Simpson MDMX05621 9/16 in. x 21 in. SDS-max Shank Drill Bit is a premium-quality, professional-grade 2-cutter head SDS-max drill bit from Simpson Strong-Tie, engineered for demanding concrete drilling and demolition applications. The proprietary flute geometry reduces vibration and optimizes impact energy transfer from the rotary hammer into the drill bit tip, delivering enhanced drilling speed and durability while reducing noise, stress, and vibration on the operator.

Key Features

• Uniformly brazed carbide inserts resulting in longer bit life
• Self-centering tips for accurate hole placement
• Chromium-nickel-molybdenum steel alloy body ensures hammering quality and extended service life
• Heat-treatment procedures and shot-peened finish increase surface hardness, drilling speed, reduces drill bit wear and improves resistance to bending forces
• Drill bit conforms to ANSI Standard B212.15
• High-volume, multi-flute spiral quickly channels concrete dust from the hole to improve drilling speed
• 4 x 90 deg. head geometry crushes through rebar and prevents sticking in reinforced concrete
• 2-cutter head design for improved durability and drilling speed
• Chisel-shaped drill bit head penetrates material and directs concrete dust into the multi-flute spiral
• Compatible with all current and older SDS-max rotary hammers from major tool brands

Specifications

• Model Number: MDMX05621
• Brand: Simpson Strong-Tie
• Shank Type: SDS-max Shank
• Head Type: 2-Cutter Head
• Diameter: 9/16 in.
• Overall Length: 21 in.
• Drilling Depth: 15-1/2 in.
• Material: Hardened Steel
• Country of Origin: DE

Frequently Asked Questions

What type of rotary hammer is this drill bit compatible with?

This drill bit features an SDS-max shank, making it compatible with all current and older SDS-max rotary hammers from major manufacturers including Black & Decker, Bosch, DeWalt, Hitachi, Hilti, Kango, Makita, Metabo, and Milwaukee.

Can this drill bit be used in reinforced concrete containing rebar?

Yes. The 4 x 90 deg. head geometry is specifically designed to crush through rebar and prevent the bit from sticking in reinforced concrete, making it well-suited for demanding structural drilling tasks.

What is the actual usable drilling depth of this bit?

While the overall length of this bit is 21 in., the drilling depth is 15-1/2 in., which is the maximum depth you can drill into the material.

What quality standards does this drill bit meet?

This drill bit conforms to ANSI Standard B212.15, ensuring it meets precise industry tolerance requirements. The chromium-nickel-molybdenum steel alloy body, heat-treatment procedures, and shot-peened finish further ensure professional-grade performance and durability.

Note: Product dimensions may differ from picture. Please see the item description above for specifications.