Huada's diamond core drill and segment table covers holes in stone and concrete from 20 to 600 mm. Diameter, tooth count, segment size and connection are separate selection fields; none should be inferred from “core drill” alone.
How the diameter table changes
The smallest rows begin at 20 and 22 mm with two teeth. Tooth count rises through the table as diameter increases, reaching 40 at 600 mm. Segment dimensions also change: early entries include 19 × 3 and 20 × 3 mm forms, while larger rows use 24 × 4, 24 × 4.5, 24 × 5.0 or 20 × 5.0 mm forms with 7/8/10 mm height choices.
Use the exact diameter row in the old table. Do not calculate a tooth count between listed sizes.
Connections shown in the source
The connection list includes 1/2" BSP, 1-1/4" UNC-7, M14, M16, 5/8"-11, Φ20 and Φ22.23. Confirm the drilling machine spindle or adaptor and the required working length. A correct barrel diameter with the wrong connection is not a complete match.
Core-drilling brief
- Stone or concrete and any reinforcement present
- Finished hole diameter, depth and direction
- Core-drill machine and connection
- Wet or other site condition stated in the job plan
- Required barrel, segment row and replacement scope
For replacement segments, provide the existing barrel drawing and segment attachment details as well as the nominal hole diameter. Record the finished hole and segment condition during the first representative test. Retain the supplied item reference.
Original product images
