I have a set of 18-volt cordless DeWalt power tools that I got about 3
years ago. Since I use them rather infrequently, I'm not getting the
lifetime out of the very expensive batteries that I would like. The
set originally had two batteries, but both have since quit working.
I have one replacement battery now, and it seems to be less able to
hold a charge as time goes on.
DeWalt apparently does not make an AC to DC converter that would be
able to power these tools with a cord. This is unfortunate because
it's a pain to have to stop work while the battery recharges. I
presume they don't offer this product because it would eat into their
very lucrative battery business... understandable.
Does anyone know if there is a third-party that makes a corded power
attachment for cordless tools?
Thanks,
Guy
--
Guy Berthiaume
"With, without,
And who'll deny,
It's what the fighting's all about."
- Roger Waters
> Does anyone know if there is a third-party that makes a corded power
> attachment for cordless tools?
I don't know about a third party, but Dewalt makes a product that
would suit you very well. It's about $45, which would be less than
the price of a new battery, and it will actually give you much better
performance than your current setup. See:
http://www.toolking.com/productinfo.aspx?cid=84&productid=3397
(If the link doesn't work, search for Dewalt item # D21008K)
I actually own one of these products (got mine for maybe $35 on eBay),
and I've been very happy with it - highly recommended.
Andy
I also needed a new Dewalt battery, tho mine was a 14.4V. 89 bucks was
the best i could find, or 50 for a used one on Ebay. Then I found a
rebuilded. I got a new 2100Mh 14.4v battery core shipped to me for 39
bucks. I just have to put it in the old case and make 2 solder
connections. If you can afford the time to ship him your old battery,
he will do it for the same cost.
http://www.wcbatteryrebuilders.com/
they are is California.
On Mar 9, 9:24 am, "Leon" <[email protected]> wrote:
> "patrick mitchel" <[email protected]> wrote in message
>
> news:[email protected]...
>
> > If yer close to a home depot, you can buy the ryobi packs, gut the cells
> > from it (they are the same size) and build yer own packs. I've even seen
> > replacement packs for no name drills at big lots (a US closeout retailer)
> > that use the same size cells. Though they are of lesser capacity and
> > quality than the brand named packs....
> > Pat
>
> With the assumption that the cells of the cheaper brands are of similar
> quality, go to Harbor Freight or Sears or Northern Tool and buy a $15.00 18
> volt battery pack and use those cells.
>
> http://www.northerntool.com/webapp/wcs/stores/servlet/product_6970_20...
>
> http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=93655
>
> http://www.sears.com/sr/javasr/product.do?pid=00911378000&vertical=Se...
I did this with a B&D Firestorm 12V pack and swapped it into a spare
DeWalt 12V pack with dead cells. I was a $10 closeout at Target, so it
was worth the cost.
The resulting battery works well enough, I guess. In my opinion the
$50-60 spent on a replacement XRP batery is worth the additional
expense. The XRP battery runs more powerfully for a much longer time.
Honstly, I'd look into just sending your old batteries in to one of
the online battery shops. One was linked here last week where they'll
actually upgrade your batteries to Lithium Ion cells for a modest
inprovement in cost.
So in my opinion, you're better off keeping your kit and saving
yourself a lot of wasted time and money and just buy some replacement
batteries. If you're interested in recycling and not buying new, look
into getting your batteries refurbished at a local battery shop or
look up that site mentioned here a week or so ago.
-Nathan
On Mar 8, 8:26 pm, "WoodButcher" <[email protected]> wrote:
> Think about this before you spend time and $$ on this project.
> If a 115V drill pulls 6A, then your 18V drill will pull about 38A
> for the same power levels. This will take at least 6ga wire to connect
> your power supply to the drill. Do you want to deal with the weight
> and inflexibility of this cable?
>
> An alternative would be to design the converter/power supply to fit
> into the battery case and run a regular power cord to the wall.
>
> Art
I find it hard to believe that a cordless battery pulls 38 amps. If
you take one apart, I doubt that they have 6 gauge wire inside. I'm
certainly not an expert, but that seems fishy. (I doubt the battery
pack can supply 38 amps )
On Mar 9, 12:41 pm, "Leon" <[email protected]> wrote:
> "N Hurst" <[email protected]> wrote in message
>
> news:[email protected]...
>
>
>
> > I did this with a B&D Firestorm 12V pack and swapped it into a spare
> > DeWalt 12V pack with dead cells. I was a $10 closeout at Target, so it
> > was worth the cost.
>
> > The resulting battery works well enough, I guess. In my opinion the
> > $50-60 spent on a replacement XRP batery is worth the additional
> > expense. The XRP battery runs more powerfully for a much longer time.
>
> I have heard also, and it does make sense, that the OEM batteries at the
> Borgs are probably not too good to buy. As most wait to buy 2 replacements
> and then end up spending a few dollars more for a completely brand new set
> up the single replacement batteries tend to set on display for years. The
> shelf life tends to lessen and the batteries tend to not last as long. This
> happened to me with some Panasonic batteries several years ago.
>
>
>
> > Honstly, I'd look into just sending your old batteries in to one of
> > the online battery shops. One was linked here last week where they'll
> > actually upgrade your batteries to Lithium Ion cells for a modest
> > inprovement in cost.
>
> Agreed, however can you charge a lithium battery in a NiCd or MiMd charger?
I have no clue, honestly! When I need to get a new battery for my
drill I'll be sure and research that. :-)
-Nathan
I think the trick setup would be to build a battery belt. This way
you could put all the weight of the tool around your waist and still
have the convienence and portability of battery power but use higher
capicity D sized cells instead of the usual "sub C" cells. I have
taken apart my dead Dewalt battery and it has thin bus bars welded
between the batteries and a wire no more than 16 gauge from the last
cell back to the power connector. A coiled telephone cord would be to
light but if you could find a coiled 16 gauge cord this would be
perfect.
I have known a couple of professional photographers that have worn
battery belts or battery vests to power their cameras and get decent
recycle time on their high power flashes.
CW wrote:
> The problem in both cases is going to be the transformer. To handle amps
> like that, it is going to be WAY to big to fit in the tool and way to
> expensive to be practicle.
For this sort of application you don't need a big linear-type supply.
The motor doesn't really care about noisy power, so it would probably be
possible to fit a switching supply into there.
However, one that can provide almost 40A at 18V isn't going to be common
or cheap.
Chris
On Wed, 7 Mar 2007 20:17:23 -0800, "WoodButcher" <[email protected]>
wrote:
>
>"Guy Berthiaume" <heyyou@no_spammers.com> wrote in message
>news:[email protected]...
><snip>
>> I presume they don't offer this product because it would eat into their
>>very lucrative battery business... understandable.
>>
>> Does anyone know if there is a third-party that makes a corded power
>> attachment for cordless tools?
>
>The battery business *is* very profitable and the manufacturers have locked
>out 3rd parties by patenting the battery - drill interface/connection. This is
>why you don't find 3rd party batteries either. They can't stop you from
>getting your battery packs rebuilt, but by welding the cases together some
>manufacturers make it more difficult.
>
>I know it ain't a Dewalt but Ryobi is the only one who I'm aware of who
>makes a corded 3/8" drill with a clutch. For infrequent use it may do ok.
>http://www.amazon.com/Ryobi-Clutch-Driver-Factory-Reconditioned/dp/B000FKIWD2
>
>Art
>
The problem that I have is that I have a set of DeWalt tools: Hammer
Drill, Jig Saw, Circular Saw, Reciprocating Saw, and Worklight.
It sounds like I am going to have to design my own converter. I can
take a dead battery, remove the cells, and connect it to an 18 volt
power supply. I was hoping someone had already done this, so I
wouldn't have to think about it.
Oh well, this is a hobby for me so I might as well take the time...
Thanks for your responses. At least now I know what direction to go.
Guy
--
Guy Berthiaume
"With, without,
And who'll deny,
It's what the fighting's all about."
- Roger Waters
On Thu, 08 Mar 2007 23:02:59 -0600, Chris Friesen
<[email protected]> wrote:
>CW wrote:
>
>> The problem in both cases is going to be the transformer. To handle amps
>> like that, it is going to be WAY to big to fit in the tool and way to
>> expensive to be practicle.
>
>For this sort of application you don't need a big linear-type supply.
>The motor doesn't really care about noisy power, so it would probably be
>possible to fit a switching supply into there.
>
>However, one that can provide almost 40A at 18V isn't going to be common
>or cheap.
The 38 amps came from assuming the motor was drawing equivalent to a 6
amp corded drill. A 6 amp is toward the beefy end of the corded
spectrum. My milwaukee 1/2" is 5.5 and my ryobi 3/8" is 4.5 amps. So
I think you're looking at less than 30 amps at 18V. I should think
you'd want to know what the actual draw is for all of the tools you
plan on using it with, and hopefully the supply has an overload
protection so you don't blow it out.
-Leuf
On Thu, 8 Mar 2007 17:26:31 -0800, "WoodButcher" <[email protected]>
wrote:
>Think about this before you spend time and $$ on this project.
>If a 115V drill pulls 6A, then your 18V drill will pull about 38A
>for the same power levels. This will take at least 6ga wire to connect
>your power supply to the drill. Do you want to deal with the weight
>and inflexibility of this cable?
>
>An alternative would be to design the converter/power supply to fit
>into the battery case and run a regular power cord to the wall.
>
>Art
>
I actually didn't expect this conversation to go into the design
issues I might face. But, if you guys are willing to discuss this,
then I am more than happy to get your help.
Part of this project will be to determine the battery specs. DeWalt
has chosen not to publish specs on the batteries or the tools that use
them (at least any that I can find). I can find neither current
ratings nor horsepower ratings.
From my experimentation so far I have found the Equivalent Series
Resistance (ESR) of my remaining battery is about 0.2 ohms. This
puts the short-circuit current at about 90 Amps. Assuming a stalled
motor has an impedance of 1 ohm (a big assumption right now), then the
peak current under worst-case conditions is around 15 Amps.
Under normal load conditions, I would expect half that value. A
switching power supply with a peak output of 15 Amps and continuous
output of 8 Amps should suffice. That translates into a supply that
can handle 144 W continuous, and 270 W peak. That will be a hefty
supply. 270W is equal to about 1/3 HP.
The other issue is that most switching supplies have over-current
protection which could cause the tool to stop/start in rapid
succession if the supply can't handle the peak current demand. I
would expect that to have an adverse effect on the item being worked.
I actually have several small 18 V supplies that I can parallel for
combined output of 225 W max. This doesn't fit the exact
requirements, but it will be good enough for an experiment.
Guy
--
Guy Berthiaume
"With, without,
And who'll deny,
It's what the fighting's all about."
- Roger Waters
"Oughtsix" <[email protected]> wrote in message
news:[email protected]...
>I think the trick setup would be to build a battery belt. This way
> you could put all the weight of the tool around your waist and still
> have the convienence and portability of battery power but use higher
> capicity D sized cells instead of the usual "sub C" cells. I have
> taken apart my dead Dewalt battery and it has thin bus bars welded
> between the batteries and a wire no more than 16 gauge from the last
> cell back to the power connector. A coiled telephone cord would be to
> light but if you could find a coiled 16 gauge cord this would be
> perfect.
>
> I have known a couple of professional photographers that have worn
> battery belts or battery vests to power their cameras and get decent
> recycle time on their high power flashes.
>
>
IIRC Hitachi or Makita offered the remote battery belt 2 or 3 years ago,
they may still offer it.
"Guy Berthiaume" <heyyou@no_spammers.com> wrote in message
news:[email protected]...
> On Wed, 7 Mar 2007 20:17:23 -0800, "WoodButcher" <[email protected]>
> wrote:
>
<snip>
>
> It sounds like I am going to have to design my own converter. I can
> take a dead battery, remove the cells, and connect it to an 18 volt
> power supply. I was hoping someone had already done this, so I
> wouldn't have to think about it.
>
Think about this before you spend time and $$ on this project.
If a 115V drill pulls 6A, then your 18V drill will pull about 38A
for the same power levels. This will take at least 6ga wire to connect
your power supply to the drill. Do you want to deal with the weight
and inflexibility of this cable?
An alternative would be to design the converter/power supply to fit
into the battery case and run a regular power cord to the wall.
Art
"N Hurst" <[email protected]> wrote in message
news:[email protected]...
>
>
> I did this with a B&D Firestorm 12V pack and swapped it into a spare
> DeWalt 12V pack with dead cells. I was a $10 closeout at Target, so it
> was worth the cost.
>
> The resulting battery works well enough, I guess. In my opinion the
> $50-60 spent on a replacement XRP batery is worth the additional
> expense. The XRP battery runs more powerfully for a much longer time.
I have heard also, and it does make sense, that the OEM batteries at the
Borgs are probably not too good to buy. As most wait to buy 2 replacements
and then end up spending a few dollars more for a completely brand new set
up the single replacement batteries tend to set on display for years. The
shelf life tends to lessen and the batteries tend to not last as long. This
happened to me with some Panasonic batteries several years ago.
>
> Honstly, I'd look into just sending your old batteries in to one of
> the online battery shops. One was linked here last week where they'll
> actually upgrade your batteries to Lithium Ion cells for a modest
> inprovement in cost.
Agreed, however can you charge a lithium battery in a NiCd or MiMd charger?
"WoodButcher" <[email protected]> wrote in message
news:[email protected]...
> Think about this before you spend time and $$ on this project.
> If a 115V drill pulls 6A, then your 18V drill will pull about 38A
> for the same power levels. This will take at least 6ga wire to connect
> your power supply to the drill. Do you want to deal with the weight
> and inflexibility of this cable?
>
> An alternative would be to design the converter/power supply to fit
> into the battery case and run a regular power cord to the wall.
>
> Art
>
The problem in both cases is going to be the transformer. To handle amps
like that, it is going to be WAY to big to fit in the tool and way to
expensive to be practicle. With a transformer that big and the regulator to
handle that power, I would be surprised if you could do it for less than
$400.00 to $500.00.
"B A R R Y" <[email protected]> wrote in message
news:[email protected]...
> bf wrote:
>> (I doubt the battery
>> pack can supply 38 amps )
>
> I don't.
>
> I used be heavily into competitive radio control car racing. We tried to
> set the car up to completely drain a 2000 mAH Sub-C NiCd pack in 4 minutes
> + 1 lap (about 3-4 seconds).
Yes however drills are not set up to drain batteries in 4 minutes. Many
cordless drills will work hard for hours on end.
"patrick mitchel" <[email protected]> wrote in message
news:[email protected]...
> If yer close to a home depot, you can buy the ryobi packs, gut the cells
> from it (they are the same size) and build yer own packs. I've even seen
> replacement packs for no name drills at big lots (a US closeout retailer)
> that use the same size cells. Though they are of lesser capacity and
> quality than the brand named packs....
> Pat
>
With the assumption that the cells of the cheaper brands are of similar
quality, go to Harbor Freight or Sears or Northern Tool and buy a $15.00 18
volt battery pack and use those cells.
http://www.northerntool.com/webapp/wcs/stores/servlet/product_6970_200318521_200318521
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=93655
http://www.sears.com/sr/javasr/product.do?pid=00911378000&vertical=Sears&BV_UseBVCookie=Yes
"Guy Berthiaume" <heyyou@no_spammers.com> wrote in message
news:[email protected]...
>I have a set of 18-volt cordless DeWalt power tools that I got about 3
> years ago. Since I use them rather infrequently, I'm not getting the
> lifetime out of the very expensive batteries that I would like. The
> set originally had two batteries, but both have since quit working.
> I have one replacement battery now, and it seems to be less able to
> hold a charge as time goes on.
>
> DeWalt apparently does not make an AC to DC converter that would be
> able to power these tools with a cord. This is unfortunate because
> it's a pain to have to stop work while the battery recharges. I
> presume they don't offer this product because it would eat into their
> very lucrative battery business... understandable.
>
> Does anyone know if there is a third-party that makes a corded power
> attachment for cordless tools?
Like Andy commented, a much stronger corded drill would be cheaper than an
18 volt adapter.
"bf" <[email protected]> wrote in message
news:[email protected]...
>
> I find it hard to believe that a cordless battery pulls 38 amps. If
> you take one apart, I doubt that they have 6 gauge wire inside. I'm
> certainly not an expert, but that seems fishy. (I doubt the battery
> pack can supply 38 amps )
I don't believe it either. They would get pretty hot. The drills get their
power from gear reduction.
bf wrote:
> (I doubt the battery
> pack can supply 38 amps )
I don't.
I used be heavily into competitive radio control car racing. We tried
to set the car up to completely drain a 2000 mAH Sub-C NiCd pack in 4
minutes + 1 lap (about 3-4 seconds). We used bus bars from cell to
cell, and ultra flexible 12 ga. wire, as the wires were only a few
inches long.
We tested packs @ 30-35 amp discharge rates using devices like this:
<http://www.rctech.net/reviews/review_turbo35gfx_futureal.shtml>
If the cells were matched well enough the pack would "dump", and totally
die in the space of seconds. <G>
Guy Berthiaume wrote:
> I actually didn't expect this conversation to go into the design
> issues I might face. But, if you guys are willing to discuss this,
> then I am more than happy to get your help.
>
> Part of this project will be to determine the battery specs. DeWalt
> has chosen not to publish specs on the batteries or the tools that use
> them (at least any that I can find). I can find neither current
> ratings nor horsepower ratings.
It looks like the DeWalt 18V drill currently shown on their web site is
listed at "510 Unit Watts Out"??? 510W / 18V = 28.333 Amp.
http://www.dewalt.com/us/products/tool_detail.asp?productID=15104
--
Jack Novak
Buffalo, NY - USA
[email protected]
If yer close to a home depot, you can buy the ryobi packs, gut the cells
from it (they are the same size) and build yer own packs. I've even seen
replacement packs for no name drills at big lots (a US closeout retailer)
that use the same size cells. Though they are of lesser capacity and quality
than the brand named packs....
Pat
On Sat, 10 Mar 2007 02:12:09 GMT, Nova <[email protected]> wrote:
>It looks like the DeWalt 18V drill currently shown on their web site is
>listed at "510 Unit Watts Out"??? 510W / 18V = 28.333 Amp.
>
This is not good news. If the input power to the drill is 500 W,
then it will probably not be practical to do what I am planning.
DeWalt's web site is very hit/miss with the power ratings of the
devices. It looks like most of the corded devices have power ratings
and most of the cordless devices do not, which is why I didn't see
them before. I was checking the ratings for my particular tools.
So, if I use the corded tools as a guide, and assume that the cordless
versions produce at least half the output of the corded devices, then
the power requirement goes way up... The corded circular saws are
rated above 2 KW.
I will continue with my experiment, but I'm not encouraged at this
point...
Guy
--
Guy Berthiaume
"With, without,
And who'll deny,
It's what the fighting's all about."
- Roger Waters
Seems to me I mentioned the impracticality of this venture somewhere along
the line. Hmmm...
"Guy Berthiaume" <heyyou@no_spammers.com> wrote in message
news:[email protected]...
> On Sat, 10 Mar 2007 02:12:09 GMT, Nova <[email protected]> wrote:
>
>
>
> >It looks like the DeWalt 18V drill currently shown on their web site is
> >listed at "510 Unit Watts Out"??? 510W / 18V = 28.333 Amp.
> >
>
> This is not good news. If the input power to the drill is 500 W,
> then it will probably not be practical to do what I am planning.
>
> DeWalt's web site is very hit/miss with the power ratings of the
> devices. It looks like most of the corded devices have power ratings
> and most of the cordless devices do not, which is why I didn't see
> them before. I was checking the ratings for my particular tools.
>
> So, if I use the corded tools as a guide, and assume that the cordless
> versions produce at least half the output of the corded devices, then
> the power requirement goes way up... The corded circular saws are
> rated above 2 KW.
>
> I will continue with my experiment, but I'm not encouraged at this
> point...
>
> Guy
>
> --
>
> Guy Berthiaume
>
>
> "With, without,
> And who'll deny,
> It's what the fighting's all about."
> - Roger Waters
On Wed, 7 Mar 2007 20:17:23 -0800, "WoodButcher" <[email protected]>
wrote:
>
>"Guy Berthiaume" <heyyou@no_spammers.com> wrote in message
>news:[email protected]...
><snip>
>> I presume they don't offer this product because it would eat into their
>>very lucrative battery business... understandable.
>>
>> Does anyone know if there is a third-party that makes a corded power
>> attachment for cordless tools?
>
>The battery business *is* very profitable and the manufacturers have locked
>out 3rd parties by patenting the battery - drill interface/connection. This is
>why you don't find 3rd party batteries either. They can't stop you from
>getting your battery packs rebuilt, but by welding the cases together some
>manufacturers make it more difficult.
>
>I know it ain't a Dewalt but Ryobi is the only one who I'm aware of who
>makes a corded 3/8" drill with a clutch. For infrequent use it may do ok.
>http://www.amazon.com/Ryobi-Clutch-Driver-Factory-Reconditioned/dp/B000FKIWD2
>
>Art
>
My younger received a similar Ryobi drill/driver as a wedding gift
(from someone who knew she has a "fix-it" personality).
It serves well for basic home handy-person use. I wouldn't recommend
it for installing a deck or a room of drywall, but it works OK for
hanging curtain hardware and the like.
John
"Guy Berthiaume" <heyyou@no_spammers.com> wrote in message
news:[email protected]...
<snip>
> I actually didn't expect this conversation to go into the design
> issues I might face. But, if you guys are willing to discuss this,
> then I am more than happy to get your help.
>
> Part of this project will be to determine the battery specs. DeWalt
> has chosen not to publish specs on the batteries or the tools that use
> them (at least any that I can find). I can find neither current
> ratings nor horsepower ratings.
>
> From my experimentation so far I have found the Equivalent Series
> Resistance (ESR) of my remaining battery is about 0.2 ohms. This
> puts the short-circuit current at about 90 Amps. Assuming a stalled
> motor has an impedance of 1 ohm (a big assumption right now), then the
> peak current under worst-case conditions is around 15 Amps.
>
> Under normal load conditions, I would expect half that value. A
> switching power supply with a peak output of 15 Amps and continuous
> output of 8 Amps should suffice. That translates into a supply that
> can handle 144 W continuous, and 270 W peak. That will be a hefty
> supply. 270W is equal to about 1/3 HP.
>
> The other issue is that most switching supplies have over-current
> protection which could cause the tool to stop/start in rapid
> succession if the supply can't handle the peak current demand. I
> would expect that to have an adverse effect on the item being worked.
>
> I actually have several small 18 V supplies that I can parallel for
> combined output of 225 W max. This doesn't fit the exact
> requirements, but it will be good enough for an experiment.
>
> Guy
>
I think the motor specs would be more relevant than the battery
specs. Like you stated, the battery is capable of far more amps than
the motor would ever draw. Your plan of testing with your existing
supplies is a sound one.
A switching supply is definitely the way to go. An off line switcher
running at several hundred KHz will have magnetics which are much
smaller and lighter than the cells of your current battery pack. Your
over-current concerns can be addressed by simply designing it to go
into a constant current mode instead of shutting down and restarting.
I also wouldn't bother with PFC. A non-isolated design will be more
compact and less costly than an isolated one and the drill/saw/whatnots
are usually insulated sufficiently to avoid shock, but this is a safety issue
and is your call. And finally, given the application, the ripple spec can
be relaxed or even eliminated as the motor(s) receive PWM current
supplied by the VSR electronics anyway. If your design for the
converter allows the voltage to fall to zero 120 times per second this
would be probably be unnoticeable to the user.
Art
"Leon" <[email protected]> wrote in message
news:[email protected]...
>
<snip>
>
> I don't believe it either. They would get pretty hot. The drills get their
> power from gear reduction.
>
>
If used continuously under heavy load, yes, the drill would get quite
hot. However under the intermittant loads usually applied this is not
an issue.
Torque and power are not the same thing.
Art
"CW" <[email protected]> wrote in message
news:[email protected]...
> No, the batteries don't, but the motor very well could. Rechargeable can
> put
> out an amazing amount of current. No, you won't find 6 gauge wire inside.
> You won't find wire at all. You will find sheetmetal straps connecting the
> cells.
Some of my old 9.6 volt batteries had wires in combination to the thin metal
strips, and IIRC a thin wire diode.
On Fri, 09 Mar 2007 20:25:58 GMT, "CW" <[email protected]> wrote:
>That's why he said it's understandable. "Damn sleazy" is a common business
>model.
>Free greed, it's the American way.
>
Just so you understand, I mean that I understand their profit motive.
Myself, I wouldn't go so far as to call it sleazy because I have no
way to know what issues they face in manufacturing these batteries,
but I wouldn't be surprised if they have an "embarassing" profit
margin.
Guy
--
Guy Berthiaume
"With, without,
And who'll deny,
It's what the fighting's all about."
- Roger Waters
That's why he said it's understandable. "Damn sleazy" is a common business
model.
Free greed, it's the American way.
<[email protected]> wrote in message
news:[email protected]...
> On Thu, 08 Mar 2007 01:40:13 GMT, Guy Berthiaume
> <heyyou@no_spammers.com> wrote:
>
> >
> >DeWalt apparently does not make an AC to DC converter that would be
> >able to power these tools with a cord. This is unfortunate because
> >it's a pain to have to stop work while the battery recharges. I
> >presume they don't offer this product because it would eat into their
> >very lucrative battery business... understandable.
>
> I don't know why you say its *understandable*.
>
> Its damn sleazy. They should make the batteries available for a
> reasonable price.
>
No, the batteries don't, but the motor very well could. Rechargeable can put
out an amazing amount of current. No, you won't find 6 gauge wire inside.
You won't find wire at all. You will find sheetmetal straps connecting the
cells.
"bf" <[email protected]> wrote in message
news:[email protected]...
> I find it hard to believe that a cordless battery pulls 38 amps. If
> you take one apart, I doubt that they have 6 gauge wire inside. I'm
> certainly not an expert, but that seems fishy. (I doubt the battery
> pack can supply 38 amps )
>
>
>
>
"WoodButcher" <[email protected]> wrote in message
news:[email protected]...
> "Guy Berthiaume" <heyyou@no_spammers.com> wrote in message
> news:[email protected]...
>>
>
> Think about this before you spend time and $$ on this project.
> If a 115V drill pulls 6A, then your 18V drill will pull about 38A
> for the same power levels. This will take at least 6ga wire to connect
> your power supply to the drill. Do you want to deal with the weight
> and inflexibility of this cable?
And yet a 3.5 amp battery is all that is need to power the 18 volt drill.
The 18 bolt drill does not pull very many amps at all. 18 volt drills
motors so not deliver near the power of the corded 115 volt model drills.
The 18 volt drill can deliver close to the same torque by gear reduction at
the sacrifice of chuck RPM's.
"Guy Berthiaume" <heyyou@no_spammers.com> wrote in message
news:[email protected]...
<snip>
> I presume they don't offer this product because it would eat into their
>very lucrative battery business... understandable.
>
> Does anyone know if there is a third-party that makes a corded power
> attachment for cordless tools?
The battery business *is* very profitable and the manufacturers have locked
out 3rd parties by patenting the battery - drill interface/connection. This is
why you don't find 3rd party batteries either. They can't stop you from
getting your battery packs rebuilt, but by welding the cases together some
manufacturers make it more difficult.
I know it ain't a Dewalt but Ryobi is the only one who I'm aware of who
makes a corded 3/8" drill with a clutch. For infrequent use it may do ok.
http://www.amazon.com/Ryobi-Clutch-Driver-Factory-Reconditioned/dp/B000FKIWD2
Art
On Thu, 08 Mar 2007 01:40:13 GMT, Guy Berthiaume
<heyyou@no_spammers.com> wrote:
>
>DeWalt apparently does not make an AC to DC converter that would be
>able to power these tools with a cord. This is unfortunate because
>it's a pain to have to stop work while the battery recharges. I
>presume they don't offer this product because it would eat into their
>very lucrative battery business... understandable.
I don't know why you say its *understandable*.
Its damn sleazy. They should make the batteries available for a
reasonable price.
Guy Berthiaume wrote:
> It sounds like I am going to have to design my own converter. I can
> take a dead battery, remove the cells, and connect it to an 18 volt
> power supply. I was hoping someone had already done this, so I
> wouldn't have to think about it.
I just came across an article on the web about battery to corded
conversion and immediately thought of this post. Here's the link:
http://www.instructables.com/id/ECYS82SKC6EYNDWXW6?ALLSTEPS
I heard about it through
http://makezine.com/blog/