A streamlined undermount sink cutout workflow reduces remake rates and cycle time in busy stone fabrication shops.
Undermount sink cutouts are among the highest-risk operations in a stone fabrication shop — a cracked slab during cutout wastes an entire countertop worth of material and labor. A defined tool sequence using the right diamond tools at each stage minimizes risk and keeps CNC routers productive. Protec Tools supplies the finger bits, core drills, and blades used across this workflow.
Cutout Sequence
- Layout and template: Verify sink template against the physical sink unit before programming.
- CNC rough cut: Finger bit or straight router bit removes bulk material, leaving 3–5 mm stock at corners.
- Corner finishing: Smaller-diameter finger bit completes inside radii the rough bit cannot reach.
- Faucet holes: Zero-tension core bit drills faucet and soap dispenser openings from the finished face.
- Edge polish: Hand pads or CNC polish wheels finish the exposed cutout edge.
Common Failure Points
- Insufficient support under the cutout area during CNC routing causes snap-out.
- Wrong finger bit diameter for the corner radius leaves stress concentrators.
- Drilling faucet holes from the bottom face causes blowout on the visible surface.
Protec Tools offers cutout tool kits sized for standard undermount sink templates. Request a workflow chart for your CNC platform.
Related Protec Tools products: Laser welded diamond blade, Sintered diamond blade, Diamond core drill bit, Diamond grinding wheel
