OpenRC almost all metal rugged driveline

by Steamerzone, published

OpenRC almost all metal rugged driveline by Steamerzone Oct 9, 2013
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  • Added a reciever antenna mount
  • Added a much stronger steering stabilizer bar
  • Added 57 tooth spur 0.8mod/32dp gear size
  • Added 12,14 & 16 tooth pinion 0.8mod/32dp
  • Added center diff box with support for smaller pinions
  • Added spur/pinion gear cover (keep the dirt out)
  • Added thicker wishbones (improved strength)
    Below is a list of parts that I used for an almost all metal driveline for the OpenRC 4WD Truggy using cheap HSP parts. (ebay)
    3x HSP 02024 Diff Complete
    2x HSP 02030 Drive Gear
    2x HSP 02016 Universal Loint ( 1 pair )
    4x HSP 188015 Wheel axle ( 2 pairs )
    2x HSP 06022 87mm drive shafts ( 1 pair )
    4x HSP 02038 Ball Head screw
    4x Axial Narrow 12mm Aluminum Hub Hex AX30427
    I made some adapters, gears and spacers to get it to fit into the normal diff housings. See pictures/STL's.
    Wishbones, turnbuckles and steering pins also are adjusted parts (in length) to compensate for the smaller diff & changed axle.
    Running this setup successfully with a pretty powerful sensored brushless motor for some time now.


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what shocks did you use exactly?
I have the problem that the recess for the shocks on the wishbone is to small for my shocks. It is around 2 mm smaller than the original one. Is it possible to make this bigger? That would be very nice, or did you have the source-files?

Thank´s in advance.

Is it possible to find a 100% metal center differential?
I found https://hobbyking.com/en_us/central-diff-complete-1pc-bag-33154.html
But I do not know if it is appropriate.

I probably am missing something obvious but I dont see a list of metal driveline components that go with this. Can someone point to the list? thanks.


You can post the model of front, middle and rear differentials? driveline.

The differentials are all the same, the center diff is modified with the printable gear.

Comments deleted.

I'm looking for HSP 02030 Drive Gear. Do somebody have it in STL file? Because from ebay it takes a long time to arrive.

I'm ordering parts from the list and i have a question. I'm planning to run it on 3S battery. Wich motor( Size, n of turns, KV),and Waterproof ESC (Amps) from inexpensive you can recommend for this build?(I'm new to RC Cars). Central Diff. will be also in metal.

Hi Steamerzone, I have purchased all the parts you recommend for an all metal driveline. One area that doesnt seem to work and I need your help on is the drive shaft and wheel axle assembly. I ordered the following parts: 4x HSP 188015 Wheel axle ( 2 pairs ) and 4x Axial Narrow 12mm Aluminum Hub Hex AX30427. When you assembly these the end of the wheel axles are too long, so you have 6 or 7mm of the flattened part of the shaft spare between the c-hub bearing and the aluminium hub hex. If i could somehow send you a photo perhaps you could understand? Is there a way to send you the photo showing the problem? secondly the hub hex will not slide fully onto the shaft of the wheel axle (the part with the flat) as the hub hex has a reduced diameter hole at the end of the hub hex. This seems strange. Again if i can send you a photo you maybe be able to help?

Did you use the length adjusted parts for the following items?
Wishbones, turnbuckles and steering pins also are adjusted parts (in length) to compensate for the smaller diff & changed axle.

This is great - working my way through it as we speak!

Question - what size bearings are we supposed to use for the bevel gear holder? Thanks for the hard work :)

They are the same as the wheel bearings. (1054)

Congratulations! You have made a perfect work! Could you upload more photos about the metal driveline? Because i don't know very well how i can construct it.

Thanks very much.

Could you please add STP files of spur gears?

I'm looking at adapting these differentials to work with some Traxxas universal joints. How are the diff outdrives connected to the internals? Is it similar to how the input and pinion have set screws?

The bevel gear holder is mounted onto the front and back differential housings, you have to modify them a bit to get it to fit, and screw them into place. If you need it I can take some pictures of it.

If you could take some pictures that would be awesome! Thanks for helping me out man I really appreciate it!

Added two pictures, hope it helps!

I assume the differential housings need to be drilled out to fit the bevel gear holders?

Okay I think I figured it out and narrowed my confusion down to one part. Where does the Bevel Bearing Holder go? Is it the piece that is between the driveshaft and the front/rear diff's? Thanks for your help!

Hey this is sweet and I just purchased all the parts you have listed from ebay. However, i was wondering which STL's do I print? There seems to be some duplicates and I don't want to print anything I don't have to. Thanks!

that Spur_Gear_Two_Part_Design1 smells like nylon