When we need to drill heavy-duty material such as concrete, stone, brick, and many more, we need a hammer drill. But regular hammer drill is not efficient for this. Therefore we can use SDS drills with more efficient hammering power. SDS Plus and SDS Max are the best hammer drill available in the market. So let’s see, what are the differences between them.
The main difference between SDS Plus and SDS max is drill bit rails. SDS plus have 04 rails and SDS max has 05 rails. More than that, SDS plus shank is 10mm and length is 110mm-1500mm. But SDS max is 18mm. SDS max is with a locking ball rail so it is more stable than SDS plus.
There is more difference between these drills. So let’s keep reading on more details.
What is SDS Plus Drill?
The SDS plus drill is an improved version of the SDS drill. It can be used for heavy-duty work due to its high performance. An SDS Plus drills are with a powerful hammering action and it uses a special drill bit with 4 rails.
Slotted Drive Shaft (SDS)” had many iterations over the years and can identify with different variations. SDS is about phased out and SDS plus can be bought from most stores. There is a few differences in SDS Vs SDS Plus drills.
Both SDS and SDS plus are used with carbide drill bits. Drills from 5/32” to 1-1/8” and thin wall carbide core bits up to four inches. There are also several types of small chipping and chiselling bits.
SDS, SDS plus, and SDS max are different by their drill bits, operational modes, and chucks.
SDS-Plus bits have four grooves on the shanks. Those four grooves are consisting of two open grooves and two closed grooves. And also locking balls are attached to the grooves. Those grooves lock securely into the chuck.
Although it allows the bit to move back and forth independently of the chuck. They are super easy to insert and remove no tools are required. SDS plus drill has a 10mm diameter shank and 04 rails. This drill bit size is popular and suited for hammering up to 4kg.
The shank of SDS has the advantage of fitting into a simple spring-loaded chuck. Therefore, those bits can simply push into the chuck without tightening. This shank and the chucks of SDS drill bits made for it are especially suited to hammer drilling with masonry drills in stone and concrete.
Read More About – SDS Drill vs Hammer Drill: Which is the Best?
What is SDS Max Drill?
As mentioned earlier, SDS max is an improved version of SDS plus drill type. Among types of SDS drills the big rotary hammers also have a similar system, but a larger one called the SDS-Max.
Speaking of SDS max drills, their shanks are 18mm thick and have 05 rails. The shank, and spline drive bits, have 19 mm. This drill bit size is popular and suited for hammering up to 5kg. That is, the thickness of the SDS plus drill bits are more workable during heavy masonry work.
Such as drilling concrete with reinforcement, and SDS plus is not that much. SDS drills can be used to drill through materials such as steel, brick, masonry, and concrete also.
SDS max drill bit has three open grooves or drivers. And also unlike the SDS Plus drill, there is a locking section instead of a ball
How to Identify SDS Plus and SDS Max Drills?
SDS Drill Bits
2-cutter tungsten carbide plate makes the bit with extra tough SDS drill bits. 2-flute U-shape flute design provides effective dust removal and a standard lifetime to SDS plus drill bits. The SDS carbide-tipped drill bit is a masonry bit.
It was designed for strong drilling like concrete drilling. But unlike ordinary SDS drill bits, the SDS drill bit provides a longer service life.
These carbide-tipped masonry drill bits are more durable and maintain a sharp cutting edge better than normal hammer drills due to the hardness of the heads.
SDS drill bits are tougher and more resistant to extreme loads because of the material of tungsten carbide.
SDS Plus and SDS Max
Multi-cutter or Y-cutter can be found on SDS Plus and SDS Max bits. On standard bits, these designs cannot be as useful due to their inserted tip design. Those cutter types are often found on dustless drill bits to efficiently move dust into the vacuum holes.
There are also SDS Max drills, which have larger drill bits with more indentations on materials. They are generally used more for heavier duty work such as tough masonry and rock. They are also used for demolition purposes. Most standard SDS rotary hammer drills are SDS plus drills. Heavy-duty combination hammers are generally SDS Max drills that use SDS Max drill bits.
SDS plus drill and SDS max drill shank sizes are different. The shank size of the SDS plus drill bit is 10mm. The shank size of the SDS max drill is 18mm. Therefore, The SDS max bits cannot interchangeable with SDS or SDS plus drill.
Will SDS Plus Bits Fit SDS Max?
Simply, SDS plus bits will not fix in SDS max due to their different rails. Different SDS drill bits need a different power tool. Because there is a physically different between the two drill bits beforehand, these two bits can never be used on both devices. SDS plus drill bits are smaller to fix with the chuck of the SDS max drill.
SDS plus drill bit,
- Shank size is 10mm
- Four rails to fix with chuck
- The shortest SDS-plus masonry drill bits are about 110 mm in overall length
- The longest 1500 mm
SDS max drill,
- 18mm shank with three open grooves,
- Locking segments rather than balls.
Are SDS Plus and SDS Max Interchangeable?
Basically, SDS and SDS plus are interchangeable because of their same size of drill bits. Although the SDS and SDS plus cannot be interchangeable with SDS max drill because of the size of the SDS max drill. There are adapters and chucks to use the smaller SDS or SDS plus drill bits in an SDS max rotary hammer.
Although SDS Max was not intended to be backwards compatible with SDS or SDS plus drill bits.
Both SDS plus and SDS max require different hammer tools. Although, many people who use both types of equipment often used them in the same body by using an adapter.
The adapter helps to use the same body for both of them efficiently. The adapter compensates for the differences in the drills so that both can be used in the same body or on occasion without buying another rotary hammer.
How SDS Drill is Varied With Hammer Drill?
When considering the SDS drill and hammer drill, there is an extraordinary difference in the chuck.
Both SDS and Hammer drills have hammering mechanisms. The Hammer drill chuck is moving forward and backward during the hammer action and in the SDS drills, only the bit is moving forward and backward. Hence its hammer action is higher than a regular hammer drill mechanism.
Although chuck on hammer drill is not designed to hold SDS drill bit. Therefore; the SDS drill bit can become loose and you have to tighten the chuck. If not it begins to wobble and slip during the drilling. Anyway if you need a drill tough materials like concrete and masonry, an SDS drill will be the best option.
Hammer drills can name “percussion drills” also. Because their hammering mechanism is different. A hammer drill chuck has three jaws. While tightening the chuck, these three jaws can move close, and the drill bit will tighten.
Hammer drills and SDS drill types do not need to provide much torque for the drilling there, for the chuck will not lose.SDS drills are with a different chuck without a key or rotational tighten. Just move backward the chuck and then drill put it into the chuck and move forward.
SDS drill is different from a hammer drill, in its
- Mechanism,
- Usage,
- Hammering power,
- Chuck,
- Types of drill bits.
Read More About – SDS Drill vs Hammer Drill: Which is the Best?
| SDS Drill | Hammer Drill | |
| Mechanism | With a piston-based hammering mechanism | With percussion mechanism |
| Usage | Heavy-duty deep drilling | Light drilling |
| Chuck | Quick changed chuck | Keyless |
| Use hammer mode only | Yes | No |
| Drill bits | Special bits | Circular |
| Conclusion | Has more power and more performance | With less hammering power |
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