Product Features
Product Description
Key Features
- Uniformly Brazed Carbide Inserts: Uniformly brazed carbide inserts resulting in longer bit life.
- Self-Centering Tips: Self-centering tips for accurate hole placement.
- Chromium-Nickel-Molybdenum Steel Alloy Body: Chromium-nickel-molybdenum steel alloy body ensures hammering quality and extended service life.
- Heat-Treatment & Shot-Peened Finish: Heat-treatment procedures and shot-peened finish increase surface hardness, drilling speed, reduces drill bit wear and improves resistance to bending forces.
- ANSI Compliant: Drill bit conforms to ANSI Standard B212.15.
- High-Volume Multi-Flute Spiral: High-volume, multi-flute spiral quickly channels concrete dust from the hole to improve drilling speed.
- 4 x 90 deg. Quad-Head Geometry: 4 x 90 deg. head geometry crushes through rebar and prevents sticking in reinforced concrete.
- Proprietary Flute Geometry: Reduces vibration and optimizes impact energy transfer from the rotary hammer into the drill bit tip, enhancing drilling speed and durability.
- Patented Reinforced Core Flute: High-performance, reinforced core flute maximizes energy transfer via the high-volume, double-helix design.
- SDS-Max Shank: Compatible with SDS-max rotary hammer chucks for secure, tool-free bit changes.
Specifications
- Model Number (MPN): MDMX08721Q
- Shank Type: SDS-max Shank
- Head Type: Quad Head - 4x Drill Bit
- Diameter: 7/8 in.
- Overall Length: 21 in.
- Drilling Depth: 17 in.
- Material: Hardened Steel with Carbide Tip
- Alloy Composition: Chromium-Nickel-Molybdenum Steel Alloy Body
- Standard Compliance: ANSI Standard B212.15
- Country of Origin: Germany (DE)
- Brand: Simpson Strong-Tie
Approved Applications
- Drilling into concrete, including reinforced concrete with rebar
- Heavy-duty rotary hammer drilling using SDS-max shank rotary hammers
- Applications requiring precise, self-centered hole placement
- Drilling and demolition tasks requiring high-speed concrete dust evacuation
- Professional construction, anchoring, and structural attachment applications in concrete substrates
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 SDS-max rotary hammer chucks. The SDS-max shank design allows for secure, tool-free bit changes on any rotary hammer equipped with an SDS-max chuck.
- What is the actual drilling depth and overall length of this bit?
- The Simpson MDMX08721Q has an overall length of 21 inches and a maximum drilling depth of 17 inches. The diameter is 7/8 in., making it well-suited for anchor holes and other applications requiring a deep, precise bore in concrete or masonry.
- Can this bit drill through rebar in reinforced concrete?
- Yes. The quad-head design features a 4 x 90 deg. head geometry that is specifically engineered to crush through rebar and prevent the bit from sticking in reinforced concrete. The self-centering tips also help maintain accurate hole placement even in challenging reinforced concrete applications.
- What materials and standards does this drill bit meet?
- The bit is constructed from a chromium-nickel-molybdenum steel alloy body with uniformly brazed carbide inserts. Heat-treatment procedures and a shot-peened finish increase surface hardness and resistance to bending forces. The drill bit conforms to ANSI Standard B212.15.
Reviews
FAQs
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