The Diablo 3/4" x 31" x 36" Rebar Demon SDS-Max 4-Cutter Full Carbide Head Hammer Drill Bit is engineered for professionals who demand maximum durability and speed when drilling through reinforced concrete, concrete, brick, and block. Designed by Diablo specifically for use with SDS-Max rotary hammer drills, this long-reach hammer drill bit delivers fast, precise holes even when striking rebar - making it the go-to solution for anchor setting and heavy-duty concrete drilling applications where standard bits quickly fail.

Key Features

• Up to 7X longer life versus standard 2-cutter hammer drill bits - significantly reduces bit replacement frequency and overall cost per hole on demanding jobsites
• 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 - keeps the bit functional and strong even during prolonged rebar contact
• Impact Resistant 4-Cutter Full Carbide Head extracts smaller bites of rebar for controlled, consistent carbide wear and reduced vibration - delivers fast, 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 catastrophic head loss even in the most punishing conditions
• Precision Tip delivers stability and accuracy required for fast, precise holes - ensures clean, correctly sized holes for reliable anchor setting in reinforced concrete
• Optimized flute design removes dust faster, keeping the carbide head cooler for ultimate strength and durability - reduces heat buildup that causes premature bit wear
• Wear mark indicator ensures precise hole making - helps operators achieve consistent hole depth without guesswork
• Optimized for maximum performance in corded and cordless SDS-Max rotary hammers - compatible with the full range of professional-grade SDS-Max tool platforms

Why This Product

• Rebar contact that destroys standard bits is handled by this bit's 4-cutter full carbide head, which takes controlled bites of rebar to maintain consistent wear and extend usable life up to 7X longer - reducing downtime and bit costs on reinforced concrete projects
• With a 36" overall length and 31" working length, this bit reaches deep into thick concrete slabs and walls where shorter bits cannot access - ideal for through-slab drilling and long anchor bolt holes in structural applications
• The Dura-Carbide head survives heat levels more than double what standard bits can tolerate - up to 1800 deg. Fahrenheit - meaning it continues cutting effectively under the intense heat generated by high-powered SDS-Max rotary hammers on dense reinforced concrete
• Produced in Germany with Tri-Metal Fusion Welding for a weld that is up to 3X stronger, this bit is built to maintain structural integrity under the repeated shock loads that cause competitor bits to fracture at the head

Specifications

• Brand: Diablo
• MPN: DMAMX1150
• Category: SDS-Max 4-Cutter
• Diameter: 3/4"
• Length: 36"
• Working Length: 31"
• Shank: SDS Max
• Head Type: Full Carbide Head
• Number of Cutters: 4
• Compatible Tools: SDS-Max Rotary Hammer Drill
• Compatible Materials: Reinforced Concrete; Concrete; Rebar; Brick/Block
• Pack Quantity: 1
• Country of Origin: Germany

Approved Applications

• Reinforced concrete and concrete

Frequently Asked Questions

What makes this bit capable of drilling through rebar without failing?

The 4-cutter full carbide head is engineered to take small, controlled bites of rebar rather than attempting to cut through it in large chunks. This approach delivers controlled carbide wear, reduces vibration, and allows the Dura-Carbide material to withstand up to 1800 deg. Fahrenheit of heat - more than double the 800 deg. Fahrenheit threshold at which standard bits fail. Tri-Metal Fusion Welding holds the head intact under the repeated extreme impact of rebar contact.

What type of rotary hammer is required to use this bit?

This bit uses an SDS Max shank and is optimized for use with SDS-Max rotary hammer drills, both corded and cordless. It is not compatible with SDS-Plus rotary hammers, which use a different, smaller shank format.

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

The overall length of this bit is 36", which includes the SDS Max shank that is held in the tool's chuck. The working length is 31", which represents the usable drilling depth available beyond the tool's chuck - this is the maximum depth hole the bit can produce in a single pass.

How does the optimized flute design benefit performance during drilling?

The optimized flute design removes dust and debris from the hole faster as the bit rotates. By clearing material more efficiently, the flute helps keep the carbide head cooler during operation. Lower operating temperatures preserve the carbide's strength and hardness, contributing to the bit's extended service life and consistent cutting performance in concrete and reinforced concrete.