The Simpson SDS-max Quad Head Drill Bit, 3/4 in. x 36 in. Carbide is a premium-grade rotary hammer bit engineered for high-production concrete drilling, including reinforced concrete applications where rebar penetration and precise hole placement are critical. Built on a proprietary flute geometry and a chromium-nickel-molybdenum steel alloy body, this bit is designed to maximize energy transfer from the rotary hammer into the drill tip, delivering faster drilling speeds, reduced operator fatigue, and extended service life across demanding jobsite conditions.

Key Features

• Uniformly Brazed Carbide Inserts - Consistent brazing across all carbide tips means the cutting edges hold up evenly under repeated impact, translating to longer bit life and sustained performance on the job.
• Self-Centering Tips - Accurate hole placement begins at first contact, helping operators avoid layout errors and costly rework on precision anchor and fastener installations.
• Chromium-Nickel-Molybdenum Steel Alloy Body - Premium steel alloy construction maintains hammering quality and resists fatigue under repeated high-impact use, supporting an extended service life.
• Heat-Treatment and Shot-Peened Finish - Surface hardness is increased and resistance to bending forces is improved, while drilling speed goes up and drill bit wear comes down across the full working life of the bit.
• 4 x 90 deg. Head Geometry - The quad-head design crushes through rebar and prevents the bit from sticking in reinforced concrete, keeping high-volume drilling operations moving without interruption.
• High-Volume Multi-Flute Spiral - The double-helix, high-volume flute design rapidly channels concrete dust out of the hole during drilling, maintaining cutting efficiency and improving drilling speed even at depth.
• ANSI Standard B212.15 Conformance - Meeting this recognized industry standard confirms the bit is manufactured to precise dimensional tolerances, making it a reliable fit for applications with strict specification requirements.
• Patented Reinforced Core Flute - The high-performance reinforced core maximizes energy transfer from the rotary hammer into the bit tip, reducing vibration and noise on the operator while boosting overall drilling efficiency.

Why This Product

• Built for reinforced concrete without compromise - The 4 x 90 deg. quad-head geometry is specifically engineered to crush through rebar and resist sticking, making this bit a dependable choice for drilling anchor holes and deep penetrations in rebar-heavy structural concrete.
• Extra reach for deep-hole applications - With a 36 in. overall length and a 31 in. drilling depth, this bit covers deep-hole drilling requirements that shorter bits simply cannot reach, reducing the need for extensions or bit changes mid-task.
• Engineered to reduce operator strain on long shifts - The proprietary flute geometry is designed to reduce vibration and noise transferred to the operator, which matters on high-production sites where this bit is run for extended periods throughout the workday.
• Premium materials and finishing for long-term value - Uniformly brazed carbide inserts, a heat-treated and shot-peened body, and a chromium-nickel-molybdenum steel alloy core combine to extend service life and reduce the frequency of bit replacement, lowering overall cost per hole on large concrete drilling projects.

Specifications

• Model Number (MPN): MDMX07536Q
• Brand: Simpson Strong-Tie
• Shank Type: SDS-max Shank
• Head Type: Quad Head (4x Drill Bit)
• Diameter: 3/4 in.
• Overall Length: 36 in.
• Drilling Depth: 31 in.
• Material: Hardened Steel (Chromium-Nickel-Molybdenum Steel Alloy)
• Tip Material: Carbide
• ANSI Standard: B212.15
• Country of Origin: Germany

Approved Applications

• Drilling into concrete, including reinforced concrete containing rebar
• Deep-hole drilling applications requiring up to 31 in. of drilling depth
• High-production drilling where speed, durability, and reduced operator fatigue are priorities
• Demolition and anchoring work requiring precise, accurately placed holes in concrete and masonry
• Applications demanding compliance with ANSI Standard B212