The CORO Diamond Hole Saw 18mm is engineered to address the challenges of drilling through highly abrasive and brittle materials often encountered in both structural and finishing work. Standard metal cutting or masonry bits can cause cracking, spalling, and surface damage when used on hard stone and tile. This diamond hole saw incorporates industrial‑grade diamond abrasives bonded to a hardened steel body, enabling controlled grinding action through tough surfaces with exceptional precision.

Diamond Grit Bonding and Cutting Action

The cutting rim of the CORO 18mm hole saw is coated with high‑density synthetic diamond particles bonded into a metallic matrix. This industrial diamond coating functions as a finely abrasive grinding surface, removing material gradually rather than cutting aggressively. The uniform distribution of diamond abrasives promotes consistent cutting performance and even wear, resulting in smooth, accurate holes with minimal edge damage.

The 18mm diameter is commonly used for plumbing, electrical conduits, mechanical fixings, saddle valves, and accessory mounts in stone, tile, and engineered surface installations.

Thermal Management and Controlled Drilling

Drilling into dense materials such as granite, marble, and porcelain tiles generates heat rapidly due to friction. The CORO diamond hole saw is designed for low to moderate speed rotary drilling with continuous cooling, typically via water or drilling fluid. Water cooling helps dissipate heat, preventing premature wear of the diamond bond and reducing thermal stress on fragile substrates. It also assists in flushing debris from the cutting zone, maintaining cutting efficiency.

The continuous diamond‑coated rim supports a smooth cutting profile, which reduces the need for secondary finishing around the hole perimeter — especially beneficial in visible interior installations.

Performance in Kenyan Construction and Interior Fit‑outs

Kenyan residential and commercial projects often incorporate stone, porcelain, and ceramic finishes in kitchens, bathrooms, lobbies, and façades. These materials are prized for aesthetic appeal and durability but are challenging to drill without proper tooling. The CORO 18mm diamond hole saw delivers dependable performance on:

• Granite and marble countertops and wall features

• Porcelain and ceramic floor and wall tiles

• Natural stone cladding and decorative stonework

• Engineered stone surfaces

Its core drilling action minimizes substrate stress, helping prevent cracking and surface defects when used with proper cooling and drilling technique.

Compatibility and Recommended Use of Coro Diamond Hole Saw 18mm

The CORO Diamond Hole Saw 18mm is compatible with standard handheld electric drills and drill presses that allow precise speed control. It must be operated in rotary mode only — hammer or impact settings are unsuitable and can damage both the tool and material.

For optimal performance:

• Start drilling at a low RPM to establish a pilot groove

• Use continuous water lubrication to cool the bit and flush cutting debris

• Apply steady, even pressure without forcing the bit

This method enhances hole quality, extends diamond bit life, and improves overall drilling efficiency.

Durability and Cost Efficiency

Diamond‑coated hole saws outperform traditional carbide or steel hole saws on abrasive stone and tile materials due to the superior wear resistance of diamond abrasives. The CORO 18mm bit provides even diamond exposure and consistent cutting action across multiple drilling cycles. This reduces the frequency of replacements, lowering consumable costs and improving productivity on repetitive drilling tasks.

Compliance and Procurement Assurance

All CORO Diamond Hole Saws supplied by Ngong Hills Merchants are KEBS certified, meeting Kenyan standards for construction tools and accessories. Every purchase is supported with a fully eTIMS‑compliant invoice, mandatory for business expense documentation and tax deductions in Kenya from 2026 onwards. This ensures traceable procurement records for contractors, fundis, and registered businesses.

Specifications & Key Features

Use Cases & Applications of Coro Diamond Hole Saw 18mm

• Core drilling holes for plumbing fixtures in stone and tile surfaces

• Creating precise openings for electrical conduits through stone and tiles

• Mounting hardware, anchors, and fixings in marble and engineered stone

• Bathroom, kitchen, and interior finish installations

• Decorative stonework and architectural detailing

This hole saw is essential for tasks that require controlled material removal and surface protection in hard stone and tile drilling.

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