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PostPosted: November 20, 2020, 8:48 pm 
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Joined: November 20, 2020, 8:30 pm
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Just wanted to touch base and show some of the progress on the universal chain drive diff unit being designed. Prototype machining is almost complete.

These are cut on a Mazak 200 CNC machine.

Pics show blank bearing block, and dummy hardware just for checking fit. The bore will be put in to match the desired differential bearings.

This will be a Ford IB5 diff on this one for my car.

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PostPosted: November 20, 2020, 9:46 pm 
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Welcome aboard. I'm sure we'll all be very interested when it's done. It looks like you have a way to go, but a Locost (as in: light weight and inexpensive) style chain drive diff would be high on many gotta-have lists in this group.

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PostPosted: November 20, 2020, 10:47 pm 
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JackMcCornack wrote:
Welcome aboard. I'm sure we'll all be very interested when it's done. It looks like you have a way to go, but a Locost (as in: light weight and inexpensive) style chain drive diff would be high on many gotta-have lists in this group.


Thanks for the welcome!

The prototype will hopefully be ready to go out for anodizing next week. I'm waiting on my bearings and then they will get bored and shipped

These are pretty light weight, as they are cut from 6061 alloy.

I ordered an IB5 diff, but this setup could be made to work with any number of diffs. I wanted to keep it small because this particular setup will be going into my 1967 Fiat 850 Coupe coupled to a Kawasaki Ninja ZX12. :)

I'll keep updates coming as things progress.

And any recommendations are absolutely welcome!!!


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PostPosted: November 21, 2020, 12:41 am 
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Joined: November 11, 2013, 4:47 am
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Location: No. Nevada
Just for cross-reference.

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PostPosted: November 21, 2020, 2:30 am 
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RichardSIA wrote:
Just for cross-reference.

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That's a whole lotta chains!


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PostPosted: November 23, 2020, 5:32 pm 
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UpNorffChainDrive wrote:
RichardSIA wrote:
That's a whole lotta chains!



Sure is.

With the resultant weight, volume, noise, and maybe driveline lash, what's the appeal over a regular diff?

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PostPosted: November 23, 2020, 7:05 pm 
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It was a very Locost solution to the issue of not having much machine equipment on hand.
Actually works very well, and no diff so always has full traction on acceleration.

More detail, https://www.uniquecarsandparts.com.au/lost_marques_frazer_nash

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PostPosted: November 23, 2020, 10:16 pm 
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RichardSIA wrote:
It was a very Locost solution to the issue of not having much machine equipment on hand.
Actually works very well, and no diff so always has full traction on acceleration.

More detail, https://www.uniquecarsandparts.com.au/lost_marques_frazer_nash


Thanks for the link! Definitely an interesting read!

I'm gonna stick with a IB5 rear in my Fiat and have the ability to just pop the chain ring off and swap to a different tooth count when needed. (The joys of working with machining and waterjet cutting equipment! haha) We'll see what modifications will make this work even better and make it easier to machine too. Always room to improve.

Here's a shot of the Fiat next to my Pathfinder, and my not exceptionally tall for his age 9 year old son. lol

Image

Stripped down it's pretty absurdly light weight. and definitely tiny.


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