3-1/2’’

Versatile Dry Concrete Drilling Tools: The Flexible series dry Concrete Core Bits are versatile tools suitable for a wide range of Concrete drilling applications. Crafted with premium-grade diamonds, these Core Bits provide maximum cutting performance and durability in dry cutting scenarios. Laser welding ensures safety and precision during drilling operations.

Key Features:

Ventilated Barrel Design for Efficient Cooling: The FLEXIBLE Series dry Concrete Core Bits feature a specially designed ventilated barrel for efficient cooling and easier removal of material.
Turbo Segments for Rapid Drilling: Turbo segments on the dry Concrete Core Bits provide exceptionally fast drilling and minimize the risk of segment loss during the drilling process.
High Diamond Concentration for Optimal Performance: The FLEXIBLE Series dry Concrete Core Bits boast a high diamond concentration, ensuring remarkable drilling speed and an extended product life.
Dedicated for Dry Drilling: The FLEXIBLE Series dry Concrete Core Bits are specifically designed for dry drilling applications, providing precision and efficiency in various dry drilling scenarios.
Safety through Laser Welding: The FLEXIBLE Series dry Concrete Core Bits undergo Laser welding, ensuring a secure and robust construction for enhanced safety during the drilling process.

Overall, the FLEXIBLE Series dry Concrete Core Bits offer exceptional performance and reliability, making them an indispensable tool for dry drilling operations. Their high performance, precision, safety, and efficiency make them a preferred choice for professionals in various industries, ensuring exceptional drilling performance

Technical Parameter
Item No.	Diameter	Segment Dimensions	Tube Length	Thread
inch	mm	Thickness		L	M
HNSDB1000	1’’	25.5	3.6	10	9’’ (229mm)	5/8’’-11UNC
HNSDB1125	1-1/8’’	28.6	3.8	10	9’’ (229mm)	5/8’’-11UNC
HNSDB1250	1-1/4’’	32	3.8	10	9’’ (229mm)	5/8’’-11UNC
HNSDB1375	1-3/8’’	35	3.8	10	9’’ (229mm)	5/8’’-11UNC
HNSDB1500	1-1/2’’	38.1	3.8	10	9’’ (229mm)	5/8’’-11UNC
HNSDB1750	1-3/4’’	44.5	3.6	10	9’’ (229mm)	5/8’’-11UNC
HNSDB2000	2’’	51.5	3.8	10	9’’ (229mm)	5/8’’-11UNC
HNSDB2250	2-1/4’’	57.2	3.8	10	9’’ (229mm)	5/8’’-11UNC
HNSDB2500	2-1/2’’	64	3.8	10	9’’ (229mm)	5/8’’-11UNC
HNSDB3000	3’’	76.3	3.8	10	9’’ (229mm)	5/8’’-11UNC
HNSDB3500	3-1/2’’	89	4	10	9’’ (229mm)	5/8’’-11UNC
HNSDB4000	4’’	101.8	4.2	10	9’’ (229mm)	5/8’’-11UNC
HNSDB4500	4-1/2’’	114.3	4.6	10	9’’ (229mm)	5/8’’-11UNC
HNSDB5000	5’’	127.2	4.6	10	9’’ (229mm)	5/8’’-11UNC
HNSDB6000	6’’	152.4	4.6	10	9’’ (229mm)	5/8’’-11UNC

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FAQ

Q: How do you prevent rebar when drilling concrete?

Rebar spacing is about 12 inches, so if you've just started drilling and find you're hitting the rebar, it's best to move over a couple of inches to avoid it altogether. Poured and reinforced concrete is tough, so a hammer drill will make the job go much faster.

Q: Will drilling into concrete crack it?

For one, the material is dense and heavy, which makes it hard to drill into. Secondly, concrete tends to crack when it's drilled into, which can cause the drill bit to slip out of place and ruin the hole. Lastly, because of all these factors, concrete is often made up of rebar with steel rods embedded inside.

Q:How thick does concrete need to be to not crack?

Applied-load cracking. In residential concrete, 4 inches is the minimum thickness for walkways and patios. Garage slabs and driveways should be 5 to 6 inches thick if any heavy truck traffic is anticipated, otherwise 4 inches is adequate.

Q: What are the problems with drilling into concrete?

Drilling into concrete is difficult because concrete is dense, hard, and has embedded aggregate stones that can be obstacles to the drill bit. Drilling can quickly dull drill bits. When the bit encounters aggregate, the bit drags even more.