Hi, this is Hilto from All State Trailer Spares. Explaining to you the different types of springs.
I want to take you through the two main springs we use. One is called a slipper spring. The other is called a shackle spring or eye to eye. The difference being this. This slipper spring is attached to the chassis.
And you'll notice this end here. It slips on a wear plate. So that when you get weight on it, it slips along. Whereas this one, this is a shackle spring. We call it either a shackle spring or an IDY. It's attached here firmly. And it runs on some shackle plates which I'll show you shortly. First of all, we use what we call a front hanger.
And this is um, welded. This is welded to the frame. You must always weld it along the frame, never weld across the frame, always along the frame. So that sits there, bolts in there, nice and firmly, nice and, uh, fixture. And then we use, on the other end, we call this a dumbjack. I don't know why we call it a dumbjack, but we do.
And this is, this dumbjack's welded on, uh, to the chassis, and it sits like this. One of the important things, you'll see a lot of people who set up an I to I spring and they set it up like this. This is terribly wrong because what happens when the weight comes up, it can actually snap the spring. So you must set it back this way.
We use a measurement of 17 mil from center to center. So you set it up like this so when the weight of the trailer comes on, this will actually come up here. and then allows for the spring to move, um, so that it doesn't break the spring. Uh, this is a very, very important measurement for us and all our trailers are built like this.
We've talked about the slipper spring. We've talked about the I to Y or shackle spring. Now we want to talk about the rocker spring. The reason it's called the rocker is because this here rocks and it becomes an independent, uh, suspension. So what we do is we, we, uh, once again have a front hanger here, which is welded to the chassis, a front hanger, a back hanger here, which is welded to the chassis where the spring is locked on.
And in the center, we weld this onto the chassis here, this piece here. And then you have the setup as a rocker. And what happens again, once again, we use, Bullseye Trailer Spares. We use a 17 mil off center here. So when the weight goes up, this allows the shackle plate to come forward. And what happens in effect that this, when you, your trailer goes down a ledge, this goes up and this goes down.
That means that all the axles are on the ground at all times. And that's why we call it a rocker spring. The next set of springs we want to talk about is the slipper rocker. You don't see a lot of them in Australia. Here at ASTSS we carry different types of springs for different functions and this one is a slipper rocker.
They can come in 1500 kilos, 2000 kilos, three ton. This here is quite a big one. Now what happens with this, once again you have The center hanger that rocks, I can't show you here, but this rocks up and down like this. And because it's a slipper, you'll notice that we've got an angle coming down here. So if people back, back, and hit a stump with the axle, it can't come off.
So this here comes up, you set it up, very simple, sets it up right here, like this. And then, what happens is this is welded to the chassis. The front hang is welded to the chassis. And then all it does is slips. So we, that's why we call it a slipper rocker box. Because it's once again an independent suspension.
Very important to make sure you weld along the frame. Not across the frame. Very, very important. And then this then becomes a slipper rocker box. It becomes an independent suspension as well. Bringing to your attention the off road spring. Here also at Trailer Spares we have a 7 leaf off leaf spring, an 8 leaf and a 9 leaf for different configurations.
Very simple to fit. Here you have the front hangers already put on the spring, so you weld it on the chassis, you set it up where you want it to be, and you weld this, and all you have to do is set this back here, 17mm centre to centre, weld this on the frame, and you're set, ready to go. It's a very easy job.
Good spring, a very simple method in order to give you, once again, an independent suspension that moves. You'll notice we have grease nipples on the outside, so you can grease them and keep them, keep all the dust out, so it doesn't clog up. And, uh, these are an extremely good, strong, and a very reliable spring.
This is Hilto, signing off from All State Trailer Spares.