Coal Train | Find the GOLD NUGGET - Free 3D Print Model

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2222pzzls

Toys & Games>Puzzles

IP Report

Print Profile(5)

All

A1 mini

P1P

X2D

H2C

H2D

P2S

X1 Carbon

H2D Pro

P1S

H2S

X1E

A2L

AMS (A1 Mini)

Designer

7 h

5 plates

5.0(3)

AMS

Designer

6.2 h

3 plates

5.0(2)

NOAMS

Designer

6 h

4 plates

NOAMS (A1 Mini)

Designer

6.9 h

5 plates

Click to see more

Open in Bambu Studio

Boost

224

Released

Bill of Materials

Maker's Supply Kits and Parts

Select all

Stainless Steel Balls

Round Magnet

Description

All aboard the newest arrival in the 2222pzzls Vehicle Series…

The Coal Train | Sequential Discovery Puzzle

Deep in the dusty hills, where steam and steel once ruled the tracks, rumors spread of a hidden Gold Nugget concealed somewhere within this mighty coal train. But reaching it will not be easy…

This sequential discovery puzzle invites you to think like a true gold prospector. Inspect every wagon, uncover hidden mechanisms, dismantle the locomotive piece by piece, and follow the trail through smoke, coal, and iron. Every discovery reveals another secret hidden within the train.

With its rugged old-world locomotive style and satisfying mechanical discoveries, the Coal Train is both a challenging puzzle and a striking display piece.

But one question remains…

Can YOU find the Gold Nugget?

Do you like my puzzles? Please consider a (small) donation on buymeacoffee.com/2222pzzls. Every contribution helps me keep experimenting, designing, and releasing new puzzles for everyone to enjoy at no cost. Thank you so much.

You can also:

Boost Me (for free)

I spend a lot of time crafting these intricate puzzleboxes for the community. Please enjoy my puzzleboxes for free, but consider to BOOST so I can create more for you.

Compatibily & Information

NO AMS NEEDED
A1 MINI COMPATIBLE
Some additional parts required
- 6x2 mm (1)
- 10x3 mm (13)
- 8mm bearing ball (2)
  - This also can be printed balls if you dont have steel balls

Print instructions

Select profile and print
Optional:
- There is a seperate printprofile for fake coal in the back of the trailer
- Credits for this coal plate to: @Hodgy86

Guides

Assembly
- Follow the detailed Parts & Assembly document I included with this
Solution
- See separate solution guide for solving the puzzle (when having trouble)
Resetting
- See separate resetting guide to reset the puzzle (when having trouble)

Check out my other puzzle(box) designs if you like more! Leave a rating, comment and boost to help me make more! Your feedback can also improve the model and printprofile!

Thank you for downloading my model(s).

Membership

Looking for a commercial license? Check out the membership options I offer for commercial licensing! Disclaimer: I currently only sell "OFFLINE" commercial licenses via membership (for example selling on fairs and markets). Online commercial licenses (for like ETSY or other online platforms) are only available for bigger puzzleshops (contact me for more info).

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Documentation (3)

Assembly Guide (1)

Coal Train - Parts and Assembly Guide.pdf

Other Files (2)

Solution Guide (Coal Train).pdf

Resetting Guide (Coal Train).pdf

Comment & Rating (33)

@Hodgy86

another great puzzle, love your work 2222pzzls. I didn't red so printed in bronze and added a pile of coal at the back. Came out great. looking forward to the next one......

The designer has replied

@2222pzzls

that looks awesome! I Also really like your “coal” model for in the back. is there any way you could add seperate printprofile to the modelpage with just that coal plate? I’ll make sure to name and credit you in the description of the model page. hope to hear! thanks again 🙏

@2222pzls_fan

could you mybe add solution

The designer has replied

@2222pzzls

yes, working on a document. Will be adding that in a few days 🙏

@2222pzls_fan

Replying to @2222pzzls :

thanks, but becouse im woking on my escape room for school project witch starts in an hour, could you just tell me last step after realising out a pin, this will be vewry helpfuul

@2222pzzls

Replying to @2222pzls_fan :

hi I’m sorry, it was night time in our country so I just saw your comment. How did the escape room go? Pulling the pin is the last step (if the mid wheel assembly is slid to the front still). Pulling the pin releases the inner cabin compartment to shoot up, which holds the gold nugget

@jerelad

Boosted

Print Profile

AMS

And here I was yesterday morning, wondering when your next jewel, similar to the firetruck, would be published.. And here it is! I had some trouble printing it, due to spaghetti detection caused by PLA Matte black (if like me you choose Matte over Basic, you'd better switch spaghetti detection to low, or turn it off completely for the black plate), but all in all the print went fine, although I had to rework all supports and brims as some pieces are quite tall and would have failed for sure with the PEI textured plate without increasing the brim and support adhesion. Anyway the result is beautiful, and I can't wait for my kids to try it! Many, many thanks for your hard work and this new gem in your collection. I'll provide more feedback if needed once I solve it!

(Edited)

The profile uploader has replied

@2222pzzls

Thank you for your kind words and your constructive feedback! Much appreciated 🙏 Hope you like it

@AdmiralStew

Definitely gonna need that solution document before I had it off to my students!

The designer has replied

@2222pzzls

I’ll make sure you have one tomorrow. Thanks for your patience 🙏

@2222pzzls

Solution Guide is added as PDF to model page. I made the resetting guide a seperate document. Hope this helps! :)

@AdmiralStew

Replying to @2222pzzls :

This thing is a beauty!

@Hmscl_Tc_Gnt

Holy cow! Only like 4 days since the SE2, and this comes out?! You are truly AMAZING! Incredible work; I will print this at once!

The designer has replied

@2222pzzls

haha thank you so much! and do you like it? Ps. I did not designed this in just 4 days, more like 2 weeks. But still 😊 I usually work on different ideas at the same time so that’s why I can release models sometimes fast in succession of eachother 🙏

@Hmscl_Tc_Gnt

Replying to @2222pzzls :

I just made it! For sure your best puzzle yet!!! I love the gear mechanism!!!!! Such a great overall design! Are there any more puzzle vehicles in the works? 😏

@2222pzzls

Replying to @Hmscl_Tc_Gnt :

Thank you very much! There are always more puzzles in the works in every series I have, so yes. A next vehicle series is also allready “brewing” in my head. Can take some time though so don’t expect this too soon 😅🙏

@2222pzls_fan

hello i just wanna ask does the meganets needs to be strong?

The designer has replied

@2222pzzls

I use cheap Chinese magnets and those work fine with all my designs. Stronger is always better but I test all my work with cheap magnets

@2222pzls_fan

Replying to @2222pzzls :

thank you for answer

@winner_3d

what seller to buy the 10*3 magnets from?

(Edited)

The designer has replied

@2222pzzls

the best answer would be via the Bill Of Materials on MakerWorld in the model page 😉But honest answer? AliExpress cheapest you can find also does the job. I use those because I need so much 🙈 They are strong enough

@winner_3d

@gohoos

Another excellent puzzle! I love that you can’t tell it’s a puzzle by looking at it. There are definitely some puzzle mechanisms I haven’t seen anywhere else. Very slick. I had to look at the assembly instructions to reset the puzzle - there is a specific order which must be followed. i did have one issue - I used some very strong 2x6 magnets and some cheap 3x10 magnets. This caused one particular locking mechanism to have issues. I reprinted that part and used a cheaper 2x6 and everything was perfect. I don’t think that I would never be able to figure this out had I not assembled it myself. It is quite a challenge! Good luck!

@BarbDow

Print Profile

AMS (A1 Mini)

Beautiful, but so hard to put together (awesome) that I can't imagine anyone getting it apart. Bwahaha!

@OPA10

looks great. I’m going to try it

License

If you want to use this model commercially, please join my membership.

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This user content is licensed under a Standard Digital File License.

You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.

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