Diamond core bits set GEKO G40003 — concrete cutters 65 mm and 80 mm, SDS (10)

Set of GEKO diamond core bits G40003 designed for drilling precise circular holes in concrete and masonry. The set contains two diamond core cutters with working diameters of 65 mm and 80 mm and an SDS connection (10) for secure mounting in compatible rotary hammers or core drills using an SDS adapter. These cutters produce clean apertures for installations and fixings where accuracy and minimal chipping are required.

Advantages

The diamond segments provide efficient cutting through reinforced concrete and hard masonry while maintaining long service life. The SDS (10) connection ensures fast and reliable attachment to tools equipped with an appropriate adapter, reducing downtime during bit changes. The two sizes included cover common hole diameters for plumbing, electrical conduits and anchor installations, limiting the need to switch tools on site.

Suitable for

• Making holes for plumbing pipes and drainage in concrete walls and floors
• Creating openings for electrical conduits and cable ducts
• Preparing anchor or fixing points for mechanical fasteners
• Core sampling and trial holes for site layout and inspection

Key specifications

• Cutting diameters: 65 mm and 80 mm
• Connection type: SDS (10) suitable for rotary hammers/core drills with adapter
• Material: diamond-segment cutting edge bonded to steel body
• Intended material: concrete and masonry (including reinforced concrete)
• Typical use: dry or wet cutting depending on tool capability and site conditions

How to use

Install the desired core bit onto the tool via the SDS (10) adapter and ensure it is securely locked before operation. Position the bit perpendicular to the work surface and start drilling at low speed to create a guide groove, then apply steady pressure and increase speed as required. If drilling into reinforced concrete, use controlled, steady feed and avoid excessive side loads. Keep the drill stable and periodically withdraw the bit to clear debris; use water cooling where allowed by the tool to extend diamond life and reduce dust.

Usage recommendations

Use appropriate personal protective equipment including eye protection, hearing protection and dust mask or extraction. Match the tool power and rotation/impact settings to the core bit size and material. For precise, clean holes, use a guide or pilot mark and maintain straight feed. Store the bits dry and protected from impact to preserve segment integrity.