How To Tell You've Got An SG51

Electrode screws into the torch
Tip sits on the swirl ring
Tip does not screw into the torch
Retaining cup holds everything together

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✓ SG51 IDENTIFIED

Need Consumables?

10 x SG51 Cutting Tips
10 x SG51 Electrodes
1 x SG51 Swirl Ring
1 x SG51 Retaining Cup

Buy SG51 Consumables →

Shipped from New Zealand

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⌕ SG51 TORCH IDENTIFICATION

SG51 Plasma Consumables

If your electrode screws into the torch, but the cutting tip does not screw in, you're probably looking at an SG51 torch. The tip sits on the ceramic swirl ring and the outer cup holds everything together.

Quick check:

The electrode screws into the torch head
The cutting tip does not screw in
The tip sits on the ceramic / swirl ring
The ceramic cup screws over the front

Not your torch?

If the cutting tip screws into the torch, you probably have an AG60 torch instead.

Compare With AG60 →

▶ Watch: SG51 Torch Identification

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You pull your torch apart

Have a look inside

The electrode screws in

But the tip doesn’t

It just sits there

And the ceramic cup holds it all together

👉 that’s your torch — you’re looking for the right plasma cutter consumables

Here’s where people get confused

At first glance

These can look very similar to AG60 torches

Both have parts that screw in

Both look like they should be the same

But they’re not

With an AG60

The tip screws in

With this

The tip does NOT screw in

It just sits on the ceramic

That’s the difference

And if you don’t look properly

It’s easy to get it wrong

Quick way to check

Take the front off

Look at the tip

If it threads in → not this

If it just sits there → this is what you’ve got

Compare it to the photos below

Have a proper look at the SG51 consumables shown below

Compare them to what you’ve got in your hand

If it matches

You’re on the right track

How this one’s set up

The electrode screws into the torch

Then there’s a larger ceramic ring

That’s the swirl ring

The cutting tip sits on top of that

It does NOT screw in

Then the ceramic cup goes over everything

And screws into the torch head

That’s what holds it all together

Why this matters

If you try screw the tip in

It won’t work

If you get the wrong consumables

The torch won’t work at all

Doesn’t have to be much different

Even slightly wrong

And it just won’t run properly

Parts won’t sit right

Arc won’t behave

Or it won’t fire properly

What these are used for

These are smaller torches

General workshop jobs

Light to medium cutting

Nothing too heavy

What wears out

Tip goes first

Cut gets messy

Electrode wears back

You’ll see it

Because everything stacks together

If one part is off

It affects the whole setup

What I do

Tip and electrode together

Every time

Where people go wrong buying these

This is where most people get caught

They look at it

Think it’s close enough

And order AG60 parts

Because they look similar

Then nothing works

Tip doesn’t sit right

Parts don’t line up

Torch won’t run

That’s because the setup is different

Even if it looks close

👉 If you’re trying to understand how these torches actually fire and behave, this guide on pilot arc plasma cutters explained breaks it down

What actually matters

Don’t go off brand names

Don’t go off colour

Look at how it’s built

If:

● electrode screws in

● tip sits on ceramic

● cup holds it all together

That’s what you match

Doesn’t match this? Check this

If the tip screws in → AG60

If everything pushes in → PT31

If it’s bigger/high amp → P80

Quick answers

Does the tip screw in?

Why does it look like AG60?

Because parts screw in — but not the tip

Why won’t wrong parts work?

Because everything has to stack correctly

Can I replace one part?

You can — but both works better

Do they all look the same?

No — different outside, same setup inside

Final check

Pull it apart

Look at how it sits

Compare it properly