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Automotive Differential with Hypoid Gearing, Motorized Model

by otvinta3d Feb 16, 2017
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Currently printing this, it is amazing. I assume he is using a ~ 60 rpm N20 motor. Super cheap off ebay, the motor fits perfect as I have the housing already printed, and from the vids, I just figure that 60 rpm is about what is used. Thanks you for this great and educational print.

Do you have a link for the motor ?

Amazing object, thanks for sharing your desing.

I like this model. It is a great conversation piece and helps to show others how a differential works at the basic level.

I have created a battery box that holds 4 AA batteries and a switch. The model just sits right on top of it. Keeping it powered with a switch and hiding the batteries and wires.

The battery box can be found here: https://www.thingiverse.com/thing:2525983

What happened to the battery box? I get a 404 error when following the link.

Beautiful, I love it!

Hi Otvinta3d,

I have printed all parts as presented, but I wonder why the hole in the carriercover does not match with the axis and so is not bearing on that side.
Diam axis is 13 mm and diam hole is 20 mm.
Could you adapt the carriercoverhole or should I turn a separate bearing on my lathe?

Wim de Groot
The Netherlands

The left side gear is not meant to go through the hole in the carrier cover. It is the left shaft that goes through that hole.

Hi Otvinta3d,

Yes I understand that the left side gear is not meant to go through the 20mm hole, but that just the left shaft goes through that hole, in which case the diameter of the hole could be equal to the shaft diameter, so 13 mm (in fact preferably a sliding fit) and consequently the left side of the carrier will bear on that shaft as well.

Wim de Groot

I see what you mean now. Yes, the hole in the carrier cover could have been made smaller to tightly hug the shaft. However I don't believe this would add to the structural soundness of the assembly in any significant way. If you wish, I can create a custom version of the part for you. Please contact us at http://www.otvinta.com/contact.html for further assistance.