Meaning of specifications for SDS rotary hammers?

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In summary, the conversation is discussing specifications for SDS-plus chuck rotary hammers, specifically the "Makita 1 inch D-Handle SDS-PLUS" model. The question is about the significance of the "1 inch" specification, which is clarified as the maximum recommended diameter bit for use with the hammer. It is also noted that a larger bit may fit, but could overwork the drill motor and it is important to use a drill motor rated for a larger diameter than the one being used.
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Stephen Tashi
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Online, I see SDS-plus chuck rotary hammers with specifications like "Makita 1 inch D-Handle SDS-PLUS". What does the "1 inch" specify?

I think the shanks of all SDS-plus bits have the same dimensions. So does the "1 inch" refer to the largest diameter bit that is recommended for use with the hammer? Wouldn't a 1 1/16 diameter SDS-pus bit fit in the chuck of a "1-inch" SDS-plus hammer? Or does "1 inch" refer to the length of the hammer stroke?
 
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  • #2
You are correct that all sds+ shanks are the same size, and the 1" is the maximum recommended diameter bit.
A larger bit will fit, but may overwork the drill motor. Always use a drill motor rated for a larger diameter than you are going to use.
 

1. What is the purpose of specifications for SDS rotary hammers?

The purpose of specifications for SDS rotary hammers is to provide detailed information about the features, capabilities, and limitations of the tool. This allows users to make informed decisions about which rotary hammer is best suited for their specific needs.

2. What do SDS and SDS-Plus mean in relation to rotary hammers?

SDS and SDS-Plus refer to the type of chuck system used in rotary hammers. SDS stands for "Special Direct System" and SDS-Plus is an improved version of this system. These chucks allow for quick and easy changes of drill bits and provide a more secure grip than traditional chucks.

3. How do I determine the power of an SDS rotary hammer?

The power of an SDS rotary hammer is determined by its voltage and impact energy. Voltage refers to the amount of electrical current used by the motor, while impact energy is the force produced by the hammering action. Generally, the higher the voltage and impact energy, the more powerful the rotary hammer will be.

4. Are SDS rotary hammers suitable for all types of materials?

No, SDS rotary hammers are not suitable for all types of materials. They are best suited for drilling and chiseling through concrete, brick, and stone. They may also be used for drilling through wood and metal, but other types of drills may be more efficient for these materials.

5. What safety precautions should I take when using an SDS rotary hammer?

When using an SDS rotary hammer, it is important to wear appropriate personal protective equipment, such as safety glasses and earplugs. Make sure to read and follow the manufacturer's instructions and do not exceed the recommended speed and pressure. It is also important to keep the tool and work area clean and free of debris to prevent accidents.

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