Sydney Trains K set (HO Scale) - Free 3D Print Model

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Cyclohexane Designs

Hobby & DIY>Vehicles

IP Report

Print Profile(2)

All

P1S

P1P

X1 Carbon

H2S

P2S

H2C

X1E

H2D

H2D Pro

X2D

A2L

A1 mini

All parts

Designer

8.1 h

3 plates

5.0(6)

A1 mini profile (full size)

Designer

8.7 h

5 plates

5.0(1)

Open in Bambu Studio

Boost

199

176

Released

Description

Do you like trains, but the scale models ones cost too much? Have no fear. You can now 3D print your very own Sydney Trains K set in HO scale!

11th March 2026 update: A1 Mini Profile now available!

IMPORTANT NOTE: I designed this as a display model with a decreased part count, as a result, the wheels don't turn. There is also no interior. This model is also designed for easy printing, and therefore is not a 100% accurate model.

PS. Remixes are allowed on this model. Feel free to design an S set or C set front

How to print:

I am assuming that you want to print the full 4 car set.
Print each plate twice

A1 mini users, there is a special print profile with some parts cut down to fit on the A1 mini bed. (The model is the same size).

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Assembly:

Step 0 **Only for A1 mini users**:

Glue the side pieces together using the black tabs. Make sure to leave a small gap at the top and bottom so you can attach the roof/floor later.

**All print profiles**

Glue the “tub” to the 2 sides with superglue as shown (example with cab car)

Remember to not mix up the car types

2. Glue the rest of the bottom of the car

For the “long” end, make sure the socket is offset to the left.

Length A should be slightly shorter than length B.

3. Glue the front and back ends of the car. (example with cab car)

Remember that only the front of the cab cars have the destination board!

4. Glue the roof segments together as shown.

A1 mini users, the “long” segment is split in half.
Cab car has the universal “long” segment, plus the 3 curved ones

Non driving car has the universal “long” segment, plus 4 curved ones, plus the pantograph

The roof profile should look like this now

5. Attach the roof to the car. (glue is optional here)

The side of the roof with the aircon goes on the “long” end of the car
The roof with the pantograph goes on the non driving car

6. Glue the bogie to the pin as shown, then attach the bogies to the car WITHOUT GLUE. The bogies should pop in with a bit of effort, and be able to rotate freely.

7. Glue the couplers onto the end of the cars as shown.

Comment & Rating (41)

@peterrobin_2050

Prints really well, nice job. I have scaled up to 1:29 and am adding some more details but the dimensions are spot on.

The designer has replied

@Cyclohexane_3D

Holy moly! What do you plan on doing with it at that scale??

@peterrobin_2050

Replying to @Cyclohexane_3D :

Running it on my garden railway.

@winner_3d

Boosted

Great, realistic train! Thanks for adding the a1 mini profile.

@hotellonely

Boosted

Gotta clean up the glue residue tomorrow :)

@user_2766102264

Boosted

came out perfect. my painting skills aren’t the best, but I’m happy with how it turned out

@Daarc

50% print to N scale, turned out ok, not sure if there is more glue on the model or my fingers. I am hoping this will get me over the line to model Sydney Trains myself to hopefully get me some N scale running sets. Only starting out with my model railway. Put this along side my Kato E235 and it looks great.

@user_2216444356

can U do t set

The designer has replied

@Cyclohexane_3D

The Tangara is on my to-do list, however I am currently working on the V set. No timeframe for either, as I am currently busy with other things.

@user_2216444356

Replying to @Cyclohexane_3D :

@user_2766102264

Boosted

Replying to @Cyclohexane_3D :

OMG That would be incredible, I've been looking for a V set for so long now. Im printing this now, I hope it turns out good!

@winner_3d

Boosted

would up be able to make this model a1 mini sized

The designer has replied

@Cyclohexane_3D

I am currently making an A1 mini profile for it. Due to Makerworld's guidelines, I need to print it first, so stay tuned and it should be up in a few hours.

@winner_3d

Boosted

thanks

@Cyclohexane_3D

The A1 mini profile is up now. Hope you like it :)

@winner_3d

Boosted

could you make a a1 mini sized one, smaller

The designer has replied

@Cyclohexane_3D

You could scale it down to 50% to make an N scale model. Not 100% sure how well it it print. I will make a full size A1 mini profile if you still want it to be HO though

@winner_3d

Boosted

I use Bambu handy so there isn’t a scale down option

@user_4287038398

what if I want to have this motorized? I want more trains for my HO scale layout

@user_492223607

powered bogies available on Ali express for around $12 each. you may have to import the cabin floor into Tinkercad to make them fit.

@user_4287038398

Replying to @user_492223607 :

thanks :)

@user_4287038398

Replying to @user_492223607 :

great, thanks for the info.

@user_504355416

Will you be making any other TNSW trains as my son adores them and I love printing these out for him? TYIA

The designer has replied

@Cyclohexane_3D

I do have others planned, but there's no timeframe for when I'll do them as I am busy with uni studies. Is there any particular one they'd like to see?

@user_504355416

Replying to @Cyclohexane_3D :

He loves his Tangaras. BUT. you have uni and he is a 14yr old boy who can wait. LOL. He has printed out a few and paints his own livery on them. We are part of the South Coast model railway club and I think we were going to print out some to take down to give to kids so they can make their own. There is a huge hole in the market for people who want to make their own and not just buy pre made ones. I actually bought our 3D printer when I saw your design. Thank you. As a mum, I apricate it.