12v drills
 

If you look at the information you quoted ( Porter-Cable) the grinders are
rated at one speed. Also if you can lean on a 7 amp grinder enough to slow
it down, you have produced enough friction to have already burned through
the gelcoat. Again if 3M recomends a max of 3000 rpm, and you exceed with
sucess I commend you, you were lucky, and very careful. Besides B&D shows
only 2 grinders on their site, both 4 1/2" dia with a speed of 10,000rpm
http://www.blackanddecker.com/produc...owertools.aspx nothing with a
variable speed though. They do show a polisher on that site. Again I have
used many hand held or Snag grinders, none with variable speed, though they
may exist. I work on boats a little more than once a year by the way.
"Bobsprit" wrote in message
...
Bob, I am a tinsmith and use these tools every day. A grinder has the
lowest
speeds you state, and are way to fast for polishing, They also use a much
higher amperage draw than a polisher and will not slow as a polisher will
with pressure. They do not have a variable speed range and will burn
through any gell coat at their rated speeds, read the can a can of
compound
from any reputible manufacturer such as 3M or Norton.

Yes, indeed, you ARE busted. My B&D Grinder and several other's I've seen
ARE
VARIABLE. Some DO have variable speed. One of the Porter Cable units I
used to
use was also variable. Mine goes down to 2500 RPM, though I use higher RPM
during jobs.

http://www.powertoolservices.com/too...on/6154-70.htm

Meanwhile 3M suggests a max RPM of 3000 RPM, but you can safely exceed
that by
a good margin. We certainly haven't damaged any hulls using the B&D.
Meanwhile
I've never used ANY grinder that didn't slow down quite a bit with a big
polish
pad on it and under load.
Stop talking about stuff you don't know about. I actually work on boats
every
year.

RB

12v drills
 

By the way , do you own one of those Milwaukee grinders?
"Bobsprit" wrote in message
...
Bob, I am a tinsmith and use these tools every day. A grinder has the
lowest
speeds you state, and are way to fast for polishing, They also use a much
higher amperage draw than a polisher and will not slow as a polisher will
with pressure. They do not have a variable speed range and will burn
through any gell coat at their rated speeds, read the can a can of
compound
from any reputible manufacturer such as 3M or Norton.

Yes, indeed, you ARE busted. My B&D Grinder and several other's I've seen
ARE
VARIABLE. Some DO have variable speed. One of the Porter Cable units I
used to
use was also variable. Mine goes down to 2500 RPM, though I use higher RPM
during jobs.

http://www.powertoolservices.com/too...on/6154-70.htm

Meanwhile 3M suggests a max RPM of 3000 RPM, but you can safely exceed
that by
a good margin. We certainly haven't damaged any hulls using the B&D.
Meanwhile
I've never used ANY grinder that didn't slow down quite a bit with a big
polish
pad on it and under load.
Stop talking about stuff you don't know about. I actually work on boats
every
year.

RB

12v drills
 

To this I would have to agree
"DSK" wrote in message
...
"Capt. Mooron" wrote:

Poor Bob thinks you can use a grinder as a polisher.... Look again!

Sure, you can use a grinder as a polisher... as long as you either
don't mind the surface looking ground rather than polished, or if
you're too stupid to know the difference. Guess which applies to
Bubbles? Don't forget, he's nuts!

DSK

12v drills
 

The only thing you can be certain of is that Bob has no grinder.... as well
as no clue about tools.

CM


"Thom Stewart" wrote in message
...
| CM,
|
| Nutsy has just stated that his B&D Pro Grinder is AC. He didn't say why
| he can't photograph it. You don't suppose he is afraid to take a picture
| of it because his camera is DC do you. He admitts to very basic
| electonic knowledge
|
| Guess this isn't a Bust only maybe a BENT.
|
| OT
|

12v drills
 

Don't bother, if you can't tell the difference between a grinder and a
polisher it would be extreme overkill to use my skills on your boat.
"Bobsprit" wrote in message
...
I am the guy you see using these tools every day to
remove/clean up welds and prepare steel surfaces.


Great. I'll look for some steel surfaces on my boat and call you if I find
any
that need work!

Bwahahahaha!

RB

12v drills
 

You pay attention! We're talking Battery Power.


Battery powered grinders? Nope. We were never talking about that. You're off
topic.

RB

12v drills
 

By the way , do you own one of those Milwaukee grinders?

Nope. I've been using the B&D for years. It gets borrowed a lot. I've replaced
the brushes and that's it.

RB

12v drills
 

Bobsprit wrote:

expert. I only proved Marty
wrong about the power adapter, and he's trying to twist the thread into a new
topic.

The only thing you have proved, once again, is that you are a liar. You do obfuscate
with a modicum of alacrity though. As usual, as soon as your massive ignorance
is exposed you accuse others of 'twisting the thread' and scream 'I win'.

Now you can prove me wrong, just post the exact words I used about the adapter
from crap shack about which I was wrong.

You know Bob, If you'd open up your mind a bit and stop posturing you could
learn a lot from this group, there's no shame in ignorance, you can learn,
unfounded arrogance and braggadocio is however a different matter.

Cheers
Marty

12v drills
 

Donal wrote:




V=IR!



We who 'do' electronics for a living tend to use 'E' rather
than 'V', P=(I**2)R for example. I think the physics boys
like 'V', is that right Jonathon?

Cheers
Marty

12v drills
 

MC wrote:

You don't know how to wire and solder a plug? You can get them
radioshack...



There are a couple of problems here MC, number one; does the
drill in question actually have a jack or does it use a removable
battery pack that plugs into a separate charger?

If it is the latter then a small inverter is going to be the
easiest solution to implement.

If the former, then you may have other problems; does the drill
contain charge control circuitry, or is it going to be necessary
to make some sort external controller, or should you just put in
a current limiting resister and take a chance on frying or drastically
shorting the life of the batteries?

Cheers
Marty