are sds and sds plus the same

I would guess that "SDS Plus" had more of something. Randy

Absolutely not. They are not interchangeable. The detents in the bits are quite similar, the diameters are quite different. The SDS plus have a much larger diameter, though I've never broken a regular SDS. ______________________________ Keep the whole world singing . . . . DanG (remove the sevens) snipped-for-privacy@7cox.net

SDS and SDS Max are the same. These are the large size.

SDS Plus is different & much smaller.

Tony

Just out of curiosity,what IS an sds?

An old 60s radical group...Students for Democratic Socialism.

They are now all leaders in the Democratic Party.

Rule #35 "That which does not kill you, has made a huge tactical error"

SDS is a type of drill bit used, mainly, for drilling masonry: concrete, stone etc. The acronym stands for, I think, Slotted Drill Shaft or Slotted Drive Shaft. As suggested by the acronym, the drill shaft is special and has some axial slots in it. It requires a special chuck and drive system and cannot be used in an ordinary drill chuck. If you've never used one you will be totally surprised by the ease by which they drill holes in all types of masonry. I have no idea of the difference between SDS and SDS+.

The SDS bit was developed by Bosch in 1975 and the name comes from the German "Steck - Dreh - Sitz" (Insert - Twist - Stay).

SDS is also and confusingly called "SDS-Plus" and often written "SDS+". They are all the same and while the "plus" might once have meant something, it is probably of the same ilk that grades small olives as "large" and large ones as "super colossal." SDS shanks are slotted and have curved recesses all of which lock nicely into the chucks of "SDS rotary hammers." About the biggest diameter SDS bits you'll find are about 1-1/8 inch.

I am sorry that I misread and mislead the original question. I assumed (yes, we all know this word) it was a question between max and regular.

SDS-MAX is the "super colossal" version of SDS-Plus. SDS-MAX hammers drill and pound bigger holes (up to 2") with longer bits (up to 28" or so). SDS-MAX hammers have lots of power, so not only is the hammer drilling faster, the chipping function is extremely useful. Most of these large rotary hammers, however, cannot be used as plain drills like their smaller (SDS+) cousins. They have just two "modes": "hammering with rotation" or "hammer only," and the same is true of almost all Spline Shank hammers.

______________________________ Keep the whole world singing . . . . DanG (remove the sevens) snipped-for-privacy@7cox.net

I didn't know that.

I think that the SDS+ has the two extra "keyways". The SDS had just the two "olives"-recesses. But I might be wrong. Now, you only get the shanks with the "two olives on two keyways".

Nick

Thanks

Tom Miller