The Simpson SDS-Max Quad-Head Drill Bit 1-1/4 in. x 15 in. Carbide is a premium rotary hammer bit engineered by Simpson for demanding concrete and reinforced concrete drilling applications. Built on a proprietary quad-head dual-cutter design, this bit combines a high-volume, double-helix flute geometry with a reinforced core to maximize energy transfer from the rotary hammer into the tip - delivering faster drilling speeds, reduced operator fatigue, and outstanding durability in heavy-duty construction environments.

Key Features

• Uniformly Brazed Carbide Inserts - Consistent brazing across all cutting edges ensures even wear and longer bit life, reducing the frequency of bit replacement on tough substrates.
• Self-Centering Tips - Accurate hole placement begins at first contact, minimizing walk-off and keeping your work precise even on hard, uneven concrete surfaces.
• Chromium-Nickel-Molybdenum Steel Alloy Body - This high-grade alloy delivers exceptional hammering quality and extended service life, standing up to the repeated high-impact forces of SDS-max rotary hammer drilling.
• Heat-Treatment Procedures and Shot-Peened Finish - Increases surface hardness and drilling speed, reduces drill bit wear, and improves resistance to bending forces, keeping the bit performing reliably under sustained heavy use.
• High-Volume, Multi-Flute Spiral - Quickly channels concrete dust from the hole during drilling, maintaining clear cutting surfaces and continuously improving drilling speed without clogging.
• 4 x 90 deg. Quad-Head Geometry - Crushes through rebar and prevents sticking in reinforced concrete, allowing the bit to maintain forward progress through heavily reinforced slabs without binding.
• ANSI Standard B212.15 Compliance - Meets established industry standards for drill bit performance and dimensional accuracy, giving contractors confidence in consistent, reliable results.
• Patented Reinforced Core Flute Design - The high-performance reinforced core maximizes energy transfer from the rotary hammer into the drill bit tip, enhancing both drilling speed and overall durability.

Why This Product

• Built for Reinforced Concrete - The 4 x 90 deg. quad-head dual-cutter geometry is specifically designed to crush through rebar and resist sticking, making this bit a dependable choice for drilling into heavily reinforced slabs where other bits may bind or stall.
• Engineered to Reduce Operator Fatigue - The proprietary flute geometry reduces vibration and optimizes impact energy transfer, which lowers noise and physical stress on the operator during extended drilling sessions.
• Premium Materials for Long-Term Value - A chromium-nickel-molybdenum steel alloy body combined with uniformly brazed carbide inserts and a heat-treated, shot-peened finish means this bit resists wear and bending forces over a long service life, reducing the cost of frequent replacements.
• Precision From the First Strike - Self-centering tips and a design that conforms to ANSI Standard B212.15 ensure accurate hole placement and consistent performance, which is critical for anchor installation and structural drilling applications where hole location tolerances matter.

Specifications

• Model Number (MPN): MDMX12515Q
• Brand: Simpson Strong-Tie
• Shank Type: SDS-max Shank
• Head Type: Quad Head - 4x Drill Bit
• Diameter: 1-1/4 in.
• Overall Length: 15 in.
• Drilling Depth: 10 in.
• Material: Hardened Steel with Carbide Tip
• Standards Compliance: ANSI Standard B212.15
• Country of Origin: Germany

Approved Applications

• Drilling into concrete and reinforced concrete with rebar present
• High-speed, high-impact rotary hammer drilling requiring accurate hole placement
• Applications where concrete dust evacuation is critical to maintaining drilling speed
• Heavy-duty construction and demolition drilling using SDS-max rotary hammers