Geared hub modification completed

I finished the parts for the modified planetary geared hub on Saturday and gave the hub and wheel parts to the wheel builder. I should have it back and have the uni.5 version 2.0 assembled on Thursday. I have photos of all of the new parts and the assembly process including a liquid nitrogen shrink fit on this web site:

Look in the Hub Failure and the two Modification sections.

Re: Geared hub modification completed

I am glad you are proceeding to use the hard pins with bronze
bearings in the gears now. I think you will have much more success
with this setup. I was wondering if you are using the porous bronze
bearing, (Oilite) or plain solid bronze. The porous would be better
if you are not sure of keeping oil in the hub. The gear teeth need
some lubrication anyway. The thrust washers can be made of the
same porous bronze too.

Lowell

Subject: Geared hub modification completed

>
> I finished the parts for the modified planetary geared hub on Saturday
> and gave the hub and wheel parts to the wheel builder. I should have it
> back and have the uni.5 version 2.0 assembled on Thursday. I have photos
> of all of the new parts and the assembly process including a liquid
> nitrogen shrink fit on this web site:
>
> http://staff.washington.edu/gharper/
>
> Look in the Hub Failure and the two Modification sections.
>
>
> –
> harper - Greg Harper: Frequent Faller (oops)
>
> -Greg Harper
>
> (now able to meet the pavement at 1.5 times normal speed)
> “It takes twice the man to ride half the bike.”
>
> ------------------------------------------------------------------------
> harper’s Profile: http://www.unicyclist.com/profile/426
> View this thread: http://www.unicyclist.com/thread/16831
>
> ___________________________________________________________________________
> rec.sport.unicycling mailing list - www.unicycling.org/mailman/listinfo/rsu

Lowell-

I’m just using bronze. That’s what I had on hand. The shafts, bushings, and thrust washers were greased with the same gear grease that I stuffed the whole hub with. The small parts were greased by hand as I assembled the planet cage.

Greg -

Nice job on the hub! Should be smooth sailing now …

Steve Howard

Re: Geared hub modification completed

It should be alright, as long as there is some lubrication in the
hub. Some will melt and get in the bearings, it’s impossible to
avoid all friction, it will warm up while you are riding it.

I think you have done a great job in figuring out how to make
this hub. A regular engineer.

Lowell

> Lowell-
>
> I’m just using bronze. That’s what I had on hand. The shafts, bushings,
> and thrust washers were greased with the same gear grease that I stuffed
> the whole hub with. The small parts were greased by hand as I assembled
> the planet cage.
>
>
> –
> harper - Greg Harper: Frequent Faller (oops)
>
> -Greg Harper
>
> (now able to meet the pavement at 1.5 times normal speed)
> “It takes twice the man to ride half the bike.”
>
> ------------------------------------------------------------------------
> harper’s Profile: http://www.unicyclist.com/profile/426
> View this thread: http://www.unicyclist.com/thread/16831
>
> ___________________________________________________________________________
> rec.sport.unicycling mailing list - www.unicycling.org/mailman/listinfo/rsu

Re: Re: Geared hub modification completed

Ya…ya…I’m a legtrical engineer. I work with legtricity.

Re: Geared hub modification completed

----- Original Message -----
From: harper <harper.1e38z@expired.totalnic.net>
>
> Lowell Terry wrote:
> > A regular engineer.
> >
> >
>
> Ya…ya…I’m a legtrical engineer. I work with legtricity.
>
>
> –
> harper - Greg Harper: Frequent Faller (oops)
>
> -Greg Harper

No kidding, lots of big companies make more mistakes like the
four gear combo that didn’t work or using no bearings than you’d
think. Some even hit the market. Makes you wonder, “what were
they thinking”. You did your homework yourself. Good going.

Lowell

In the close up of the sun cage, the collar on the inside of the sun gear looks a little masticated. Was this from the machining process, or it’s previous incarnation? The the sun cage have to be altered to accomidate the new planet cage?

Christopher

I chewed on this comment for awhile and I know you are chamfing at the bit for me to say it was masticated but, in fact, it is only a weld that you are looking at. I had originally designed it with only one weld and it attaches the sun gear to the sun case.

As always, impressed and amazed at your work, Harper.

Having it all documented on your site makes it easy to follow, too.

I think you can officially take the word “Lame” off your site, though

Thanks.

Sorry, Ryan. The lame stays.