The Simpson SDS-max Quad Head Drill Bit 1-1/2 in. x 23 in. Carbide is a premium rotary hammer bit engineered for demanding concrete and masonry drilling applications, including deep anchor hole preparation and work in heavily reinforced concrete. Built on a high-volume, double-helix quad-head design with a reinforced core flute, this bit is purpose-built to maximize energy transfer from the rotary hammer into the tip, delivering fast, accurate, and durable performance in the toughest substrates.

Key Features

• Uniformly Brazed Carbide Inserts - Consistent bonding strength across the entire cutting head means the tip holds up longer under repeated impact, reducing the need for frequent bit replacement.
• Self-Centering Tips - Accurate hole placement from the very first strike minimizes walkout and keeps your layout precise, even in hard or uneven surfaces.
• Chromium-Nickel-Molybdenum Steel Alloy Body - This premium steel alloy delivers exceptional hammering quality and extended service life under the sustained stress of heavy-duty rotary hammer use.
• Heat-Treatment and Shot-Peened Finish - Specialized heat-treatment procedures combined with a shot-peened surface finish increase surface hardness, boost drilling speed, reduce drill bit wear, and improve resistance to bending forces.
• 4 x 90 deg. Quad-Head Geometry - The four-cutter head crushes through rebar and prevents the bit from sticking in reinforced concrete, keeping work moving without frustrating interruptions.
• High-Volume Multi-Flute Spiral - Rapidly channels concrete dust out of the hole during drilling, improving drilling speed and keeping the cutting zone clear.
• Proprietary Flute Geometry - Reduces vibration and optimizes impact energy transfer from the rotary hammer into the drill bit tip, protecting the operator from excess stress and noise over long work sessions.
• ANSI Standard B212.15 Compliant - Meets a recognized industry standard for rotary hammer drill bits, giving contractors and inspectors confidence in dimensional accuracy and performance reliability.

Why This Product

• Built for reinforced concrete without compromise - The 4 x 90 deg. head geometry is specifically engineered to crush through rebar rather than deflect or bind, making this bit a dependable choice wherever reinforced slabs, walls, or foundations are involved.
• Extended reach for deep anchor installations - With an 18 in. drilling depth and 23 in. overall length on an SDS-max shank, this bit handles deep anchor bolt hole preparation and other long-reach concrete drilling tasks that shorter bits simply cannot reach.
• Designed to reduce operator fatigue - The proprietary flute geometry minimizes vibration and noise transferred to the operator, which matters significantly on long drilling runs or high-volume jobsite work.
• Long-term value through durable construction - From the uniformly brazed carbide inserts and chromium-nickel-molybdenum alloy body to the heat-treated, shot-peened finish, every element of this bit is engineered to extend service life and maintain performance across repeated heavy-duty use.

Specifications

• Model Number (MPN): MDMX15023Q
• Brand: Simpson Strong-Tie
• Shank Type: SDS-max Shank
• Head Type: Quad Head / 4x Drill Bit
• Diameter: 1-1/2 in.
• Overall Length: 23 in.
• Drilling Depth: 18 in.
• Material: Hardened Steel (Chromium-Nickel-Molybdenum Steel Alloy)
• Tip Material: Carbide
• Standards Compliance: ANSI Standard B212.15
• Country of Origin: Germany

Approved Applications

• Drilling into reinforced concrete containing rebar
• Deep-hole drilling in concrete, masonry, and similar hard substrates
• Anchor bolt hole preparation requiring precise diameter tolerances
• Demolition