The Diablo Rebar Demon 5/8" x 47" x 52" SDS-Max 4-Cutter Full Carbide Head Hammer Drill Bit is an engineering breakthrough for contractors and tradespeople who need to drill fast, precise holes through reinforced concrete without sacrificing tool life or bit integrity. Engineered in Germany, this heavy-duty SDS-Max bit delivers revolutionary performance in the most demanding concrete drilling applications - from anchor setting in reinforced slabs to penetrating brick and block - thanks to its full carbide head, optimized flute geometry, and advanced welding technology that together set a new standard for carbide hammer drill bits.

Key Features

• Up to 7X longer life versus standard 2-cutter hammer drill bits - dramatically reduces bit replacement frequency and overall cost per hole on reinforced concrete jobsites.
• Dura-Carbide with up to 2X more carbide - withstands up to 1800 deg. Fahrenheit of intense heat compared to standard bits that fail at 800 deg. Fahrenheit, so the bit stays cutting even through rebar strikes 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, resulting in fast, precise holes with less operator fatigue.
• Tri-Metal Fusion Welding with up to 3X stronger weld - keeps the full carbide head intact during extreme rebar impacts, preventing catastrophic head separation that leads to costly downtime.
• Precision Tip - delivers the stability and accuracy required for fast, precise hole placement, critical for anchor setting in reinforced concrete where positioning cannot be compromised.
• Optimized flute design removes dust faster - keeping the carbide head cooler for ultimate strength and durability over thousands of holes in concrete and masonry.
• Wear mark indicator - ensures precise hole depth making so anchor embedment depths are met consistently without guesswork.
• Optimized for maximum performance in corded and cordless SDS-Max rotary hammers - compatible with a wide range of professional hammer drill platforms without sacrificing speed or bit longevity.

Why This Product

• When drilling through concrete slabs containing rebar, conventional 2-cutter bits fail prematurely - the 4-cutter full carbide head on this Rebar Demon bit is specifically engineered to handle rebar contact by taking controlled, smaller bites that extend bit life up to 7X and reduce the vibration that wears out operators.
• The Dura-Carbide formulation withstands up to 1800 deg. Fahrenheit of frictional heat - more than twice the thermal threshold of standard carbide bits - meaning this bit keeps cutting in high-heat drilling scenarios where standard bits would soften, deform, and fail.
• At 52" overall length with a 47" working length, this extra-long SDS-Max bit reaches deep into thick concrete walls, foundations, and structures where shorter bits simply cannot access the required hole depth for anchor setting or through-penetration work.
• The Tri-Metal Fusion Welding process produces a weld bond up to 3X stronger than standard welding, directly addressing the most common failure point in hammer drill bits - head separation during rebar encounters - giving users confidence the bit will hold together under high-impact rotary hammer use.

Specifications

• Brand: Diablo
• Manufacturer Part Number: DMAMX1125
• Category: SDS-Max 4-Cutter
• Diameter: 5/8"
• 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

Frequently Asked Questions

What makes this bit different from a standard 2-cutter SDS-Max hammer drill bit?

The Rebar Demon features a 4-cutter full carbide head rather than a standard 2-cutter configuration. The additional cutters extract smaller, more controlled bites of rebar on each rotation, which reduces vibration and delivers consistent carbide wear. This design, combined with Dura-Carbide that tolerates up to 1800 deg. Fahrenheit versus 800 deg. Fahrenheit for standard bits, results in up to 7X longer bit life in reinforced concrete applications.

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

This bit has an overall length of 52" and a working length of 47". The overall length is the total measurement of the bit from tip to end of shank, while the working length represents the usable drilling depth - the portion of the bit that actually penetrates the material. For deep anchor setting or through-penetration drilling in thick concrete structures, the 47" working length provides substantial reach.

Is this bit compatible with cordless 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 hammers. The flute design is engineered to remove dust efficiently and keep the carbide head cooler regardless of the tool platform, making it a versatile choice for jobsites where cordless convenience or corded power is preferred.

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

Tri-Metal Fusion Welding is Diablo's manufacturing process that produces a weld bond up to 3X stronger than conventional welding methods. This matters specifically for rebar drilling because the sudden, high-impact shock of striking embedded rebar puts extreme stress on the joint between the carbide head and the bit body. A stronger weld keeps the full carbide head intact during these extreme impact events, preventing head separation and the associated safety risk and bit replacement cost.