[python] Re: splitable pivot
- From: "25hz" <25hz@xxxxxxxxxx>
- To: <python@xxxxxxxxxxxxx>
- Date: Fri, 4 Mar 2005 22:00:58 -0500
No, no, I love to ride the bent, it's just that me and Canadian winter cold
do not mix. My "old bones" don't like the cold anymore. I made rollers and
ride my trike every noon hour but I've only done about 400 km so far this
winter. We just moved into a new house with a bigger garage so all my tools
and bike parts are still in boxes. I also need to do some insulating before
I can comfortably work in the garage in the cold weather. So for now, I'll
have to carry on noon hour, indoor riding, as the amount of snow and the
temperature prohibits anything else.
I always have about 4 or 5 tikes/bents in the planning stage so am always
looking to build the next one.
As for the bearings, yeah, the ones I'm going to use are the bearings used
in the pillow block on the left hand side of the picture. The actual block
doesn't split, and it looks like you drive out the old worn bearings, and
press the new ones in. I'll know better when I get a better look at them.
The actual bearing part is only about $5 Cdn, so much less expensive than
precision sets, bigger, and hopefully stronger.
The high molecular density plastic used for some of the bushings is
considerably tougher and longer wearing than the brass ones, and it's pretty
cheap as well. I can get 40 feet of 1 inch plastic rod for $1.50 a foot,
delivered. The 1" long sintered bushings I'm using are $1.50 each, so I
could make about 7 or 8 HMD plastic bushings for the same cost as one
sintered one (ignoring my time and electricity costs for the lathe). I
think the increased durability would pay for time and effort, plus the
flanged bushing shape is very simple and very fast to make.
> > After the current python project is finished to my satisfaction, I am
> > going
> > to build another
>
> 25hz, it seems you prefer building to riding ;-)
>
> > but I am going to use pillow block roller bearings.
>
> Similar to the attached ones?
> Can one split the housing in halves?
>
> > and the best part, they are tapered like wheel bearings on cars
>
> For my P4 I used car wheel roller bearings. I got them for free from the
> junk yard. They are indestructible and easy to build in, if you have
> access to a lathe.
>
> > The bushing solution was simple, fast and inexpensive, BUT, the
> > bushings will not last like ball bearings would because the load
> > isn't in the direction that bushings seem to be designed for.
>
> Now, finally some practical experience!
>
> > On a trike, this procudes tight and sometimes "sticky" steering -
> > which is not necessarily a big deal because it can always be
> > muscled through by using the handlebars. That same tightness
> > on a python, I think, might make smooth, small corrections very
> > tough to do.
>
> The "break loose momentum" of bushings within handlebars
> steering should be more disturbing, because the lever arm of
> the leg steered python is much longer and the legs are much
> stronger. Hope s.o. gives that idea a try some day.
============================================================
This is the Python Mailinglist at freelists.org
Listmaster: Juergen Mages jmages@xxxxxx
============================================================
Other related posts:
