The Diablo 1-3/8" x 24" x 29" Rebar Demon SDS-Max 4-Cutter Carbide-Tipped Hammer Drill Bit is engineered for professionals who need to drill fast, precise holes through reinforced concrete, concrete, brick, and block without sacrificing bit life. Diablo designed this SDS-Max rotary hammer bit around a full-carbide 4-cutter head and Dura-Carbide technology that survives rebar strikes and extreme heat - conditions that destroy ordinary hammer drill bits. Whether you are setting anchors in rebar-heavy slabs or punching through dense masonry, this 1-3/8" diameter bit with a 24" working length and 29" overall length delivers the controlled, consistent performance demanding job sites require.

Key Features

• Up to 7X longer life versus standard 2-cutter hammer drill bits - dramatically reduces bit replacement frequency and downtime on heavy drilling tasks in reinforced concrete.
• Dura-Carbide with up to 2X more carbide - withstands up to 1800 deg. Fahrenheit of intense heat, versus standard bits that fail at 800 deg. Fahrenheit, keeping the cutting head intact through rebar hits that would destroy conventional bits.
• Impact Resistant 4-Cutter Full Carbide Head - extracts smaller bites of rebar for controlled, consistent carbide wear and reduced vibration, delivering fast and precise holes in reinforced concrete and masonry.
• Tri-Metal Fusion Welding with up to 3X stronger weld - keeps the full carbide head securely bonded during extreme impact events like rebar strikes, preventing catastrophic head separation.
• Precision Tip - provides the stability and accuracy required for fast, precise hole placement, which is critical for accurate anchor setting in reinforced concrete.
• Optimized flute design removes dust faster - keeping the carbide head cooler for sustained strength and durability during extended drilling sessions.
• Wear mark indicator - ensures precise hole depth control so users hit their target depth consistently without over-drilling.
• Optimized for corded and cordless SDS-Max rotary hammers - compatible across a wide range of high-powered tools for maximum job site flexibility.

Why This Product

• Rebar is the most common bit killer on concrete drilling jobs - the 4-cutter full carbide head and Dura-Carbide technology are specifically built to survive rebar contact and keep cutting, making this bit a reliable choice for reinforced concrete anchor setting rather than a one-hit consumable.
• Heat buildup shortens bit life faster than almost any other factor - the optimized flute design expels dust rapidly to keep the head cooler, and Dura-Carbide tolerates up to 1800 deg. Fahrenheit, giving this bit a meaningful durability advantage over standard 2-cutter bits rated to only 800 deg. Fahrenheit.
• Reduced vibration from the 4-cutter head geometry means less fatigue for the operator and more controlled hole placement - important when drilling multiple holes in sequence for anchor patterns in concrete structures.
• With a 24" working length and 29" overall length in a 1-3/8" diameter, this SDS-Max bit handles deep penetration tasks in thick concrete slabs and walls where shorter bits simply cannot reach.

Specifications

• Brand: Diablo
• Manufacturer Part Number: DMAMX1340
• Diameter: 1-3/8"
• Overall Length: 29"
• Working Length: 24"
• Shank: SDS Max
• Head Type: Carbide-Tipped
• Number of Cutters: 4
• Category: SDS-Max 4-Cutter
• Compatible Tools: SDS-Max Rotary Hammer Drill
• Materials: Reinforced Concrete; Concrete; Rebar; Brick/Block
• Pack Quantity: 1
• Country of Origin: Germany

Approved Applications

• Reinforced concrete and concrete drilling for anchor setting and penetration work

Frequently Asked Questions

What makes the 4-cutter head better than a standard 2-cutter hammer drill bit for rebar-heavy concrete?

The Impact Resistant 4-Cutter Full Carbide Head takes smaller bites of rebar with each rotation, resulting in controlled, consistent carbide wear and reduced vibration compared to standard 2-cutter designs. This controlled engagement is the primary reason the Rebar Demon delivers up to 7X longer life versus standard 2-cutter hammer drill bits when drilling through reinforced concrete.

How hot can this bit get before it fails, and why does that matter?

Diablo's Dura-Carbide technology allows this bit to withstand up to 1800 deg. Fahrenheit of intense heat. Standard bits typically fail at around 800 deg. Fahrenheit. In demanding drilling applications - particularly when hitting rebar repeatedly - heat buildup accelerates bit wear significantly. The Dura-Carbide formulation, combined with the optimized flute design that removes dust quickly to keep the head cooler, helps maintain cutting performance under conditions that destroy conventional bits.

Is this bit compatible with cordless SDS-Max rotary hammers, or only corded tools?

This Rebar Demon SDS-Max bit is optimized for maximum performance in both corded and cordless SDS-Max rotary hammer drills. The SDS-Max shank interfaces with any standard SDS-Max chuck system regardless of whether the tool is corded or battery-powered.

What is Tri-Metal Fusion Welding and why does it matter for drilling through rebar?

Tri-Metal Fusion Welding is the process Diablo uses to bond the full carbide head to the bit body. It produces a weld rated at up to 3X stronger than standard welding methods. When a bit contacts rebar at high speed, the impact force is transmitted directly to the weld joint - a weaker bond can cause the head to separate entirely. The stronger weld keeps the carbide head intact during extreme impact situations, protecting both the bit and the operator.