (65Mn): Φ20-150mm conventional hole diameter
• Alloy steel base (30CrMo): Φ150-400mm large hole diameter
• Titanium alloy base: Special applications in aviation/military industries
