The methods for drilling marble and granite are as follows:
Preparation Work
Select Appropriate Tools
Electric Drill: A high-quality electric drill with rotational speed and torque suitable for stone drilling is required, such as the GDS18V cordless impact drill, which offers strong power and stable rotation.
Drill Bits: Diamond or ceramic drill bits are recommended, as they can withstand high pressure, reduce heat generation, and minimize the risk of stone cracking. Carbide drill bits are suitable for drilling smaller diameters.
Prepare Auxiliary Materials
Lubricant: Water or special stone drilling lubricants (e.g., WD-40 stone drilling lubricant) can reduce heat during drilling.
Shock Pad: Place a rubber pad at the bottom of the drilling area to minimize vibration impact.
Mark the Drilling Position
Use a pencil or erasable marker to accurately mark the drilling position on the stone surface. For high-precision requirements, assist with a laser positioning device.
Drilling Steps
Fix the Stone
Secure the marble or granite on a stable workbench with clamps or rubber pads to prevent movement during drilling. For large or heavy stones, seek assistance from multiple people.
Pre-drill a Small Hole
Using a 1-2 mm small-diameter drill bit , pre-drill a guide hole at the marked position to help position the subsequent drill bit and reduce slipping.
Apply Lubricant
Before drilling, apply an appropriate amount of lubricant to the drill bit and stone surface to improve drilling smoothness.
Drill Gradually
Start with a small-diameter drill bit and gradually increase to the required diameter to prevent stone cracking.
Control the rotational speed at 500-1000 rpm, apply gentle pressure, and avoid excessive force. Use a speed-controlled electric drill to precisely adjust the speed and pressure.
Timely Cooling
During drilling, pause regularly to rinse the drilling area with water (e.g., using a spray bottle) to prevent overheating and cracking of the stone.
Post-processing
Clean the Hole
After drilling, use a brush or hairdryer to remove stone dust around the hole for a neat appearance.
Check for Cracks
Carefully inspect the hole and surrounding area for cracks. If cracks are found, discontinue use and take repair measures, such as applying stone repair adhesive.
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