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  • August 07, 2024

What is the difference between SDS Plus and SDS Max drill bits?


In the construction and renovation industry, SDS plus drill bits and SDS max drill bits are two common drilling systems used primarily for drilling heavy materials such as concrete, brick and stone. Although they are both used in rotary hammer drills, there are significant differences between the two in terms of design, usage and performance. This article will detail the differences between SDS plus drill bits and SDS max drill bits to help you make an informed decision when choosing the right tool for the job.

1.SDS Plus Drill Bits

sds drill bits

-Shank diameter: SDS plus drill bits typically have a shank diameter of 10 mm.

-Size & Application: SDS plus is designed for light to medium duty tasks and is commonly found in smaller rotary hammer drills.

-Compatibility: Most DIY hobbyist and general professional use rotary hammer drills are compatible with SDS plus drill bits.

-INSERTION AND REMOVAL: SDS plus drill bits can be easily inserted and removed without tightening or loosening the drill chuck due to their slotted design.

-Length: SDS plus drill bits are typically less than 1 meter in length, making them suitable for most standard drilling tasks.


2.SDS Max Drill Bits

sds drill bits

-Shank diameter: SDS max drill bits have a larger shank diameter, typically 18mm.

-Size and application: Designed for heavy duty tasks, the SDS Max is commonly used in larger rotary hammer drills for specialist construction and demolition work.

-Compatibility: Larger, more powerful rotary hammer drills are often compatible with SDS max drill bits and these tools are often used in professional construction situations.

-Insertion and Removal: Similar to the SDS plus, the SDS max drill bits can be easily inserted and removed due to its fluted design.

-Length: SDS max drill bits are typically available in longer lengths, in excess of 1 meter, for deep and heavy-duty drilling tasks.


3. The Key Differences

-Shank diameter: 10 mm for SDS Plus and 18 mm for SDS Max.

-Application: SDS Plus for light to medium duty tasks; SDS Max for heavy duty tasks.

-Compatibility: SDS Plus for smaller rotary hammer drills; SDS Max for larger, more powerful hammer drills.

-Drill Length: SDS Max drills are typically longer than SDS Plus drills.


In summary, the SDS Plus is suitable for general purpose and medium-duty applications, while the SDS Max is suitable for heavy-duty professional use requiring more strength and durability. Understanding the differences between these two drill systems can help you choose the best tool for the job, improving efficiency and quality

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