Rotary Hammer questions

SDS-plus=AE BULLDOG Xtreme Rotary Hammer> what does the 1" mean? It is

SDS-plus® BULLDOG Xtreme Rotary Hammer> what does the 1" mean? It is

>When purchasing a rotary hammer, they come with either SDS, SDS-Plus
>or SDS-max. I understand SDS-max is a different slot system, but
>there seems to be no visible difference between SDS and SDS-plus. Is
>there?
>Also, what does the size mean in a rotary hammer? For example a <1"
>SDS-plus® BULLDOG Xtreme Rotary Hammer> what does the 1" mean? It is
>totally unrelated to the actual bit sizes, I mean you do not buy a bit
>that is rated for a 1" hammer or a 7/8" hammer, so what is the
>significance of the size of a hammer?

SDS-plus® BULLDOG Xtreme Rotary Hammer> what does the 1" mean? It is

> When purchasing a rotary hammer, they come with either SDS, SDS-Plus
> or SDS-max. I understand SDS-max is a different slot system, but
> there seems to be no visible difference between SDS and SDS-plus. Is
> there?
> Also, what does the size mean in a rotary hammer? For example a <1"
> SDS-plus® BULLDOG Xtreme Rotary Hammer> what does the 1" mean? It is
> totally unrelated to the actual bit sizes, I mean you do not buy a bit
> that is rated for a 1" hammer or a 7/8" hammer, so what is the
> significance of the size of a hammer?
> =====================================================
> SDS max is a much bigger diameter, for bigger hammers and rotary hammers.
> I think SDS-Plus is alightly bigger than plain SDS.
> Hole size:
> I believe it's the size of the hole the motor is equipped to drill in
> concrete, long term.
> Not 100% sure, but that's what I surmise.
> Having said that, I have the Bulldog, and it is a very capable tool --
> so-called "D-handle"..
> But, unless you are doing a lot of hole drilling, you might be better off
> with the pistol grip equivalent, which is much more ergonometric for most
> drilling, and packs a helluva wallop, as far as hard concrete goes.
> Colbert may be right about HF stuff, but you have to be careful about the
> type of hammer. "Hammer drills" typically have 15-20,000 bps (bumps per
> second), and even quality ones (milwaukee, porter cable) will handle only
> so much hard concrete/stone.
> "Rotary Hammers" have many fewer bps, typically about 5,000, but each
> "bump" carries significantly more stone-breaking energy in each bump.
> What could take a hammer drill 5-10 minutes of supreme effort (and
> probably numerous wasted carbide bits) will take 5-30 seconds with a
> bulldog or equivalent. Night and day.
> HF stuff is OK, if the applications are not critical or demanding. I have
> bought a lot of HF stuff, and am quite happy with their winches and a
> couple of other things. Their close-quarter drill is OK, comes in handy.
> But you will most likely appreciate the Bulldog if you have real work to
> do.
> Oh, since I have both handy:
> The D-handle bulldog (11224 VSR) is 0-1100 rpm, 0-6150 bpm, 6.9 A.
> The pistol grip Bulldog is subnamed RotoHammer (11250 VSR), and is 0-1350
> rpm, 0-6,000 bpm, 6.0 A.
> Both come with a rotatable siide handle. The D-handle comes in a metal
> case.
> The pistol grip was hard to find, and I wound up getting a display model
> with no cord for $35 from HD. Don't know about a case for the pistol grip.
> And speaking of HD, a good hardware store will beat HD prices by 10%, and
> at worst will match HD.
> It is said that stuff sold by HD is made *for* HD, and made more cheaply,
> and there is no way for the consumer to really know what's what. I won't
> bet the farm on this, but I've heard this from a number of sources.
> Either Bosch or Hilti, on either their lit or placards, list the energy
> per bump in joules for each tool! For quite an accurate comparison.
> You'd proly be hardpressed to find these numbers for the higher bpm hammer
> drills, but I'll bet the numerical difference would be, uh, striking.

> --
> EA
> Thanks,
> MC
>