1. Diameter
The diameter depends on what needs to pass through the hole. For pipes, allow some clearance for insulation or sealing. For flush-mounted boxes, there are dedicated core drill bits matched precisely to standard box sizes.
2. Connection
The connection must fit your core drilling machine. Common types are 1 1/4" UNC for larger machines and R 1/2" for smaller machines. You’ll find the specification in your machine’s manual and in the technical data for each core drill bit.
3. Usable length
The usable length determines how deep you can drill in one pass. A long core drill bit is worthwhile for holes through walls; a short one is enough for boxes and installations. If the wall is thicker than the usable length, drill in several passes and remove the core between passes.
4. Material and drilling method
In reinforced concrete, the segments must also cut cleanly through the reinforcement. You can drill through masonry and brick faster with a bond designed for softer materials.
Wet or dry:
- Wet drilling cools the bit, controls dust and is ideal for concrete and large diameters with a drill stand
- Dry drilling is flexible and suitable for masonry and smaller diameters, preferably with dust extraction
Diamond core drill bits from VMAX
Frequently asked questions
Usually the segments have become glazed, or too much water is flowing and the diamonds are no longer exposed. Reduce the water slightly and drill briefly into abrasive material so the segments can grip again.
Yes. We inspect your core drill bit and, if you wish, replace the segments, with express service available if needed.
All core drill bits in the shop
Wet core drill bits, dry core drill bits and core drill bits for flush-mounted boxes in many diameters.
