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Old 12-05-2019, 01:43 PM   #46
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Re: Circular saw, corded or cordless?


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Then you have miracle batteries that defy the laws of physics as we currently know them. It can be very low--depending upon battery chemistry and storage temperature, but, regardless, there will be self discharge.

All batteries have a degree of self discharge--even lithium primary cells.
I am sure you're right. No energy storage is forever. My example is just that, an example. Charge indicator shows full after 4 years. Maybe it is, or maybe the indicator is giving a false reading. 4 years is a long time for a battery to stay charged. A whole lot better than Ni-cad.

I don't believe in miracles, but I do respect experience. If I wanted to find out for sure, I could run it until it is empty. Maybe take axle nuts off random cars at pull a part. Hmmmmm!
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Old 12-05-2019, 04:34 PM   #47
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Re: Circular saw, corded or cordless?


Quote: Thank a police officer for being the one who runs 'TO' a report of shots fired, while everyone else runs 'AWAY'



If they run away why would we pay them? It is their sworn duty to run to a report of shots. That's why they strap on a gun to shoot bad guys who want to kill them or others. To protect and serve. It says so on their police cars. It could very well lead to taking a bullet to protect us.
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Old 12-06-2019, 12:00 AM   #48
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Re: Circular saw, corded or cordless?


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Originally Posted by iamrfixit View Post
Which saw do you have? I have the early version 6 1/2" blade without the brushless motor and it is exactly as you describe, ok for a few 2x4s but almost useless for cutting plywood.

The brushless 7 1/4" version does offer better performance, I don't own that one, but a friend has it and I've used it. I had bought the 60v before the brushless 20v was released.

The 60v definitely has what it takes, it performs as well as any corded saw. I haven't found a job it couldn't handle with ease.
Too lazy to go to garage right now to check! But it has to be the brushless then as I know it's 7 1/4" Good to hear the 60V is maybe ok. At this point, not going to do anything until maybe next summer. I'd really like a cordless version. Lot's of convenience. Even if just taking down plywood, just easier. And if using a guide, not having the cord drag or interfere can make a difference in smoothness of cut.

Still, I'm annoyed that I basically wasted $$$ on the 20v. I'll probably try to sell it on eBay or Craigslist and get crap for it. But I'm just not using it.
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Old 12-06-2019, 12:20 AM   #49
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Re: Circular saw, corded or cordless?


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Quote: Thank a police officer for being the one who runs 'TO' a report of shots fired, while everyone else runs 'AWAY'



If they run away why would we pay them? It is their sworn duty to run to a report of shots. That's why they strap on a gun to shoot bad guys who want to kill them or others. To protect and serve. It says so on their police cars. It could very well lead to taking a bullet to protect us.
Umm, @Ruko , I think you have the wrong thread. Unless you are also wanting the police to also carry a cordless saw.
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Old 12-06-2019, 12:42 AM   #50
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Re: Circular saw, corded or cordless?


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I've seen quite a few corded electric drills blow smoke when used for mixing thinset. Low speed, high torque is the key, the opposite of drilling and driving drills.
I should have stressed in my post for corded drills, like I did for cordless drills, that you need to get a drill that is designed for mixing mud, thinset and concrete.

The one I did include reference "One of the best corded mixer drills is Rigid's 9 amp Spade handle mud mixer." did have mud mixer in it's name.

And I too have burned up a few corded drills, and drained several batteries beyond repair in cordless drills, (not my ridgids though) mixing even a small amount of thinset or grout. This was before I got my Delta spade handle mud mixer.

If I did a lot more tile work, I would get a dedicated mixer like this one from Ridgid:
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Old 12-06-2019, 06:57 AM   #51
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Re: Circular saw, corded or cordless?


That mixer looks expensive. I have an old corded 3/8" skill hand drill. It has worked great for years. Perhaps they don't make them like they used to???
Like this one. Yes I know this is the circular saw thread, this is a circular drill? Does that count??? lol


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Old 12-06-2019, 11:44 AM   #52
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Re: Circular saw, corded or cordless?


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Umm, @Ruko , I think you have the wrong thread. Unless you are also wanting the police to also carry a cordless saw.
He was quoting my signature line and clearly didn't understand it.
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Old 12-06-2019, 02:25 PM   #53
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Re: Circular saw, corded or cordless?


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Too lazy to go to garage right now to check! But it has to be the brushless then as I know it's 7 1/4" Good to hear the 60V is maybe ok. At this point, not going to do anything until maybe next summer. I'd really like a cordless version. Lot's of convenience. Even if just taking down plywood, just easier. And if using a guide, not having the cord drag or interfere can make a difference in smoothness of cut.

Still, I'm annoyed that I basically wasted $$$ on the 20v. I'll probably try to sell it on eBay or Craigslist and get crap for it. But I'm just not using it.

I don't believe dewalt made the 7-1/4" in anything but brushless, and I searched around but didn't find any. The reviews of the brushless have been pretty favorable but I haven't used that model enough to offer an opinion other than it worked better than the 6 1/2" brush model for me.

Be sure you're using the full sized battery. The compact batteries won't have enough reserve to adequately run the circular saw. The bigger the battery the better it should perform. I have 3,4,5 and 6 ah batteries, mostly the 5's. For tools like the circular saw that draw a lot of power, the higher amp hour batteries become a necessity.

Also need a good sharp blade designed for cordless, these will have a slick coating on the sides and be very thin kerf. I stick with the dewalt blades as I've always had good luck with them. Can't power through with a dull blade using cordless. The added load will really zap the power from the batteries. Not assuming either is the problem with your saw, just an observation from my usage.

The 6 1/2" brushed version I have is fine for crosscutting or light work but ripping is a little slow. Much better than the old nicad 18 or 14.4, but it could never replace a corded saw for most and certainly not me. The 60v can and it pretty much has.
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Old 12-06-2019, 09:00 PM   #54
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Re: Circular saw, corded or cordless?


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Originally Posted by iamrfixit View Post
Be sure you're using the full sized battery. The compact batteries won't have enough reserve to adequately run the circular saw. The bigger the battery the better it should perform. I have 3,4,5 and 6 ah batteries, mostly the 5's. For tools like the circular saw that draw a lot of power, the higher amp hour batteries become a necessity.
Interesting. Thanks. I'll try a larger battery and see if that works. Hadn't thought of that. I've been using one of the smaller ones just because I have a bunch of them. Maybe worth getting a larger battery because worst case, if it doesn't work better I still have a bigger battery for the other tools.
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Old 12-06-2019, 11:29 PM   #55
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Re: Circular saw, corded or cordless?


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He was quoting my signature line and clearly didn't understand it.

Do you get the point though? I think I understand as well as anyone. It's their job fcs!
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Old 12-07-2019, 04:23 PM   #56
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Re: Circular saw, corded or cordless?


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Do you get the point though? I think I understand as well as anyone. It's their job fcs!
And what is you point bringing this up in a discussion of corded vs battery tools? I suspect you are being a troll. Correction know you are being a troll.

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Old 12-12-2019, 11:33 PM   #57
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Re: Circular saw, corded or cordless?


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Originally Posted by iamrfixit View Post
Be sure you're using the full sized battery. The compact batteries won't have enough reserve to adequately run the circular saw. The bigger the battery the better it should perform.
Do you think this really makes a difference? I mean, runtime yes, but in overall performance? The amp hour rating is more like how much gas you've got in the tank than it is how many cc's your motor is. Granted, you'll get more cuts before performance starts to suffer, but it should make no difference with a fully charged battery.

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Originally Posted by iamrfixit View Post
Also need a good sharp blade designed for cordless, these will have a slick coating on the sides and be very thin kerf.
Yes. This will make a big difference. Makita came out with some blades specifically designed for cordless tools (called Max Efficiency blades) that have a slightly thinner kerf and a few other design elements to improve battery life and make cuts easier.
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Old 12-13-2019, 08:03 AM   #58
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Re: Circular saw, corded or cordless?


...and when you notice that a "kit" with drill, 2 batteries and charger costs less than 2 new batteries, check the capacity of the batteries in the kit. When they want to save a few dollars, first thing they do is decrease the number of cells in the batteries. Ask me how I know.
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Old 12-13-2019, 10:55 AM   #59
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Re: Circular saw, corded or cordless?


Being on the battery subject, this is the time to hop down to HD to get your Christmas pack of three 3.0 ah 18 v batteries that fit all lit tools for $139.....or you could pay $99 for one.....
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Old 12-13-2019, 11:32 AM   #60
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Re: Circular saw, corded or cordless?


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Do you think this really makes a difference? I mean, runtime yes, but in overall performance? The amp hour rating is more like how much gas you've got in the tank than it is how many cc's your motor is. Granted, you'll get more cuts before performance starts to suffer, but it should make no difference with a fully charged battery.

For tools like a drill, impact driver, flashlight or other tools that have a lower power draw or tools used in short bursts, no it probably won't make a lot of difference. For a tool like a circular saw that has a heavier startup draw or likely to get more sustained use it will matter. You may not really notice a big difference making a couple quick cuts, like just grabbing the saw to crosscut a couple of boards. For making numerous repeated cuts or a long rip cut on a sheet of plywood it quickly begins to matter. The smaller number of cells depletes more quickly when subjected to the constant power draw. If the fewer cells can't feed the usage quickly enough, the voltage drops off and so does the HP and torque being produced by the motor.

Using one of my 1/2" impact wrenches I can notice the performance hit even using a 3.0 versus a 5 or 6 amp hour battery. A set of lug nuts might have to hammer using the 3 amp battery but immediately spin loose on the big battery. Lots of places have a two pack of 5.0 batteries for $129-139, buying a single battery is usually just too expensive. An even better deal is to find a special where you can buy a bare tool and get a free battery thrown in with it. Those offers are pretty plentiful around this time of year.
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