The Diablo 3/4" x 47" x 52" Rebar Demon SDS-Max 4-Cutter Full Carbide Head Hammer Drill Bit is engineered for professionals who demand durability, speed, and precision when drilling through reinforced concrete and masonry. Designed by Diablo with a full carbide head and four cutting edges, this heavy-duty SDS-Max hammer drill bit tackles the toughest conditions - including direct rebar contact - while delivering controlled wear, reduced vibration, and hole accuracy that anchor-setting applications demand. Whether you are drilling through standard concrete, concrete with rebar, or brick and block, this bit is built to outlast and outperform conventional 2-cutter designs by a wide margin.

Key Features

• Up to 7X longer life versus standard 2-cutter hammer drill bits - significantly reduces bit replacement frequency and downtime on reinforced concrete jobs
• Diablo Dura-Carbide with up to 2X more carbide withstands up to 1800 deg. Fahrenheit of intense heat - where standard bits fail at just 800 deg. Fahrenheit, this bit keeps cutting through rebar hits without losing performance
• Impact Resistant 4-Cutter Full Carbide Head extracts smaller bites of rebar for controlled, consistent carbide wear and reduced vibration - meaning faster, more precise holes with less operator fatigue
• Tri-Metal Fusion Welding features up to 3X stronger weld to keep the full carbide head intact during extreme impact such as rebar - prevents head breakage even under the stress of high-powered rotary hammers
• Precision Tip delivers stability and accuracy required for fast, precise holes - ideal for anchor setting in reinforced concrete where hole placement is critical
• Optimized flute design removes dust faster, keeping the carbide head cooler for ultimate strength and durability - cooler operation means longer-lasting cutting performance over extended drilling sessions
• Wear mark indicator ensures precise hole making - allows you to drill to exact depth without guesswork, improving anchor installation accuracy
• Optimized for maximum performance in corded and cordless SDS-Max rotary hammers - compatible with a wide range of professional-grade tools for jobsite flexibility

Why This Product

• If your work involves drilling through concrete that may contain rebar, this bit is specifically designed for that challenge - the 4-cutter full carbide head takes controlled bites of rebar rather than being damaged by it, extending bit life up to 7X compared to standard 2-cutter bits
• Extreme heat resistance is a practical advantage on long drilling runs - while standard bits lose effectiveness at 800 deg. Fahrenheit, the Dura-Carbide formula in this bit endures up to 1800 deg. Fahrenheit, keeping the cutting edge effective even during sustained, high-output drilling
• The 47" working length and 52" overall length make this bit well-suited for deep anchor holes in thick concrete slabs, walls, or foundations where shorter bits simply cannot reach
• Produced in Germany and engineered with Tri-Metal Fusion Welding, this bit is built to withstand the stress of high-powered corded and cordless rotary hammers, making it a reliable choice for demanding commercial and industrial drilling applications

Specifications

• Brand: Diablo
• Model Number: DMAMX1155
• Category: SDS-Max 4-Cutter Hammer Drill Bits
• Diameter: 3/4"
• Length: 52"
• Working Length: 47"
• Shank: SDS Max
• Head Type: Full Carbide Head
• Number of Cutters: 4
• Materials: Concrete; Concrete with Rebar; Brick/Block
• Pack Quantity: 1
• Country of Origin: Germany

Approved Applications

• Reinforced concrete and concrete

Frequently Asked Questions

What makes the Rebar Demon different from a standard hammer drill bit when hitting rebar?

Standard 2-cutter bits are not designed to handle rebar contact and typically fail or break when they encounter it. The Rebar Demon uses a 4-Cutter Full Carbide Head that takes small, controlled bites of rebar rather than absorbing the full impact at once. Combined with Tri-Metal Fusion Welding - which provides up to 3X stronger weld strength - the full carbide head stays intact during extreme impact, delivering controlled carbide wear and reduced vibration instead of sudden failure.

How much heat can this bit handle compared to standard bits?

This bit uses Diablo Dura-Carbide, which features up to 2X more carbide than standard bits and is formulated to withstand up to 1800 deg. Fahrenheit of intense heat. Standard bits typically fail at around 800 deg. Fahrenheit. This extended heat tolerance is especially important during long drilling runs or when frequent rebar contact generates significant friction and heat at the cutting head.

Is this bit compatible with cordless rotary hammers?

Yes. This bit is optimized for maximum performance in both corded and cordless SDS-Max rotary hammers, giving you flexibility to use it with whichever tool setup your jobsite requires. The SDS-Max shank ensures a secure, positive fit in compatible rotary hammer chucks.

What is the difference between the overall length and the working length of this bit?

The overall length of this bit is 52", which is the full measurement from tip to end of shank. The working length is 47", which represents the usable drilling depth - the portion of the bit that can actively cut into the material. When planning anchor holes or through-penetrations in thick concrete, the 47" working length is the relevant measurement to reference for achievable hole depth.