Bosch HC5031 SDS-max Rotary Hammer Bit 3/4 in x 21 in - Fast Concrete

In this review the Bosch HC5031 3/4 in x 21 in SDS-max Speed-XTM rotary hammer bit is evaluated for tradespeople and serious DIYers who need fast, accurate holes in concrete. The bottom line: it is built for speed and repeatable hole diameter thanks to its inclined side cutters, active-centering tip, and wear mark indicator. For anyone drilling deep masonry holes with an SDS-max hammer this bit's solid carbide head and spiral design deliver noticeably faster progress and cleaner starts compared with standard bits.

Key Features

• Inclined side cutters: Provide the highest drilling speed among similar carbide bits, which cuts down job time on concrete work.
• Compact head design: Promotes faster dust removal during drilling and extends bit life by reducing clogging and heat build-up.
• Active-centering tip: Ensures quick and accurate starts so holes are properly placed without wandering on first contact.
• Wear mark indicator: Lets the user verify the bit still meets hole diameter specifications for consistent results.
• Solid carbide head with S-cutter design: Offers robust cutting edges and multiple chiseling faces for smoother drilling and reduced vibration.

Who It's For

The HC5031 is aimed at contractors, masons, and experienced DIYers who routinely drill deep holes in concrete, block, or other masonry and need the speed advantage of a dedicated carbide spiral bit. It is especially useful when paired with SDS-max rotary hammers where longer reach and serious impact power are required.

Less suitable users include those who only drill occasional shallow holes in softer materials or who use small hammer drills with non-SDS-max chucks; they should look for shorter or less specialized masonry bits designed for lighter tools and lower cost.

Pros & Cons

Pros

• High drilling speed from the inclined side cutters reduces time on deep concrete holes.
• Active-centering tip improves accuracy and makes starts quicker and cleaner.
• Solid carbide head and S-cutter geometry give smoother drilling with less vibration and longer usable life in many jobs.
• Wear mark helps maintain consistent hole diameter across multiple uses.

Cons

• Durability reports are mixed; while many users see long life, some have experienced tip breakage after limited use, so care and matching to the correct hammer and technique matter.
• At 21 in length it may be more than needed for light tasks and can be cumbersome in tight spaces.

Specifications

Brand	Bosch
Model	HC5031 Speed-XTM
Shank Type	SDS-max
Diameter	3/4 in
Length	21 in
Tip Material	Solid carbide with S-cutter
Designed Use	Concrete and masonry drilling

Our Verdict

The Bosch HC5031 3/4 in x 21 in SDS-max rotary hammer bit is a strong choice for professionals and serious DIYers who need high drilling speed, accurate starts, and durable cutting geometry for deep concrete work. It delivers good value when matched to the right SDS-max hammer, though users should be mindful of technique to avoid tip damage in extreme conditions.

Frequently Asked Questions

Will this bit fit my SDS-max hammer?
Yes, it is made for SDS-max drive hammers and is compatible with competitive SDS-max systems and the equivalent TE-Y/TE-FY shanks.

Is the tip replaceable?
The bit uses a solid carbide head designed for longevity; tips are not intended to be replaced separately on this style.

How can I tell when the bit is worn?
Use the wear mark indicator on the bit to confirm whether the cutting diameter still meets specification and replace the bit when the mark shows excessive wear.