The Simpson SDS-max Quad Head Drill Bit, 1 1/8 in. x 17 in. Carbide is a premium rotary hammer bit engineered for demanding concrete and masonry drilling applications where speed, precision, and durability are non-negotiable. Built on a proprietary flute geometry that minimizes vibration and maximizes impact energy transfer from the rotary hammer to the carbide tip, this quad-head bit is purpose-built to handle reinforced concrete, deep anchor holes, and heavy-duty fastener installations with consistent, professional-grade results.

Key Features

• Uniformly Brazed Carbide Inserts - Consistent brazing across every carbide insert ensures even wear and longer bit life, reducing the frequency of bit replacement on the job.
• Self-Centering Tips - Accurately positions the bit at the point of contact for precise hole placement, reducing the need for repositioning and improving overall accuracy in concrete and masonry.
• Chromium-Nickel-Molybdenum Steel Alloy Body - Premium alloy construction delivers superior hammering quality and extended service life under the repeated high-impact stresses of rotary hammer drilling.
• Heat-Treatment and Shot-Peened Finish - Specialized heat-treatment procedures and a shot-peened surface finish increase surface hardness, improve drilling speed, reduce bit wear, and enhance resistance to bending forces, keeping the bit performing longer in tough conditions.
• High-Volume Multi-Flute Spiral - Quickly channels concrete dust out of the hole during drilling to maintain consistent drilling speed and reduce clogging in deep-hole applications.
• 4 x 90 deg. Quad-Head Geometry - Engineered to crush through rebar and prevent the bit from sticking in reinforced concrete, improving both drilling efficiency and operator safety on rebar-heavy pours.
• Patented High-Performance Reinforced Core Flute - The high-volume, double-helix design maximizes energy transfer from hammer to tip, boosting both drilling speed and durability over the full service life of the bit.
• ANSI Standard B212.15 Compliance - Meets established industry standards for rotary hammer drill bits, giving contractors confidence in consistent dimensional accuracy and interchangeability.

Why This Product

• Built to Power Through Reinforced Concrete - The 4 x 90 deg. quad-head design is specifically engineered to crush through rebar rather than deflect or bind, making this bit a reliable choice for drilling in heavily reinforced slabs and walls where standard bits stall or stick.
• Engineered to Reduce Operator Fatigue - The proprietary flute geometry optimizes impact energy transfer and reduces vibration at the source, which means less stress and noise transmitted to the operator over long drilling sessions.
• Premium Materials and Treatments for Long-Term Value - With a chromium-nickel-molybdenum alloy body, uniformly brazed carbide inserts, and a heat-treated shot-peened finish, this bit is built to maintain performance over extended, heavy-use cycles rather than wearing out prematurely.
• Precision from the First Hole to the Last - Self-centering tips eliminate guesswork at hole layout, and the high-volume spiral keeps dust clearing efficiently throughout the full 12 in. drilling depth, so accuracy and speed hold up from start to finish of the task.

Specifications

• Manufacturer Part Number (MPN): MDMX11217Q
• Shank Type: SDS-max Shank
• Head Type: Quad Head (4x Drill Bit)
• Diameter: 1-1/8 in.
• Overall Length: 17 in.
• Drilling Depth: 12 in.
• Material: Hardened Steel (Chromium-Nickel-Molybdenum Alloy)
• Tip Material: Carbide
• Standards Compliance: ANSI Standard B212.15