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Updated October 2021
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BestReviews spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We only make money if you purchase a product through our links, and all opinions about the products are our own. Read more  
BestReviews spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We only make money if you purchase a product through our links, and all opinions about the products are our own. Read more  
BestReviews spends thousands of hours researching, analyzing, and testing products to recommend the best picks for most consumers. We buy all products with our own funds, and we never accept free products from manufacturers.Read more 
Bottom line
Pros
Cons
Best of the Best
Bosch 4-Inch x 17-Inch x 22-Inch SDS Max Rotary Hammer Core Bit
Bosch
4-Inch x 17-Inch x 22-Inch SDS Max Rotary Hammer Core Bit
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Bottom Line

This core bit features an integral shank for better power transmission. It also, however, tends to throw a bit of dust and debris.

Pros

Carbide-tipped rotary hammer. Wave design transmits energy faster. Integral shank provides better power transmissions and lets smaller hammers make larger holes. Dust and debris filter out the bottom, away from hands.

Cons

Generates a bit of debris, so be sure to have a water supply nearby.

Best Bang for the Buck
Bosch 3-1/4 In. x 12 In. SDS-max Rotary Hammer Core Bit
Bosch
3-1/4 In. x 12 In. SDS-max Rotary Hammer Core Bit
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Bottom Line

With efficient asymmetrical teeth, this rotary hammer core bit easily cuts through materials as tough as brick, stucco, and concrete block.

Pros

Carbide-tipped centering bit. Asymmetrical teeth will cut faster and last longer. All-in-one core transmits power directly to the end of the bit. Drill through concrete effortlessly. Cuts smoothly and quickly. Choice of size.

Cons

May take a while to drill through, but it makes very precise cuts.

Bosch T3915SC 2-9/16-Inch Sds-Plus Speedcore Thin-Wall Rotary Hammer Core Bit
Bosch
T3915SC 2-9/16-Inch Sds-Plus Speedcore Thin-Wall Rotary Hammer Core Bit
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Bottom Line

Intended for drilling with smaller hammer drills, this bit really delivers when it comes to core removal.

Pros

Tungsten carbide teeth. Integrated pilot bit and mandrel. Ejector hole. Works with Bosch Speedcore SDS-pls pilot bits and extensions. Quality construction. Quick and easy to use.

Cons

Can be challenging to remove from the center drill bit assembly.

Hitachi 724926 SDS Max 2-5/8-Inch x 11-3/8-Inch One Piece Hollow Core Bit
Hitachi
724926 SDS Max 2-5/8-Inch x 11-3/8-Inch One Piece Hollow Core Bit
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Bottom Line

This hollow-core bit was specifically designed for durability and reduced friction. It really shines when it's used on reinforced concrete.

Pros

Hollow core bit is suited for modern rotary hammers. Roof-shaped guide teeth improve tool alignment and stability. Flat hammer teeth are efficient in base. Long lasting. Choice of sizes.

Cons

You stick the drill bit in place rather than screwing in securely, so it can drop out inconveniently.

Bosch HC8021 2-5/8 In. x 12 In. Spline Rotary Hammer Core Bit with Wave Design
Bosch
HC8021 2-5/8 In. x 12 In. Spline Rotary Hammer Core Bit with Wave Design
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Bottom Line

If your rotary hammer needs a spline bit to fit its drive, consider this bit with a newer, more energy-efficient wave design.

Pros

Wave design effectively transfers energy to bit. Integral shank for better transmission. 1-piece design to maximize durability and working life. Intended for drilling masonry and concrete. Works either wet or dry.

Cons

Designed only for use with spline drives. Cannot use with standard 3-jaw chuck drives.

HOW WE TESTED

We recommend these products based on an intensive research process that's designed to cut through the noise and find the top products in this space. Guided by experts, we spend hours looking into the factors that matter, to bring you these selections.

35
Models
Considered
96
Consumers
Consulted
8
Hours
Researched
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Rotary hammers are indispensable tools for making holes in tough materials. Unlike regular drills, rotary hammers use a rotating bit that hammers in and out of concrete using a piston. This allows the tool to make a much larger hole more quickly. Because of the greater stresses involved, a good core bit is required to keep the tool working. The design and durability of the bit are important. A carbide-tipped core bit, for example, will stand up to the abuse concrete can dish out. Pay attention to the design of the shank to make sure it is compatible with your rotary hammer chuck.

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