Hi guys , i have a chainsaw like this :

but i noticed that the impedance between his power cord when i push ON is 14 ohms ! so i want to know if this low resistance is normal or can be dangerous . i dont test it yet

 

That's not a chainsaw, it's an angle grinder. You are measuring resistance not impedance. They are both measured in ohms, but one is DC and the other AC.

14Ω is a totally normal resistance for a motor like that.

 

You have posted a picture of an angle grinder but you are asking about a chain saw. You give no information on the voltage and power rating so we can not check a tool with a similar rating motor. (Ideally you should compare it with another of the same model.) Series wound (Universal) motors do tend to have quite a low resistance. If it is quite a high power motor then 14 ohms is not unreasonable particularly if your mains voltage is 110 volts.

Les.

 

Fourteen ohms doesn't seem outrageously low to me.

 

Ok , i dont know what is the name of this machine , but google traduction say chain saw .
Voltage : 220 ac
Power 1010 watts .
Thanks

 

This is a chain saw --

 

Thank you dear im sorry for the error .
Voltage 220 ac
Power 1010 watts

 

I have just measured the resistance of one of my small angle grinders. It is rated at 900 Watts 230 volts. It's resistance is 11 ohms. I am pretty sure that the 14 ohms that you measured is OK. If you bought your angle grinder thinking it was a chain saw DO NOT try to use it for cutting trees.

Les.

 

You guys crack me up.

 

Ok guys , i want to use it to cut ceramic

 

For ceramic you need a diamond blade and dust mask.

 

4 1/2 inch diamond blades are available at just about all hardware stores.

Here is a diamond blade available at Lowe's Hardware store (US).

https://www.lowes.com/pd/Hitachi-4-1-2-in-Wet-Dry-Turbo-Diamond-Saw-Blade/1000216927

I'd be willing to bet you can also get them on e-Bay and Amazon as well.

OK, just did a quick Amazon search. Found https://www.amazon.com/s?k=4-1/2-in+Wet/Dry+Turbo+Diamond+Saw+Blade&ref=nb_sb_noss

 

If you bought your angle grinder thinking it was a chain saw DO NOT try to use it for cutting trees.

He could try if he got one of these -

http://katools.com/lancelot-squire-combo-kits/

 

@shortbus: I'd hate to see what happens when the TS tries one of those on ceramics. On the other hand - - - .

I modified a Biscuit Cutting blade to fit my angle grinder. It's just slightly larger than what the safety guard would allow. I seldom use it because of the extreme scary danger to my hands. Wearing gloves, the blade would quickly and easily pull my hand into the blade if ever it touched the glove. I did that once and for a single (DANGEROUS) purpose, to cut out a plastic section inside a lawn sprinkler control box (underground) so it could be made to fit. There were no market available solutions to my situation so I had to improvise. But believe me - the adrenaline was flowing the whole time.

[edit] and no, I DON'T RECOMMEND DOING AS I DID.

 

@shortbus: I'd hate to see what happens when the TS tries one of those on ceramics. On the other hand - - - .

I modified a Biscuit Cutting blade to fit my angle grinder. It's just slightly larger than what the safety guard would allow. I seldom use it because of the extreme scary danger to my hands. Wearing gloves, the blade would quickly and easily pull my hand into the blade if ever it touched the glove. I did that once and for a single (DANGEROUS) purpose, to cut out a plastic section inside a lawn sprinkler control box (underground) so it could be made to fit. There were no market available solutions to my situation so I had to improvise. But believe me - the adrenaline was flowing the whole time.

Oscillating saws are good for this sort of thing.

 

Ok , i dont know what is the name of this machine , but google traduction say chain saw .
Voltage : 220 ac
Power 1010 watts .
Thanks

@mohsen 2012 The picture you show is a high speed disc grinder.
All these power tools shown use a Universal (series field) motor.
Max.

 

Oscillating saws are good for this sort of thing.

Actually, no. The whole reason behind using a circular blade was because of the space where I needed to cut/modify. A reciprocating saw would not have fit. Not even a small jig-saw. Even cutting the material away by hand would have been next to impossible. I MIGHT have been able to use a hammer and chisel, but the plastic was pretty tough. I KNOW - I KNOW, "Plastic". Even still, chiseling out the area might have fractured the body and rendered the whole thing useless.

 

The whole point to this thread is how to cut ceramics using an angle grinder. I've used my angle grinder to cut many a ceramic tile. Even cut stone and brick using a diamond saw blade such as I linked. And the point made earlier, USE A DUST MASK!

[edit] I guess the TRUE point to this thread is whether the motor on this grinder is safe to use. The consensus is "Yes, it is safe to use." It's actually a side point about cutting ceramics.

 

And always safety glasses!
Max.

 

always safety glasses!

ABSOLUTELY!