OpenRC 1:10 4WD Truggy Concept RC Car

by barspin, published

OpenRC 1:10 4WD Truggy Concept RC Car by barspin Jan 14, 2013

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Update 2013-12-10: Added Spec sheet (PDF) and Differential assembly instructions.

Update 2013-08-30: KENisFIS designed new chassis and sideplates to fit on smaller buildplates! Download them here: thingiverse.com/thing:131262

Update 2013-08-20: 3Dprinted shocks available here: thingiverse.com/thing:135209

Update 2013-08-04: Uploaded "OpenRC Truggy Update 2013-08-04.zip" which contains updated files as follows:

Chassieplates are modified to add more space for placement of the battery next to the central diff. (central diff has been moved more off center).

Top Plates have also been modified according to the above.

Added a battery holder and receiver holder.

Modified the bumper to hopefully withstand impacts better.

As allways, questions are best asked in the G+ Community.

Update 2013-05-29: Uploaded "STL Files For OpenRC Truggy Rev B.3.zip".

Update 2013-05-18: Uploaded "Servo Holder for BMS-620MG Servo.B.1.stl" that will fit the suggested servo from HobbyKing.

Update 2013-05-18: Uploaded "Front and Rear central driveshafts" and "Central drive shaft Joint and Input gear". These parts are modified to be a little stronger than the earlier version.

Update 2013-05-07: Updated steering uploaded by request (See "Updated Steering.A.2.stl"). It has some minor changes made for reinforcement and there is also support added.

Update 2013-05-01: New STEP of the Main Assembly added "OpenRC_Truggy_Assy_B.3". This has all the latest stuff which is mainly small design changes. Among other things below are som modifications:
More compact shocktowers to lower the profile of the car.
Modded Wishbones
New steering with bearings
Very basic body holders for those who cannot make their own.
And anything else i forgot...
Note, don´t print that wing, it´s for show only!!
I have not added any STL´s this time!

Update 2013-04-07: Added STL files for printing in one single ZIP file (OpenRC Truggy B.2.ZIP). Use this if you want the latest stuff! Also uploaded a STEP file of the complete assembly Rev B.2.

If your looking for compatible CVD driveshafts see info below:

CAD file (STEP) file available here: docs.google.com/file/d/0B7TCLh-I8q6YY2ZueFpQdVZqb0E/edit

Link for sourcing: conrad.com/ce/en/product/231121/

Update 2013-04-06: Latest version (Rev B.1) added. I have uploaded a STEP file, will add STL´s later!

It´s with great pride i give to you my interpretetion of a 3D printable 1:10 Radio controlled truggy car.

At this stage it´s very much experimental and will probably need some modifications and upgrades to be what we all want it to be but i would like to think this can be a good starting point!

The core philosophy of this project is that it is for everyone!
Also it is should be as printable as possible, if you have a 3D printer you can make it! So some additional are parts needed such as driveshafts but those can easily be sourced from many places.

I have tried my very best to keep the design as simple as possible and this is so that it should be as easy as possible to modify!

So, not so fancy but it´s yours to do what you want with. All i ask is that you share with others!

The bottom plate is split in two to fit on my printer. When assembled, the bottom plates, center piece and top decks makes for a quite "sturdy" design! Better than expected actually.
On the other hand, it´s also designed so that you can easily do the bottom in one piece using another material if you want and modify or maybe even skip side guards and top deck.

As time was running out i had to rush the design of the central differential housing and servo saver so if your up to it, i would love to see new designs on those.

I have put alot of time in this and spent many nights drinking coffee and battleling all kinds of problems so i really hope you all like this thing! =)

If you have any questions, suggestions please join the discussion over at Google : plus.google.com/u/0/communities/112745535856143176146

Short video on drivetrain test: youtube.com/watch?v=gzw_CxjpkkU

Introduction video: youtu.be/dElz53EsmtM

Test drive video: youtu.be/uBReuPsthDw


Recent Comments

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For now there are quite a lot .stl's to download, which of these i should print, and how much of each? I'm getting confused about it, or i just don't see an instruction

Very nice work, I'm in the process of printing all the parts and ordering the required parts. Everything working great so far. I noticed on the digital design you have a rear spoiler with supports and some nice hold downs for the body. Do you have the .stl files or do you know where I could find them? Thanks and I'll be sure to post pictures when I'm finished.

My Makerbot Rep 2 would hit the endstop on the far side, causing it to think it was somewhere else. This caused the entire thing to get shifted. I'm printing this whole car at 95% and its coming together great so far

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Electronics (Check here for suggestions on suitable electronics: groups.google.com/forum/?hl=en

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keithoist on Mar 22, 2014 said:

For now there are quite a lot .stl's to download, which of these i should print, and how much of each? I'm getting confused about it, or i just don't see an instruction

Gawlik on Mar 18, 2014 said:

Very nice work, I'm in the process of printing all the parts and ordering the required parts. Everything working great so far. I noticed on the digital design you have a rear spoiler with supports and some nice hold downs for the body. Do you have the .stl files or do you know where I could find them? Thanks and I'll be sure to post pictures when I'm finished.

jangermann on Mar 15, 2014 said:

NICE!! I am going to build this one! What is the best material for the gears? PLA,ABS or nylon?

alexbilton on Mar 8, 2014 said:

Has anyone made a chassis that can fit a makerbot replicator 2?

barspin on Mar 8, 2014 said:

I designed it to fit on a Replicator 1 so it will fit on your Replicator 2 without problems since it has an even bigger build platform than the Replicator 1. =)

Toother1321 on Feb 4, 2014 said:

Any Info on your slicer settings? Infill %, Number of Shells, etc....?

KomptonWest on Jan 27, 2014 said:

Any information for printing on smaller beds? As it stands I am unable to print the front and rear top plates. Any help would be nice. Thanks.

hedchange on Feb 1, 2014 said:

Not sure if you had seen the update but the following thingi was made by a member that has a build plate of 150x150. Hopefully this helps
Update 2013-08-30: KENisFIS designed new chassis and sideplates to fit on smaller buildplates! Download them here: http://www.thingiverse.com/thi...

nitros12 on Jan 19, 2014 said:

create some way so we can use nitro engines with this

AlirezaSaberi on Jan 11, 2014 said:

My you make it clear for me which files should be printed? I see some updated files in your things files

vonTugboat on Jan 15, 2014 said:

Same here, I'm itching to get started, so I'm printing stuff that doesn't appear in the Update file, just in case. Please let us know :)

gopedunderground on Dec 1, 2013 said:

Started my Truggy project last night...going to take some time with this build. Thanks for this totally rad RC car, so much cooler than a printed firearm! More updates on my build soon!

gopedunderground on Dec 3, 2013 said:

Not sure why but the Center_Diff_Casing_Plate.A.0.stl printed very funky...the back part of the bigger piece on the plate did not print properly. The the big hole and upper hole were carried through and around the corner...it printed support all the way around. I will post pics very soon.
Sliced with Skeinforge (50) in Makerware. 0.20mm 75% infill, support yes, no raft.

barspin on Dec 2, 2013 said:

Awesome, looking forward to pictures! =)

maxsteel333 on Sep 23, 2013 said:

could i have the cad file for the bevel gear please??
btw this thing is awesome

barspin on Nov 2, 2013 said:

Check downloads for the bevel gear.

ryansto on Sep 18, 2013 said:

so if you decide to laser cut the chassis plate how do you get the wedge effect in there where its thicker then tapers down?? just curious is there a add in part or different casing?

romfont on Aug 13, 2013 said:

You wouldn't download a car

bblazinc on Jun 3, 2013 said:

Hi, great work! I have a question, I'm building a camera rig/dolly with some rc components, and I'm planing on using a motor from a drifting rc car. So I was wondering what gear reduction are you using? Also are all of your gearing parts printed or do you use a store bought gear for the primary motor reduction(the one mounted on the motor)?

ryansto on May 9, 2013 said:

A list and part number for the electronics would be great i click on the google community and it takes me to a new community not related to this. Please help me.

barspin on May 14, 2013 said:
barspin on May 9, 2013 said:

OK, I will setup an updated list for electronics.

shap on May 3, 2013 said:

Any chance you can update the link for electronics suggestions? That one isn't getting me very far. :-)

barspin on May 14, 2013 said:

Check out this post: https://groups.google.com/d/ms...

barspin on May 3, 2013 said:

Sorry, not at home atm. Check to Google + Community, there is the latest list (not posted by me) and those parts are the ones I have ordered.

kwalus on May 3, 2013 said:

Outstanding design!

barspin on May 3, 2013 said:


hedchange on May 3, 2013 said:

Is the BOM still the same as before, and is there any opensource or free software to open up stp files for figuring out the BOM?

hedchange on Apr 20, 2013 said:

Just started getting into building a prusa i3 about a month ago. Seems like i have sourced everything but the the steppers and the control board. I ran across this thingi and my son's jaw dropped when he saw it, he is 6. We have been talking about buying an rc car or quadcopter. Now that the printer is almost done we can do both on a budget. Will def post my experience on the build and keep the community informed. Thanks for the design.

barspin on Apr 20, 2013 said:

Hi Hedchange!

Thanks for the comments. I hope you build a car of your own and share your progress and comments with the rest of us on the Google+ community!
Let me know if there are any questions, i'm here to help. =)

/Daniel Norée

Auzze on Apr 7, 2013 said:

can you split the wishbones into to 2 files, left and right as the 4 parts want fit my i3 plate size.


benlinus on Mar 19, 2013 said:

Thats cool I got it. I plowed into Blender( finally I have had it for about a year) I figured out enough to delete the right side pair. Thanks again for doing this. It is starting to look good. Really awesome. Love too see this,


Ben Linus,
Go To My Link

barspin on Mar 19, 2013 said:

Sounds awesome Ben! Looking forward to seeing your finished car. I have finally started working in mine again! =)

maxoutny on Mar 7, 2013 said:

Is it possible to separate Wishbone_Plate.A.
It doesn't feet on my Prusa.
Thank you.

steve918 on Mar 17, 2013 said:

See if these work for you http://cl.ly/2L1S2q3M3b1e

Tommydag on Mar 3, 2013 said:

Amazing work! I love seeing things like this because it show the possibilities of at-home 3D printers, even if some parts are proof-of-concept.

I am currently running a slightly modified prusa and when I tried to print the chassis plates, they ended up being to big for my print bed. I must not be the only one encountering this problem. I was wondering if it would be possibly to split the bottom plate up into four? I would do it myself but I don't currently have the cash to drop on a Netfabb license and I would imagine that some things would need to be altered for the 4 plates to maintain strength. Maybe you could upload a template for a bottom piece for those who have access to a laser cutter or want to hand cut the bottom.

I am currently printing out the other pieces and I am very excited to drive it around when I finish. Again, props on the design!

barspin on Mar 5, 2013 said:

Thanks Tommydag for the positive feedback! That´s what makes it all worth it!
About splitting the bottom, do you just want it split in the middle? I can do that for you, i´m not sure what it will do to the chassie in terms of stability though... Let me know.

Kulturfolger on Jan 29, 2013 said:

Hi barspin!

A short update: I managed to print most of it with slic3r. Working with 0.8 perimeter thickness and three perimeters is basically the key factor for nices looking parts. I netfabbed the pieces before printing.

The chassis printed successfully. My normal M3 screws dont fit into the lower shield, my caliper says their diameter is 2mm but the hole on the plate is 3mm. Did you use self-cutting screws? I would prefer self-cutting screws over normal m3. They form a better connection.

The center diff is now printing (4 hours) and is looking fine so far.

PS: I would recommend to replace the shockspacers with aluminum parts. If've seen shocks including those spacers.

ronskironkeli on Jan 29, 2013 said:

Hi barspin!

Incredibly inspiring work you have done indeed I must say! I've been thinking about 3D printers for couple of months now and the more I have got information the less I have slept at nights, but now I can't sleep at all! :D

My short scope dream is to build a 1:28 awd racer similar to the Kyosho mini-z. I already have the drive train as I have been trying to make the car with material removing methods but due to lack of decent machinery, progress has been somewhat slow :D

In this scale it might be almost possible to build also the bodies if one could get access to such cad data or had an eye for car design :)

Hmm, I just might be able to get an Ultimaker before the spring if I "forget" my wife's birthday present! Oh boy it's gonna be a long winter! :D


barspin on Jan 29, 2013 said:


Thanks for the nice comment! I have two 3D Printers and they are the coolest thing i have ever bought! =)

I´m having two bodies scanned and reworked. 1 Truggy body and one Touring Car body. Both 1:10 scale. =)

urbanmaker on Jan 29, 2013 said:

Hay there, So I have made one. Now I can see that the differentials made of plastic won't hold up to the kind of driving I want to do. I have got a set of LOSI T-Ten dfferential housings. They will work but the bearing are wrong. The side bearings are 12 x 18 x 4 and the input shaft bearing are 5X11X4. The housing that you have made is almost there. I am very much beginner using a CAD. Also you have the original files. I was wondering if you could mod the dif housing so that it will fit the new bearing? The center diff uses that same diff assmebly just with different connectors. So the center need updating as well. I hope you can if not I will try.

barspin on Jan 29, 2013 said:

Hi, thanks for uploading the picture it´s inspiring! =)

Regarding your requested mod´s i will do them but i would like a favour in return if it´s ok. It would be awesome if you could post a some info on those parts and where to source them over at Google+: https://plus.google.com/u/0/co...

Also, do you drive axles fit the current setup? If so could you provide the same info asbout those aswell for the community?


Warthog on Jan 26, 2013 said:

Very Impressive!! Great job!

barspin on Jan 29, 2013 said:

Thank you!! =)

Longbow212 on Jan 23, 2013 said:

Hi Barspin, this looks awesome!
Quick question though, what are the dimensions of the biggest part? Ie, what print area would I need to print this?

barspin on Jan 23, 2013 said:

Thanks alot, i´m glad you like it! The biggest parts are the front and rear Chassie Plates which are about 180x150mm. The sideguards are something like 220mm long. What kind of printer do you have, and what size is the printbed?

remondo on Jan 22, 2013 said:

Absolutely outstanding work on this, I could not believe that pretty much the entire thing was printable. You've inspired me to dust off my printer and print this out, I hope to contribute to the design once I've sourced all the vitamins. I hope you can find the time to continue development and do some testing, I'd love to see this thing working. I've also just noticed from the exploded drawings that it's 4wd, really impressive!

barspin on Jan 22, 2013 said:

Thanks! I´m happy to hear it got you inspired. =)
I´m going away for a one month vacation so unfortunately there will not be any major updates/tests until mid march... But then it´s game on!!

urbanmaker on Jan 21, 2013 said:

Ok, I am done with what you have provided but, I am still waiting for the bearings to come in. I put the two top pieces on last night. The trugy Looks very good. However I don't see the standoffs and the part that the center diff fits into. In other words what goes under the top covers?

barspin on Jan 21, 2013 said:

The missing file (Center Diff Casing Plate.A.0.STL) is now uploaded. Again, thanks alot for the heads up! =)

barspin on Jan 21, 2013 said:

Oh no, i missed to upload the center diff casing!! Thanks for bringing this to my attention, it is included in the STEP file but i will upload the STL's later tonight! Please note that this part will work but needs to be redesigned in the future. (Aswell as the servo saver).

feststoff on Jan 18, 2013 said:

Hi barspin,
you did an impressive work!
I'm about buying all the stuff I need for the openrc car to have everything prepared, when my replicator will arrive. Can you mention the lengths of the M3 screws? That would help me a lot.

barspin on Jan 18, 2013 said:

I think it might be a good thing to create an exploded view of the intire car together with a proper BOM list. I will upload one when i get holme. Sometime next week!

urbanmaker on Jan 18, 2013 said:

I have printed the Dif plate. I print at .28 layer and I am using pla. Any way, did I miss something in the print. I can't seem to find the bevel gear for the incoming drive shaft. Also, If you have one could you post a picture or diagram on how the servo saver look when done. This is so cool! Is this car based on anything that I could buy metal part for? I thing I would like the center dif and the front and back difs to be metal if I can find then and it is not a violation of the all "printed part" code.

barspin on Jan 18, 2013 said:

The incoming bevel gear should be part of "Bevel_Gear_Drive_Shaft" STL, let me know if you can't find it!
I will post something for the servo saver when i get beack home next week!

Kulturfolger on Jan 17, 2013 said:

Hey barspin,

This is it! Great achievement !

I'm currently printing all the parts. I will print all those bulky body parts in PLA for added strength and everything else in ABS. Mendelmax, Slic3r, 0.5 nozzle, 0.2 Layer.

Maybe some hints on sourcing he parts (I live in germany):

Maybe it would be cool to use some kind of upgrade kit for existing cars to source the bearings, suspension and so on. The LRS S10 Blast parts used by MCNugget as well fit in nicely:

LRP Ballbearings 15x10x4mm (10 Pieces) - S10
LRP Ballbearings 10x5x4mm (10 Pieces.) - S10

Can you give me the measurements for the drive shafts and suspension? I will help you creating the BOM for germany!

barspin on Jan 17, 2013 said:


If you live in Germany you can find a lot of parts over at: www.conrad.de . I'm currently traveling so unfortunately I'm without a computer and cannot help you for a while. You could try to ask someone else to help over a Google+ (link is posted above).

g00bd0g on Jan 16, 2013 said:

Freakin' awesome.

barspin on Jan 19, 2013 said:

Thanks! :-)

urbanmaker on Jan 16, 2013 said:

I can't print the wishbone plate. Is there any way you could you could make a front and back plate?

barspin on Jan 16, 2013 said:

Hi! Thanks, I'm currently traveling and without my laptop. I can do this when I get back but it won't be until next week. Otherwise I think you could do it in Netfabb basic.

PolygonPusher on Jan 15, 2013 said:

This is the coolest 3D print thing I've seen. Specially since the best feature is that one can 3D print any part that breaks when using the car. Spare parts are basically for free!

on Jan 15, 2013 said:

You'll also find a truckload of bearing offers if you just search for the dimensions on ebay.
5x10x4 is size MR105
10x15x4 is size 6700
Try to get a 2RS version - those are actually sealed, while the ZZ variants still allow dust and sand to get into the bearing.

KellyBC on Jan 15, 2013 said:

This is great, thanks for all your work! It looks like many of the parts could be laser cut. Do you have DXFs of the flat parts? Although, I am not sure if the parts are made in standard acrylic sheet thicknesses.

Regardless, I will be working on getting one of these printed for sure.

Again, great job!

barspin on Jan 16, 2013 said:

Hi! The baseplate is 4mm thick and if I'm not mistaken the other flat parts are 6 and 7mm thick.

thantik on Jan 15, 2013 said:

Do you have a source or part names for the bearings? Like when people list 608zz bearings, they don't usually throw the dimensions like that. What are the actual bearing IDs?

StreelyDan on Jan 15, 2013 said:

Hey barspin, Great work!

I've been into RC for a while and IM just now getting into 3d printing, I cant wait to combine the two. I have a couple questions:

First of all, what printer are you using? your prints look really high resolution and shiny, are you sanding them after printing?

In terms of design, your ride height looks a little low but you have the front shocks pre-loaded all the way down, is weight going to be an issue? or do you just need stronger springs on the front?

Im looking forward to playing around with your design!

barspin on Jan 15, 2013 said:

Hi SteelyDan!

Thanks for the nice comment! Everything is printed on a Replicator. All parts are printed with a layer height of either 0,2mm or 0,25mm. No sanding.

Regarding the shocks i just used what i had at hand which was from my 20+ years old Kyosho. When i was 12 years old i decided it would be a good idea to glue the shocks that way. One might have to do some adjustments to fit your own shocks. If you (or anyone else) need help with that let me know!

Regarding the weight... it´s all plastic and light as a feather! ;-)

IcanCwhatUsay on Jan 15, 2013 said:

Flippin Awesome Sauce! You should make it look like the Toy Story RC Car though ;)

Whizbang on Jan 15, 2013 said:

This looks awesome, I have always wanted to get in to rc cars. What a great way to easily get into a hobby.

AMS3000 on Jan 14, 2013 said:

I've been waiting for this one, thank you so much!

sa7ina on Jan 14, 2013 said:

I'm in love with you man!!!!!!!!!!!

Rasle500 on Jan 14, 2013 said:

This is sooo cool!

CreativeTools on Jan 14, 2013 said:

This is the greatest 3D-printable toy! Thanks for sharing this with the RC-enthusiasts world!