Rotary Hammer Drill Bit Heller Y‑Cutter SDS‑max, cutting Ø 40 mm, working length 400 mm, total length 520 mm

The Heller Y‑Cutter SDS‑max Rotary Hammer Drill Bit is a heavy‑duty drilling tool with a 40 mm cutting diameter, 400 mm working length and 520 mm total length. Designed for SDS‑max chucks, this bit combines a reinforced shaft and a Y‑Cutter geometry to facilitate faster penetration and improved removal of dust and debris during drilling in concrete, reinforced concrete and masonry. The tool is intended for use with SDS‑max rotary hammers and is engineered to withstand repeated impact loads typical on construction and renovation sites.

Advantages

The Y‑Cutter geometry reduces clogging and promotes efficient evacuation of material from the hole, which can increase drilling speed and reduce binding. The 400 mm working length provides extended reach for deep drilling tasks while the 520 mm total length ensures secure engagement in the chuck. Built for SDS‑max systems, the bit offers compatibility with a wide range of professional rotary hammers and delivers consistent performance in heavy‑duty applications.

Suitable for

• Drilling large‑diameter holes in concrete and reinforced concrete
• Making openings for anchors and through‑holes in masonry
• Renovation and construction where deep, clean holes are required
• Use with SDS‑max rotary hammers in professional and trade environments

When it may not be suitable

This SDS‑max bit is not intended for use with standard drill chucks, SDS‑plus machines, or light‑duty cordless drills. It is not designed for drilling in wood, metal or ceramic tiles; using the bit on inappropriate materials can cause poor results or damage the cutting edges. For precision or very shallow pilot holes, a smaller diameter or dedicated masonry bit may be more appropriate.

Key specifications

• Cutting diameter: 40 mm
• Working length: 400 mm
• Total length: 520 mm
• Shank type: SDS‑max compatible
• Geometry: Y‑Cutter for improved debris removal
• Intended materials: concrete, reinforced concrete, masonry

How to use

Install the rotary hammer drill bit into an SDS‑max chuck according to the rotary hammer manufacturer's instructions, ensuring the shank is fully seated and locked. Set the tool to the drilling or hammer‑drilling mode as required for the material. Begin drilling at low speed to locate the hole, then apply steady pressure while allowing the hammer to perform the impact action; avoid excessive axial force which can overheat or damage the bit. Periodically withdraw the bit to clear dust and improve debris evacuation, especially when drilling deep holes. Use appropriate personal protective equipment including eye protection, hearing protection and dust control measures.

What to consider before purchase

• Confirm compatibility with your rotary hammer's SDS‑max chuck
• Verify that 40 mm diameter and 400 mm working length meet your hole size and depth requirements
• Consider the material to be drilled—suitable for concrete, reinforced concrete and masonry only
• Ensure you have appropriate protective equipment and dust extraction for drilling tasks

Usage recommendations

For best results in heavy‑duty concrete work, use the Heller Y‑Cutter SDS‑max bit with a compatible professional rotary hammer set to hammer‑drilling mode, maintain steady pressure without forcing, and periodically withdraw the bit to clear debris. When drilling reinforced concrete, progress slowly through rebar to avoid sudden shocks; inspect the bit regularly for wear and replace when cutting edges become rounded or damaged.