The Simpson SDS-max Quad Head Drill Bit, 5/8 in. x 36 in. Carbide is a premium rotary hammer bit engineered for demanding concrete drilling applications where speed, durability, and hole accuracy are critical. Built around a proprietary quad-head dual-cutter design and a high-volume, double-helix flute geometry, this bit is purpose-built for deep-hole drilling in reinforced concrete - including applications where rebar contact is unavoidable. The chromium-nickel-molybdenum steel alloy body, uniformly brazed carbide inserts, and advanced heat-treatment procedures combine to deliver consistent, high-performance results across the full service life of the bit.

Key Features

• Uniformly Brazed Carbide Inserts - Precision brazing technique ensures consistent carbide-to-steel bonding, delivering longer bit life and reliable cutting performance from first use to last.
• Self-Centering Tips - Accurate hole placement from the first strike reduces repositioning time and improves the quality of anchor holes in concrete substrates.
• Chromium-Nickel-Molybdenum Steel Alloy Body - Premium alloy construction withstands the repeated impact loads of SDS-max rotary hammer use, supporting extended service life under heavy professional use.
• Heat-Treatment and Shot-Peened Finish - Advanced heat-treatment procedures combined with a shot-peened surface finish increase surface hardness, improve drilling speed, reduce bit wear, and enhance resistance to bending forces.
• High-Volume, Multi-Flute Spiral - Rapidly channels concrete dust away from the hole during drilling to maintain cutting efficiency and improve overall drilling speed.
• 4 x 90 deg. Quad-Head Geometry - Crushes through rebar and prevents the bit from sticking in reinforced concrete, keeping production moving in the most demanding poured and precast concrete environments.
• High-Volume, Double-Helix Patented Core Flute - Maximizes energy transfer from the rotary hammer into the bit tip, optimizing impact efficiency while reducing vibration and noise on the operator.
• ANSI Standard B212.15 Conformance - Meets established industry dimensional and performance standards, ensuring compatibility and predictable results across qualifying SDS-max tool systems.

Why This Product

• Built for Reinforced Concrete - The 4 x 90 deg. quad-head design is specifically engineered to crush through rebar and resist sticking, making this bit a reliable choice for structural concrete drilling where rebar is present throughout the pour.
• Deep-Hole Capability Without Compromise - With a usable drilling depth of 30 1/2 in. on a 36 in. overall length, this bit handles deep anchor and through-hole applications that shorter bits simply cannot reach - without sacrificing speed or control.
• Engineered for Operator Comfort and Long Shifts - The proprietary flute geometry reduces vibration and noise transferred to the operator, while the optimized impact energy transfer improves drilling speed - so crews work faster with less fatigue over long drilling runs.
• German-Engineered Quality in Every Component - From the uniformly brazed carbide inserts to the heat-treated, shot-peened alloy body, every element of this bit reflects manufacturing precision designed to minimize downtime and replacement frequency on the job site.

Specifications

• Model Number (MPN): MDMX06236Q
• Brand: Simpson Strong-Tie
• Shank Type: SDS-max Shank
• Head Type: Quad Head / 4x Drill Bit
• Diameter: 5/8 in.
• Overall Length: 36 in.
• Drilling Depth: 30-1/2 in.
• Material: Hardened Steel (Chromium-Nickel-Molybdenum Alloy) with Carbide Inserts
• Tip Material: Carbide
• Finish: Shot-Peened
• ANSI Standard: B212.15
• Country of Origin: Germany

Approved Applications

• Drilling into concrete, including heavily reinforced concrete containing rebar
• Deep-hole drilling applications requiring up to 30-1/2 in. drilling depth
• Professional rotary hammer drilling with SDS-max tool systems
• High-speed, high-volume drilling in demanding construction and demolition environments
• Applications requiring precise, accurately placed anchor holes in concrete