Let's take a look at the Aldi angle grinder and this is interesting because it's the 40 volt version and this battery pack that they sell is suitable for 20 volt and 40 volt devices. And if you look at the five connections at the end, you've got one marked T and ID. Actually, there's two stack terminals there and it's got B1 minus, B2 minus, and B1 plus and B two plus. So it's basically treating as two separate 20 volt batteries inside this one pack.

when I plug it in and this is where there's going to be some noise. but I won't do too much noise because I can't really do it here I'd like to demonstrate this angle grinding, but it's not practical where I am at the moment. If I push the trigger in here, it's got a little slide up thing here. Uh, let me just push it at the bottom and then you push it up.

it starts ramping up. It doesn't doesn't go out to fill now. I'll take it off camera for this just because it's quite noisy. So what you heard there was it just basically making the usual rattling noise that these things tend to make, but it ramped up slowly.

That suggests, well, there is electronic circuitry in here. so let's unclip the battery first and we'll pop it open. The battery has a little battery indicator in there and it's got two yellow LEDs and then this thing pops out the load. Click.

After a while, there it goes. It kind of is a bit strange. let's start taking this to bits. So I'm going to take the this is the lock button here.

This is the disk that holds your disk in and then once you've removed that, this lifts off. This which can click into various positions should come out if I remove this Jesus clip from here so cold because it usually goes Jesus and it flash across the room. Oh and I'm gonna guess there's barbarians and springs involved here. There are ball bearings and springs involved here.

Oh, they're punched in though so they can't escape, right? Okay, that's useful so that's going to make this a bit smaller for our exploration. Let's see if I can get grease all over the bench. Well, even more grease all over the bench. So the first thing I'm taking apart here is I'm taking these screws out because this looks like an electronic access compartment which is going to give access to, well, the electronics.

I'm gonna guess the motors probably occupying this area. all there stuff that deals with the battery in there, but we'll find out. Nope. So that's those screws out.

I shall swap to a thinner driver for these ones I should have got a 20 volt tool as well because I want to see if it does actually try to wire the batteries in parallel? Um, which I'd expect it to do, but you couldn't just bang them in parallel in case they're out of balance. I Don't know how these things are. Maybe I shall buy one of those tools so this is coming off revealing revealing a micro switch. Oh right, that comes off as well.

Too hot since I'm taking this to bits and I Kind of want to see what there's a mosfet that is controlling this that is dealing with the ramping. Is this? literally it can make controller perhaps or is a dedicated chip? They've covered it in something that feels almost like a hard, dry, silicony. It's not, as usual, as sticky as the usual stuff. Uh, right.

Say what? I'm interested in a circuit board I'm interested in this Keeping this whole base off here. I Wonder if this is a universal bit that goes on to others, right? Tell you what? Tell you what? Where is a pair of snips? There is a pair of snips let's knit. I shall sniff in a way that it could go back together if needs to be. Well, that's very manageable.

And there's also a little uh, combo suppression chalk I could want to filter down here leading to the motor. Interesting. Literally, just about seven turns around a core. Not much to see here.

there's the feed out the motion. There is a Freewheel diode across it to protect the mosfet against damage. Hmm. interesting.

This is worthy of exploration. Right out of the way goes that. What have we got here we have. Let's take the gearbox off.

let's switch back to the big screws again. Actually, I may have to take this one off first. I will take the front off it, right? Okay, Big Screwdriver, It's not going to be up to the same class as Eve's Bolter tear Downs Besides those are a Board of Limb 2 reviews. This is actually uh, well.

it cost me a tenor and you think, well, that seems cheaper and the shop it said been reduced to uh 20 pounds 19.99 but it went through as nine pounds nineteen. That's nice I like it when it does that way. I do like it when it goes through the other way and you end up being charged more and that makes us a perfect candidate for being stripped apart to, uh, explore the circuitry if I take that module over there the Electronic Module back to my normal bench. Uh, it will just be easier to do a more detailed analysis of it and compare it to what's in the battery and what's in the charger, right? Okay, so here's the first bit's coming off.

Uh, big. Well, I mean it's really not much. Is there any other gearing in here? Quite a lot of grease that is going to make a mess. There is a the first bit.

it's the right angle Drive thingy cogwheel thing. the eve can fill in the details. he he knows what that is. there's probably a name for it.

the right angle. the drive. you guys probably know what the name of the right angle. Drive is, but right now that is escaping me as often happens under the pressure of making a video I shall try and stay in shot.

That would be quite helpful wouldn't it am I even recording yes I am. This is good. Currently at six minutes and 16 seconds, that's not bad to be so far into it by that time. I'll try not to Waffle too much because you know that just does eat time.

So now we're going into motor territory. So when I take this off, what are we going to see? Are we going to see further viewing? or is it pretty much direct drive? I Can see a fan? Oh I can see a pig fat motor. any other gearing. This magnet here is just like not even wanted to come off.

It's off and there is the rotor with its. uh, it's A. It's not a brushless. there's the bearing in there.

and there's this split ring commutated. Well actually it's not a split ring cut. Is it split ring commutator? Uh, it's a commutator. I'm trying to think no, it's that.

it is split ring coming. You tutor has a push to the two concentric ring which was I was thinking of which this isn't which doesn't even make sense. Uh, why is this not coming out? Why is this not coming out? It has been locked in with something. There's a little plastic cone, there's a fan, so this is actually there's not much to see.

Anyway, it is direct drive. I'm guessing that this other little Jesus clip in here. If that was removed, then the bearing would pop off the end there and then the shaft would come out. Shaft uh, right.

So there's not really much to be gained from that. I Mean that's ultimately it. It's a motor with a direct drive onto the side of this that then drives onto the uh. the disc.

So not hugely complicated. This is all the gearing you're getting slabbered with grease. What's this button? This button is pushing that little pin in and that little pin that locks the disc is going into one of these four indents. That's it.

It's really, very, very simple inside. Why is this a purple? It doesn't look like new dim um Boron magnets. It looks like standard ferrity ones, but it is extremely powerful to get off that hold on. I'm going to touch it with my it doesn't feel that perfect.

I Think it's just the sheer size of it. It's a very basic motor, but that is it. I Don't think there's much more to say about this. It's a motor.

The exciting bit is what's on the circuit board and this has to be analyzed more and that will be happening in a different video where I can actually get more into it in Greater detail. I Don't even think that uh, removing this screw is going to help because I think these contacts may be molded in I should remove that screw though. just uh, just in case with the wrong size of screwdriver but that's never stopped before I wonder if this is actually placed in yeah, and then it's soldered on so these are going to have to be desoldered to take this out I think I don't want to. The only thing I can grip it here is with the mosfet and that's not really a great idea or it could have been Igvt.

final I Think it's going to be a mosfet though, but that's it. That is what is inside your very affordable 40 volt. um Lithium powered angle grinder from Aldi Um. Interesting.

Well worth opening, well worth exploring. and uh, and I'm going to take the electronics apart I'm going to analyze this more in another video, but this was purely the mechanical aspect.