Granite & Marble Countertop Fabrication
Application Overview
Countertop fabrication is precision stone work: every faucet hole, sink cutout, and edge profile must be chip-free on the polished surface. Granite and marble are natural materials with varying hardness and internal stress, and aggressive or dry cutting cracks slabs worth hundreds of dollars per linear meter. Zhonghuan wet diamond core drills handle the round penetrations (faucet holes, soap dispenser openings, sink corner radii), while continuous rim diamond blades manage the straight cuts for sink cutouts and slab sizing.
Recommended Products
| Product | Size Range | Countertop Application |
|---|---|---|
| Diamond Core Drills (wet) | 25-200 mm | Faucet holes, soap dispenser openings, sink corner starter holes |
| Diamond Blade (continuous rim) | 115-230 mm | Straight cuts for sink cutouts, slab sizing, and edge trimming |
Application Scenarios
1. Faucet Holes in Granite Countertop
Material: Polished granite slab, 20-30 mm thick
Recommended: Diamond core drill (wet), 35 mm
Notes: Wet drill from the polished face at 300-500 RPM. Use a centering guide or drill press to prevent wander. Place a sacrificial board beneath the slab to prevent exit-side chipping. For three-hole faucet configurations, use a drilling template to maintain exact 100 mm or 200 mm spacing between holes.
2. Undermount Sink Cutout
Material: Granite or marble slab, 20-30 mm thick
Recommended: Diamond core drill 10-12 mm (corner starter holes) + continuous rim diamond blade 115-125 mm (straight cuts)
Notes: Mark the sink template on the underside of the slab. Core drill starter holes at each corner radius. Cut between the starter holes with a continuous rim diamond blade on a wet-feed angle grinder. Finish the corner radii with a hand polisher and diamond pad. For marble, use slower feed rates to prevent cracking along natural veins.
3. Edge Profiling and Trimming
Material: Granite or marble edge, 20-40 mm thick
Recommended: Continuous rim diamond blade, 115 mm, wet cutting
Notes: Continuous rim blades produce the smoothest edge cut with minimal chipping. For bullnose or ogee edge profiles, the initial rough shape is cut with the blade, then refined with diamond hand pads or a CNC profiler. Keep the blade wet throughout to prevent thermal cracking of the stone.
Selection Tips
- Always wet-cut natural stone: dry cutting destroys diamond tools and cracks slabs. Water is non-negotiable for granite and marble.
- Continuous rim for visible edges, turbo for hidden cuts: the right blade type prevents costly rework on polished surfaces.
- Drill from the polished face: any chipping occurs on the exit (underside), keeping the visible surface clean.
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