Thread #2976914
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Why do chainsaw chaps work against cordless saws but not corded ones? I understood that they don't work on corded because of the increased torque of the electric motor, but why do they then work on the brushless battery saws that have even more?
+Showing all 9 replies.
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>gas engine can stall and has clutch that can slip
>Cordless has no clutch but can stall from over current by the computer shutting off the motor to not melt windings
>Corded also has no clutch and 99% of the time is just a dumb trigger switch and motor with no brains so at stall it'll just pull ridiculous current to keep from stalling making it harder to actually fully stall
Idfk but that's my guess
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>>2976914
I have a cordless battery saw. It has some built-in security device that shuts the saw when the chain gets stuck
The corded one will probably keep going and going and going, until your leg drops off
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>>2976967
>>2977374

Yeah this is probably it. I wish they would make a brushless corded safety featured chainsaw, ultimate homeowner/storm cleanup machine to do 80% of the work.
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>>2977515

There is a reason they don't.
A Brushless AC power tool requires you to convert the AC into DC, then back into AC the motor can use. It's a lot of electronics. Trying to shove all that in a power tool you have to carry around, and is expected to be dropped, kicked, beat to shit, etc is asking for both high failure rates and a lot of angry owners not to mention it would be quite hefty. Battery gets away with it as you already have DC and are just making it into AC through the motor controller. Plus AC only motors are very simple,robust, and cheap to make.
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>>2976967
>gas engine can stall
This. Chainsaw chaps are made of the same fibers as a bulletproof vest, but with a loose weave. The saw pulls fibers out and they wrap around the drive sprocket and slow it down enough to stall.

I saw a cool demonstration of this when I trained as a wildlands firefighter. They had some chaps that were retired because they got oil on them. They laid three chaps over a ham, revved the saw to full power, and slammed it down on the ham from overhead, Texas Chainsaw Massacre style. It cut through the chaps and about 1/4 inch into the ham before it stalled.
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>>2978211
>three chaps
*the chaps, just one layer
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https://www.youtube.com/watch?v=J7HS5EclIaw
dudes used to run an 090 all day on cigarettes and black coffee but nowadays theyre too skireet to trim the rhodies in the front yard with a glorified ronco power carving knife
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The idea is that the kevlar puts up enough resistance to cause the chainsaw to stall.
All chainsaws SHOULD have a safety shutoff if they stall, if only to prevent abuse of the tool which would damage it.

But even if your chainsaw doesn't stall, hits your leg, keeps running, I'd put it to you that the kevlar would still be the difference between a serious cut, and a fatal injury.

Same issue with angle grinders, corded ones can run even if the disk is totally jammed, hence rip into anything they get tangled in. These are very dangerous tools.

I've never cut into my chaps, but then... there's a strong correlation between people who care enough about safety to wear them, and people who care enough to use a chainsaw safety. The idiots who really need chaps are also the idiots who don't think they need chaps.
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>>2978224
Workers in the past often died on site or were taken out of the work force by crippling injury. This notion that workers in the past were tougher is just not true. They worked in worse conditions, people too stupid to work safely were often the first to be hired, they didn't do better work they were just flogged until they were injured or quit.

In historical texts it's frequently noted that certain details are reserved for desperadoes, nobody could work in them long term, men were typically forced into them by debt. These weren't tough men, they were desperate, and often had no trades skills whatsoever.

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