Diamond Core Bit Distar Korona RS8-X 82 mm x 450 mm 1 1/4" Wet Cutting

The Distar Korona RS8-X diamond core bit, 82 mm in diameter and 450 mm long with a 1 1/4" connection, is designed for wet cutting of concrete, reinforced concrete and masonry. The core bit uses diamond segments and water cooling to extend cutting life, reduce dust and keep the cutting zone cool. It is intended for use with compatible core drilling rigs and hand-held core drills that accept a 1 1/4" thread for precise hole drilling in construction and renovation tasks.

Advantages

The diamond segments and optimized matrix provide stable cutting performance and a balance between cutting speed and segment life. Wet cutting reduces dust and prevents overheating, which helps maintain segment integrity and produces cleaner holes. The 450 mm overall length allows drilling through typical slab thicknesses and masonry walls while the 82 mm diameter suits common pipe, conduit and anchor hole sizes. Threaded connection ensures secure mounting on compatible core drills.

Suitable for

• Drilling holes for plumbing and electrical conduits in concrete and masonry
• Creating openings for anchors and fixings in reinforced concrete
• Core sampling and making service penetrations in renovation projects
• Use with core drilling rigs and hand-held wet core drills that accept a 1 1/4" thread

When it may not be suitable

This core bit is designed specifically for wet cutting; it is not intended for dry drilling applications. Using it without water cooling may shorten segment life, increase dust and risk overheating. It may also be unsuitable for very soft materials or delicate tile work where a different diamond specification or a smaller diameter bit designed for finishing would be preferable.

Key specifications

• Diameter: 82 mm
• Overall length: 450 mm
• Connection: 1 1/4" threaded
• Cutting method: Wet cutting with diamond segments
• Recommended materials: Concrete, reinforced concrete, masonry

How to use

Mount the core bit securely on a compatible core drill with a 1 1/4" thread following the drill manufacturer's instructions. Use continuous water supply to the cutting zone to cool the diamond segments and remove slurry. Start drilling at low speed to establish the pilot contact, then increase speed and apply steady feed pressure appropriate for the drill and material. Periodically withdraw the bit to flush out debris and check progress. After use, clean the bit and store it dry to prevent corrosion.

What to consider before purchase

• Verify that your core drill accepts a 1 1/4" threaded connection
• Confirm the 82 mm diameter and 450 mm length are suitable for the hole depth and application
• Ensure you will use wet cutting and have an adequate water supply or coolant system
• Check compatibility with the materials you intend to drill (concrete, reinforced concrete, masonry)

Usage recommendations

Use steady, controlled feed pressure and consistent water flow for optimal cutting life. Avoid excessive side loads or twisting during drilling and allow the bit to cool periodically if drilling long runs. Inspect diamond segments for wear and replace the core bit when cutting performance drops significantly.