SH splined hub

The hub that Harper is using is the 'KH style 8 spline hub with
scalloped flanges' (http://gallery.unicyclist.com/KH_style_hub) by Steve
Howard. See page 2 of the gallery to see the hub with the customized
red Kooka cranks.

I can see I'm going to have a lot of entertainment on our future Seattle
muni rides as Harper tries to break the hub. 🙂

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john_childs - Guinness Mojo

john_childs (at) hotmail (dot) com
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Is "broaching" the process of cutting internal grooves by pressing a
multi-faceted cutter through a hole? Cool. A new term.

Steve, you have a really cool job. AWESOME work. I particularly like
the fact that the flanges are fat, have a lot of meat outside the spoke
holes, and are bead blasted. There is no way those will fail, even on a
U-turn tensioned Coker wheel that gets stomped.

How do you keep the flanges from coming together on the spindle? The
grooves in the spindle are rounded at the ends, so there is either a
tiny contact point from a sharp-edged flange nubbin (all-purpose
technical term), or the nubbins are rounded and will try to ride up on
the ramps.

Elegant design work, whoever did it. Custom flange spacings look trivial
to do. Perfect for everything, including U-turn style Coker wheels.

Tim

--
cyberbellum - Level 1.0 rider!

I was standing in the park wondering why frisbees get bigger as they get
closer. Then it hit me.
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I was on pins and needles reading Harper's post until I got to this
sentence:

harper said:

*The cranks didn't bend or loosen and the axle didn't twist. *

I was expecting to read:

"The axle snapped like a twig and I was rushed to the hospital for an
emergency saddle-extract-ectomy. Steve will be hearing from my lawyers
soon."

It took Harper about a 1.5 years to twist the first square taper axle I
made him. It took about 1.5 seconds to snap the second one. This new
splined axle should be considerably stronger that either of them ...
we'll see.

cyberbellum - The flanges are kept from sliding together exactly the way
you thought - the end of the splines in the flange "bottom out" in the
rounded grooves of the axle. In addition to that I made the splined
hole in the flanges undersize and used Loctite as a lubricant when I
pressed the flanges on to the axle. The axle actually removed (or
broached) a slight amount of material from the flange hole when they
were pressed on.

I fully intend to make a wide hub like this and build myself a Coker.

SH

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A photo of the 'test' drop is here:

Kris:

http://byronwatt.com/sfu_june26_28.html

Gregs fancy 'foot stall' on his frist attempt:

http://byronwatt.com/sfu_june26_27.html

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JamesH - Back into the swing of things
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Quoted message said:

-originally posted by JamesH- A photo of the 'test' drop is here:

I got one drop off to the right side of the container where I wanted it.
The drop was steeper on that side and the landing was flatter. The mount
was to the crank on the upper tier on the garbage can which is an easy
and stable mount. I went from the crank to rubber on the top, then did
the drop to the right side of the container. Lots of impact, very little
grace or form. I think the photo James Hargrave shows is me failing to
go from the crank to rubber on top on the first attempt.

--
harper - Statuesque

-Greg Harper

B L U E S H I F T

"You go through life and you choose." - Greg Harper

"Find weak people and take stuff from them" - Greg Harper
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It's so cool that Greg is willing to test this hub. The first of my
hubs that he rode finally twisted after about a year. The next one he
tried failed right away. From those two failures I think I learned
something ... and that's the point.

I built two hubs - Greg has one and I just assembled the other one into
a ridable MUni. Just for fun I tried a spoke lacing other than the
standard 3 cross pattern. I think it's called "three leading, three
trailing". I'm sure it's not as strong as a 3x pattern but it looks
pretty swank, especially with the slightly weird "scalloped" hub
flanges. I'm keeping this one and will do my best to abuse it.
However, I'm not anywhere near doing big drops like Greg is ... but I'm
not as old as he is either.

SH

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Steve,

nice looking modification to the bearing holders.

--
jagur - #3649_all fluff i hear?

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[image:
http://gallery.unicyclist.com/albums/albup23/godzilla.gif]-Forget_Your_Life-

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showard said:

*It's so cool that Greg is willing to test this hub. The first of my
hubs that he rode finally twisted after about a year. The next one he
tried failed right away. From those two failures I think I learned
something ... and that's the point.*

No, the point was to build Harper's trust in your equipment while
simultaneously working to minimize the time needed before catastrophic
failure so he'd be caught unawares. You were making such great progress
with your second hub, and I fear you've now set your research back
significantly. On the positive side, Harper clearly has short-term
memory challenges, since the first thing he did with Hub 3 was start
jumping off trashcans.

Let's again enjoy the final moments of Hub 2's life:

http://gallery.unicyclist.com/albux49/IMG_0426

Unless you do something quick to compromise the quality of your work
with Hub 3, the shot below may be a once-in-a-lifetime moment.

http://gallery.unicyclist.com/albux49/IMG_0432

--
tomblackwood - Registered Nurtz

Tailgate at your own risk.....

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