SDS-max Drill Bit Bosch Expert 18 mm x 940 mm for Heavy-Duty Concrete Drilling

SDS‑max‑8X 18 mm x 940 mm drill bit by Bosch is a long-reach rotary‑hammer bit designed for drilling deep holes in concrete, masonry and reinforced substrates. The bit is made for SDS‑max chucks and provides the length required to access recessed anchor points, pass-through holes and installations where standard bits are too short. Intended for both professional trade and advanced DIY work, it balances reach and drilling stability for tasks that require accurate, deep concrete drilling.

Advantages

The SDS‑max‑8X bit features a long 940 mm overall length that enables drilling deep and otherwise hard-to-reach holes without the need for extensions. Its 18 mm diameter is suitable for common anchor and dowel sizes. Engineered for SDS‑max rotary hammers, the bit offers secure retention in the chuck and consistent percussion transfer for effective drilling in concrete and masonry. The construction focuses on wear resistance and stable guidance to reduce wandering during long-hole drilling.

Suitable for

• Drilling deep anchor and fixing holes in concrete and reinforced concrete
• Creating through-holes for pipes, conduits and cable runs in masonry walls
• Installation work requiring recessed or hard-to-reach drilling depths
• Professional construction, renovation and advanced DIY projects

Key specifications

• Shank type: SDS‑max compatible
• Diameter: 18 mm
• Overall length: 940 mm
• Intended material: concrete, masonry, reinforced concrete
• Application: rotary hammer drilling with hammer action

How to use

Ensure the rotary hammer is fitted with an SDS‑max chuck and that the drill bit is fully engaged and locked before operation. Mark the drilling position and start drilling at low speed to establish a guide, then apply steady pressure and allow the hammer action to do the cutting. For deep holes, periodically withdraw the bit to clear dust and debris and to prevent clogging; use a vacuum or compressed air to remove dust where required by site conditions. Wear appropriate personal protective equipment and follow the tool manufacturer's instructions for safe operation.

Recommendations

Use the SDS‑max‑8X 18×940 mm bit for tasks that require long-reach drilling in concrete or masonry. For best performance and tool life, match the bit to an SDS‑max rotary hammer with suitable impact energy, clear debris regularly during drilling, and replace the bit if cutting edges show significant wear or damage.