What Defines a Sintered-Segment Core Bit
Sintering forms the diamond-bearing cutting segment: synthetic diamond is mixed through a metal-powder matrix and consolidated into a solid cutting element. As the matrix wears at the intended rate, new diamond is exposed. The finished core bit is a separate assembly: segments are joined to a steel tube with a connection matched to the drilling machine. Sintering describes segment formation; brazing or laser welding describes the segment-to-tube joint. Neither process name alone determines whether a crown suits wet or dry coring, rebar, a particular spindle or a given diameter.
Zhonghuan OEM Core-Bit Specification
| Item | Approved specification |
|---|---|
| Cutting element | Sintered diamond-impregnated segment; profile, width and height per approved drawing |
| Bond | Metal matrix selected by substrate abrasiveness, machine and cooling mode |
| Tube | Steel tube diameter, wall, working length and runout defined per SKU |
| Connection | 5/8-11 UNC or another approved thread/holder after machine and adapter check |
| Joining | Brazed or laser-welded segment attachment as approved for the specific construction |
| Validation | Segment and joint inspection, dimensional check and drilling in target substrate under an agreed sample plan |
Recommended Core-Bit Program Ranges
| Program | Configuration | Application |
|---|---|---|
| Hand-held masonry cores | Ø35–150 mm planning range; machine-approved connection and dry-use dust control | Brick, block and other approved masonry |
| Small wet core bits | Ø25–100 mm planning range; connection, water path and segment joint matched to the rig | Wet mineral-material coring |
| Other project diameters | Drawing and sample approval by machine, substrate, diameter and working length | Distributor or project OEM program |
Bond Hardness Follows the Substrate
Harder, less abrasive materials often call for a bond that exposes fresh diamond readily; soft but highly abrasive materials may need a more wear-resistant bond. Aggregate, reinforcement, cooling and machine power can change that balance. Specify the actual substrate and drilling mode, then verify cutting speed, wear and hole quality with a sample instead of selecting only an M/H code.
RFQ Checklist
- Substrate, aggregate and reinforcement condition, plus permitted drilling method
- Diameter, working length and quantity for each SKU
- Core drill model, spindle or holder, adapter and water or dust-control system
- Wet or dry mode, segment profile and requested bond direction
- Tube drawing, thread/connection and working-length tolerance
- Approved segment-to-tube joining route and acceptance method
- Sample drilling plan and first-lot dimensional/lot records
- Marking, packaging, destination market and reorder volume
Sample and Lot Acceptance
We return a construction proposal and sample route tied to the buyer’s machine and substrate. The released drawing identifies segment, tube, connection and joining method; the acceptance plan states the measurements and witnessed drilling required for the first lot and repeat orders.
Build Your Sintered Diamond Core Bit Range
Send substrate description, diameter and working-length list, machine connection, and annual volume. We respond with a sintered spec, bond match, matrix hardness verification plan, and quotation path.
Request Sintered Diamond Core OEM Quote