The Simpson SDS-max Quad-Head Carbide Drill Bit, 1-1/16 in. x 23 in. is a premium rotary hammer bit engineered for demanding concrete drilling applications, including reinforced concrete where rebar contact is unavoidable. Built on a proprietary flute geometry that reduces vibration and optimizes impact energy transfer, this bit delivers enhanced drilling speed and durability while reducing noise and operator fatigue. The high-volume, double-helix design paired with a patented reinforced core flute maximizes energy transfer from the rotary hammer into the bit tip, making it a dependable choice for professional and commercial drilling tasks that require consistent performance and accurate hole placement.

Key Features

• Uniformly Brazed Carbide Inserts - Precision brazing delivers consistent carbide contact across the full cutting head, resulting in longer bit life and reduced premature wear during extended use.
• Self-Centering Tips - Engineered tip geometry ensures accurate hole placement from the first strike, eliminating bit walking and keeping holes on target in both plain and reinforced concrete.
• Chromium-Nickel-Molybdenum Steel Alloy Body - Premium CrNiMo alloy construction provides exceptional hammering quality and extended service life under continuous heavy-duty use.
• Heat-Treatment and Shot-Peened Finish - Advanced heat-treatment procedures combined with a shot-peened surface finish increase surface hardness, boost drilling speed, reduce bit wear, and improve resistance to bending forces.
• ANSI Standard B212.15 Compliant - Conformance to ANSI Standard B212.15 ensures dimensional accuracy and reliable compatibility with SDS-max rotary hammer systems.
• High-Volume Multi-Flute Spiral - Rapidly channels concrete dust away from the cutting zone and out of the hole, maintaining drilling speed and reducing clogging during deep-hole work.
• 4 x 90 deg. Quad-Head Geometry - The four-cutter head crushes through rebar and actively prevents the bit from sticking in reinforced concrete, keeping production moving without costly downtime.

Why This Product

• Built to Power Through Reinforced Concrete - The 4 x 90 deg. quad-head design crushes through rebar without sticking, making this bit a reliable choice for structural drilling tasks where rebar contact is routine rather than accidental.
• Operator Comfort Without Sacrificing Power - The proprietary flute geometry is specifically engineered to reduce vibration, noise, and physical stress on the operator, allowing for longer, more productive work sessions without compromising impact energy transfer to the bit tip.
• Long-Term Value Through Superior Materials - A CrNiMo alloy body, uniformly brazed carbide inserts, and a heat-treated, shot-peened finish combine to extend service life and reduce the frequency of bit replacement in high-volume drilling environments.
• Engineered Accuracy at Scale - Self-centering tips and ANSI Standard B212.15 compliance ensure every hole is placed correctly and drilled to consistent dimensions, which is critical in applications where anchor performance depends on precise hole geometry.

Specifications

• Model Number (MPN): MDMX10623Q
• Brand: Simpson Strong-Tie
• Head Type: Quad Head - 4x Drill Bit
• Shank Type: SDS-max Shank
• Diameter: 1-1/16 in.
• Overall Length: 23 in.
• Drilling Depth: 18 in.
• Material: Hardened Steel (Chromium-Nickel-Molybdenum Alloy) with Carbide Inserts
• Compliance Standard: ANSI Standard B212.15
• Country of Origin: Germany

Approved Applications

• Drilling into concrete, including reinforced concrete with rebar
• High-volume concrete drilling applications requiring rapid dust evacuation
• Professional and commercial rotary hammer drilling with SDS-max tool systems
• Applications demanding precise hole placement and consistent hole diameter
• Heavy-duty demolition and construction drilling where durability and speed are critical

What's Included

• 1 x Simpson Strong-Tie MDMX10623Q 1-1/16 in. x 23 in. SDS-max Quad-Head Carbide Drill Bit