Concrete drill bit Dedra Quatro 32 x 920/780 mm SDS‑Max

Dedra Quatro 32 x 920/780 mm SDS‑Max is a long-length concrete drill bit designed for rotary hammer use. It is intended for drilling deep holes in concrete, masonry and similar mineral materials where extended reach is required. The drill bit features an SDS‑Max shank for compatibility with SDS‑Max rotary hammers and provides a balanced combination of drilling speed and hole quality for anchor, rebar-dowel and through-hole applications in construction and installation tasks.

Advantages

The Dedra Quatro design offers improved centring and stable drilling performance over long lengths. Its robust construction reduces bit flex and vibration during use, while the hardened carbide tip maintains cutting efficiency in abrasive materials. The SDS‑Max shank ensures secure connection to compatible rotary hammers for reliable power transfer and simpler bit changes on the job.

Suitable for

• Drilling deep anchor holes in concrete and reinforced concrete
• Creating through-holes for plumbing and electrical installations
• Drilling for dowels and rebar connections in masonry
• Repair and retrofit work requiring extended reach

Key specifications

• Diameter: 32 mm
• Total length: 920 mm
• Working length: 780 mm
• Shank type: SDS‑Max
• Suitable materials: concrete, masonry and similar mineral substrates
• Tip: carbide-tipped for enhanced wear resistance

How to use

Fit the SDS‑Max shank securely into a compatible rotary hammer and ensure the tool is set to rotary hammer or rotation-with-hammer mode as required. Mark the drilling point, start at low speed to obtain correct centring, then apply steady axial pressure while allowing the tool and bit to do the cutting. For deep holes, periodically withdraw the bit to clear dust and debris from the hole and reduce heat build-up. Follow the rotary hammer manufacturer’s safety instructions, wear appropriate eye and hearing protection, and ensure the workpiece is stable before drilling.

Usage recommendations

For best results when drilling deep holes, use reduced rotational speed and moderate forward pressure; withdraw the bit regularly to remove dust. Use water only if compatible with both the tool and the working environment; avoid water with electric-powered rotary hammers unless the tool is rated for wet drilling. Inspect the carbide tip before use and replace the bit when wear degrades drilling performance or hole accuracy.