The Diablo 1" x 47" x 52" Rebar Demon SDS-Max 4-Cutter Full Carbide Head Hammer Drill Bit is an engineered solution for professionals who need to drill fast, precise holes through reinforced concrete without premature bit failure. Diablo designed this heavy-duty rotary hammer bit to outlast standard 2-cutter bits by up to 7 times, delivering exceptional durability in the most punishing drilling environments - including concrete loaded with rebar. Whether you are setting anchors in structural concrete, drilling through brick and block, or tackling thick reinforced slabs, this Rebar Demon bit is built to handle the heat, the impact, and the abrasion that destroys conventional hammer drill bits.

Key Features

• Up to 7X longer life versus standard 2-cutter hammer drill bits - dramatically reduces bit replacement frequency and downtime on the job site, lowering the true cost per hole drilled.
• Dura-Carbide with up to 2X more carbide material - withstands up to 1800 deg. Fahrenheit of intense heat, far exceeding the 800 deg. Fahrenheit threshold where standard bits fail, so the bit stays sharp and functional even during extended rebar contact.
• Impact Resistant 4-Cutter Full Carbide Head - extracts smaller bites of rebar for controlled, consistent carbide wear and reduced vibration, meaning faster hole completion with less operator fatigue and greater accuracy.
• Tri-Metal Fusion Welding with up to 3X stronger weld - keeps the full carbide head intact during extreme impacts such as rebar strikes, preventing head separation and extending safe, reliable service life.
• Precision Tip geometry - delivers the stability and accuracy required for fast, precise holes in reinforced concrete, critical for anchor setting applications where hole placement cannot be compromised.
• Optimized flute design - removes dust faster, keeping the carbide head cooler for ultimate strength and durability during continuous drilling cycles.
• Wear mark indicator - ensures precise hole depth making so installers can confirm correct embedment depth without measuring after every hole.
• Compatible with corded and cordless SDS-Max rotary hammers - provides maximum flexibility across tool platforms on any job site.
• 1" diameter with 52" overall length and 47" working length - reaches deep embedment applications and long-reach drilling tasks that shorter bits cannot access.
• Made in Germany - produced to exacting tolerances for consistent performance across every bit in the Diablo lineup.

Why This Product

• If rebar strikes regularly destroy your drill bits, the 4-Cutter Full Carbide Head takes controlled, small bites of rebar rather than absorbing the full impact in a single edge, reducing catastrophic wear and keeping you drilling instead of swapping bits.
• Heat buildup is the primary cause of carbide failure in hammer drill bits - with Dura-Carbide rated to 1800 deg. Fahrenheit versus the 800 deg. Fahrenheit limit of standard bits, this Rebar Demon continues performing where conventional bits have already failed.
• For anchor setting in reinforced concrete, hole accuracy is non-negotiable - the Precision Tip and wear mark indicator work together to give installers fast, repeatable hole placement and depth control without constant re-measuring.
• The 1" x 52" size paired with the SDS-Max shank handles deep-reach drilling in heavy concrete that smaller SDS-Plus bits cannot address, making this the right choice for large-diameter anchor bolt installations and thick structural slabs.

Specifications

• Brand: Diablo
• Manufacturer Part Number: DMAMX1245
• Diameter: 1"
• 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
• Concrete with rebar
• Brick and block masonry
• Anchor bolt and anchor setting holes in structural concrete

Frequently Asked Questions

What makes this bit capable of surviving rebar strikes that destroy standard hammer drill bits?

The 4-Cutter Full Carbide Head is the key difference. Rather than absorbing the full force of a rebar hit in a single edge like a standard 2-cutter bit, this design takes small, controlled bites of the rebar across four cutting edges. This distributes wear evenly, reduces vibration, and prevents the sudden carbide fractures that cause standard bits to fail prematurely. Combined with Tri-Metal Fusion Welding that delivers up to 3X stronger weld strength, the head stays firmly attached even under repeated extreme impacts.

How does this bit handle heat differently than a conventional hammer drill bit?

Diablo's Dura-Carbide formulation provides up to 2X more carbide material than standard bits, allowing it to withstand temperatures up to 1800 deg. Fahrenheit - more than double the 800 deg. Fahrenheit threshold at which standard bits fail. The optimized flute design also removes dust and debris from the bore faster, which keeps the carbide head cooler during continuous drilling and contributes directly to longer service life in demanding applications.

Is this bit compatible with my cordless rotary hammer?

Yes. This Rebar Demon bit is optimized for maximum performance in both corded and cordless SDS-Max rotary hammers. The SDS-Max shank fits all standard SDS-Max rotary hammer chucks, making it compatible across a wide range of professional-grade tool platforms.

How do I know when I have reached the correct hole depth when using this bit?

The bit includes a wear mark indicator built into its design, which allows you to confirm precise hole depth during drilling. This is particularly important for anchor setting applications in reinforced concrete, where consistent embedment depth is required for proper anchor performance. The Precision Tip geometry also contributes to the stability and accuracy needed to produce fast, repeatable holes.