Final epicyclic hub parts

Today I finished machining the last of the parts for my epicyclic geared hub project. The last eight photos in the the link given chronicle the turn-table work on the mill to drill the massive number of holes required.

This page has a lot of images now and may be getting to be time consuming for some to load. If you are really interested and it’s too cumbersome, let me know and we can work out some other transfer arrangement or I can split the page. I am kind of lazy, however, when it comes to that kind of stuff.

I have made changes to the detailed drawings that I have not yet updated on my site. There are now three 1/4-20 bolts holding each hub together. There are 3 dowel pin holes and 3 jack screw holes rather than 2 each. The dowel pins transfer all of the torque and provide the alignment so I added one. The bolts don’t do that much to hold the hub together so I took out 3 of them. I added a jack screw to keep the hub halves from binding when taking it apart.

I added a snap ring groove and a snap ring to the axle on the left side, away from the sun gear, in order to completely capture the thrust on the left side. This will ease the assembly process (but not as much as I would like).

I spoke (pun?) with a wheel builder on Thursday to finalize the radiusing design on the hub flanges before I drilled and counter sunk them for the spokes. When I receive the aluminum cranks next week, I will fit them to the axle and only then will I be able to assemble the hubs. I have to wait to see if the axle needs modification at the tapers.

The next updates should be:

Photos of the assembled hub.
Photos of the laced wheel.
Photos of the completed unicycle.
Nude photos of me riding it.

Congratulations, I look forward to all the pictures and I do mean ALL Wink
Dustin
Zupancic

“harper” <forum.member@unicyclist.com> wrote in message
news:a44v5g$5ta$1@laurel.tc.umn.edu
> Today I finished machining the last of the parts for my epicyclic
> geared hub project. The last eight photos in the the link given
> chronicle the turn-table work on the mill to drill the massive number
> of holes required.
> http://www.harper.unicyclist.com/EpicyclicHub.htm
>
> This page has a
> lot of images now and may be getting to be time consuming for some to
> load. If you are really interested and it’s too cumbersome, let me
> know and we can work out some other transfer arrangement or I can
> split the page. I am kind of lazy, however, when it comes to that kind
> of stuff.
>
> I have made changes to the detailed drawings that I have
> not yet updated on my site. There are now three 1/4-20 bolts holding
> each hub together. There are 3 dowel pin holes and 3 jack screw holes
> rather than 2 each. The dowel pins transfer all of the torque and
> provide the alignment so I added one. The bolts don’t do that much to
> hold the hub together so I took out 3 of them. I added a jack screw to
> keep the hub halves from binding when taking it apart.
>
> I added a
> snap ring groove and a snap ring to the axle on the left side, away
> from the sun gear, in order to completely capture the thrust on the
> left side. This will ease the assembly process (but not as much as I
> would like).
>
> I spoke (pun?) with a wheel builder on Thursday to
> finalize the radiusing design on the hub flanges before I drilled and
> counter sunk them for the spokes. When I receive the aluminum cranks
> next week, I will fit them to the axle and only then will I be able to
> assemble the hubs. I have to wait to see if the axle needs
> modification at the tapers.
>
> The next updates should be:
>
> Photos
> of the assembled hub.
> Photos of the laced wheel.
> Photos of the
> completed unicycle.
> Nude photos of me riding it.
>
>
>
>
> –
> harper
> Posted via the Unicyclist Community - http://unicyclist.com/forums

WOW! That is really looking cool. We’ll all be anxiously awaiting the next updates.

Cherie

I posted the updated dimensioned drawings on my site.

–Mr. Harper,

 Bravo!!! Bravo!!! Very impressive indeed.  Looking forward to all of the pictures as well (with the exception of the last, haha).

What are you planning to do with it once finished? I presume you will ride it and show it off to many, but do you have any plans to have many units produced? If they don’t cost tooooo much I might be interested in buying one. Otherwise, is it possible to just take your plans to a machine shop and have them craft the thing?

I plan to sell the second one to recover only the out of pocket expenses. All of that is discussed in a previous thread if you are interested.

http://www.unicyclist.com/forums/showthread.php?s=&threadid=16134