Diamond Core Drill Bit JOBIextra KORONA SDS 100 mm, model XT827

JOBIextra KORONA SDS 100 mm is a diamond core drill bit designed for use with SDS-compatible rotary hammer tools. The XT827 model has a 100 mm cutting diameter and a segmented diamond crown that enables fast penetration and controlled coring in concrete, reinforced concrete, masonry and similar mineral substrates. The tool is intended for creating precise circular openings for installations where clean, repeatable holes are required.

Advantages

The diamond-segmented crown provides effective material removal and extended cutting life compared with abrasive bits. The SDS connection ensures secure fitting and efficient transfer of impact and rotation from the rotary hammer. The 100 mm diameter is suitable for many installation tasks while the cylindrical body facilitates easy extraction of the core. The construction of the bit supports steady drilling performance and reduced risk of jamming during coring.

Suitable for

• Core drilling openings for plumbing and pipe installation in concrete and masonry
• Electrical conduit and junction box recesses in walls and floors
• Creating anchor and inspection holes in reinforced concrete
• General construction and renovation tasks requiring circular holes up to 100 mm

Key specifications

• Cutting diameter: 100 mm
• Connection type: SDS-compatible shank
• Cutting material: diamond-segmented crown
• Intended substrates: concrete, reinforced concrete, masonry and similar mineral materials
• Design: cylindrical core barrel for easy core removal

How to use

Mount the JOBIextra KORONA SDS core bit securely into an SDS-compatible rotary hammer according to the tool manufacturer's instructions. Mark the drilling location and, when possible, start with a pilot point or guide to position the bit. Use appropriate speed and moderate pressure; allow the bit to do the cutting rather than forcing it. For reinforced concrete, maintain steady feed and retract periodically to clear dust and cool the segments. When the hole is complete, stop the tool before extracting the core to avoid damage to the bit or the work surface.

Usage recommendations

Use personal protective equipment including eye protection, hearing protection, and a dust mask or extraction when drilling. For prolonged life and optimal performance, use water cooling or periodic wetting when permitted by the rotary hammer and job conditions; otherwise, clear dust frequently. Select drilling speeds and impact settings according to the rotary hammer manufacturer's guidance and the hardness of the material being drilled.