The Diablo 1 1/2" x 31" x 36" Rebar Demon SDS-Max 4-Cutter Carbide-Tipped Hammer Drill Bit is engineered for professionals who demand extreme durability and speed when drilling through reinforced concrete, standard concrete, rebar, and brick or block. Designed to be among the most durable, fastest, and coolest hammer drill bits available, this Diablo bit delivers precision anchor-setting holes in the toughest materials - even when rebar is in the way. With a 36" overall length, a 31" working length, and a 1 1/2" diameter, it is built for deep drilling applications where standard bits simply fall short. Compatible with corded and cordless SDS-Max rotary hammer drills, this bit represents a complete rethinking of what a heavy-duty carbide drill bit can achieve on demanding jobsites.

Key Features

• Up to 7X longer life versus standard 2-cutter hammer drill bits - dramatically reduces bit replacement frequency and total cost on long drilling projects.
• Diablo 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 edge intact during rebar strikes.
• Impact Resistant 4-Cutter Full Carbide Head extracts smaller bites of rebar - delivers controlled, consistent carbide wear and reduced vibration for fast, precise holes even in heavily reinforced concrete.
• Tri-Metal Fusion Welding with up to 3X stronger weld - keeps the full carbide head intact during extreme impact, preventing head loss or breakage when the bit contacts rebar.
• Precision Tip provides stability and accuracy from the first contact - ensures fast, precise holes ideal for anchor setting in reinforced concrete without wandering or skipping.
• Optimized flute design removes dust faster - keeps the carbide head cooler during use for ultimate strength and durability throughout the full working length.
• Wear mark indicator built into the bit - ensures precise hole depth is maintained, eliminating guesswork during anchor-setting applications.
• Optimized for corded and cordless SDS-Max rotary hammers - delivers maximum performance regardless of whether you are working with a corded or battery-powered tool.

Why This Product

• Rebar is no longer a drill-stopper - the 4-cutter full carbide head is specifically engineered to handle rebar hits by taking controlled, small bites rather than shattering or binding, so you can drill through reinforced concrete without stopping to reposition.
• Heat is the enemy of carbide, and Dura-Carbide addresses it directly - by withstanding up to 1800 deg. Fahrenheit compared to the 800 deg. Fahrenheit limit of standard bits, this bit maintains cutting performance in high-heat, high-friction drilling conditions that would destroy conventional bits.
• The 36" overall length and 31" working length make this bit the right choice for deep anchor holes in thick reinforced concrete slabs, walls, and footings where shorter bits simply cannot reach the required depth.
• With up to 7X longer bit life and reduced vibration from the 4-cutter design, crews spend more time drilling and less time changing bits or managing fatigue - a meaningful productivity advantage on large concrete drilling jobs.

Specifications

• Brand: Diablo
• Manufacturer Part Number: DMAMX1380
• Category: SDS-Max 4-Cutter
• Diameter: 1 1/2"
• Length: 36"
• Working Length: 31"
• Shank: SDS-Max
• Head Type: Carbide-Tipped
• Number of Cutters: 4
• 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 through-hole applications

Frequently Asked Questions

What makes the Rebar Demon 4-cutter head different from a standard 2-cutter hammer drill bit?

The 4-cutter full carbide head extracts smaller bites of rebar with each rotation, which delivers controlled, consistent carbide wear and reduced vibration compared to standard 2-cutter bits. This design also contributes to up to 7X longer bit life versus standard 2-cutter hammer drill bits, reducing the frequency of bit changes on heavy reinforced concrete drilling jobs.

How does Dura-Carbide handle rebar hits without failing?

Diablo Dura-Carbide features up to 2X more carbide material than standard bits and is formulated to withstand up to 1800 deg. Fahrenheit of intense heat - more than double the approximately 800 deg. Fahrenheit threshold at which standard bits fail. This heat resistance is critical when the bit contacts rebar repeatedly, since friction-generated heat is the primary cause of carbide degradation and head failure in standard bits.

What is Tri-Metal Fusion Welding and why does it matter?

Tri-Metal Fusion Welding is the process Diablo uses to attach the full carbide head to the bit body, producing a weld that is up to 3X stronger than conventional welding methods. This added weld strength prevents the carbide head from breaking away or separating from the bit during extreme impact situations such as repeated rebar strikes - a common failure mode with standard hammer drill bits used in reinforced concrete.

What SDS-Max rotary hammer drills is this bit compatible with?

This bit is optimized for maximum performance in corded and cordless SDS-Max rotary hammer drills. The SDS-Max shank provides the secure, tool-free chuck engagement that high-powered rotary hammers require for heavy-duty drilling in reinforced concrete, concrete, rebar, and brick or block.