Well, it's been a frustrating week in the shop.
The morning temps this week were not very
conducive to efficiency...4 degrees, -1 degrees, -9 degrees, -19 degrees! We've been basking in daily highs of somewhere between 0 and 8 degrees, translating into VERY cool temps in the shop.
I know it's too cold when my nipples are sticking out through my
tyvec paint suit...not a pretty sight, even to visualize ;)
So, despite a bunch of paint work I needed to get done, I found myself fiddling around until I would get too cold and then head home to do some computer and end of the year book work. Not stuff that fires up the blog.
Despite that, I do have two things to share; the first is a bit of a rant and educational opportunity, the second is the stuff that makes the
internet so dangerous and fun...rumors and
here say (closely tied to the rant, eh?)
THE SET UP...I don't have a lot of time to cruise the forums, but do try to give a
looksy to keep up with what's happening in the industry, trends, and consumer queries. One item that I stumble upon with quite some frequency are threads about product failures. I find these to be of interest as there is much to be learned...mostly construction methods, material analysis, and engineering shortcomings is the perspective I read from. When read from this perspective, there is much good info to share and gain, for both the consumer and other builders. Unfortunately, most of these threads turn negative, either due to a poor customer care, lack of information, or just someone who chimes in with an axe to grind. What is really a shame is that often these postings are made before the builder is contacted and given an opportunity to deal with the issue.
From a builder's perspective, I want each of my products to perform at the highest level and that requires much from me;
-a strong foundation of experience with fabrication
- a fundamental knowledge of material properties with regard to application, durability, and joining methods
- proper information sharing with the customer to ascertain the rider's physical needs, intended use, and external forces likely to be placed upon it
- selection of the appropriate materials (type, wall thickness, production quality)
- critical control of the fabrication process and environment
Each of these areas are required and each offer multiple opportunities for deficiencies if not focused on and adhered to.
So given that, here's the
awful truth of building in the bicycle industry...
- Things will break.
- Customers can be injured due to failure.
- Your success as a professional hinges not on how much product you send out or money you make, but on how you value and prioritize your customers' health and happiness.
THE STORY...So, in that vein, as I've got enthusiasts, customers, and fellow builders who peruse these pages, I want to share my first product failure with y'all.
I've always been an ardent believer in fabricating products that make folks smile, building with a certain priority
hierarchy; function, durability/safety, performance, and final physical weight last.
In this case, the item is a one piece bar/stem combo that was made for Roy's Yo Eddy
esque bike from last year. Roy was very focused on what he wanted in regard to specs and design and in speaking with him, I felt comfortable that his desires were well founded in years of experience and personal expertise. Where my failure lies is that I did not formulate a good understanding of his physical size, so when I built the bar, I used a material that was too light, not providing the durability/longevity that was needed.
Ultimately, there is only one end result, the material began to
yield and crack.
In Roy's own words...
"Just got back from my little trip through the local forest (trying to do that at least twice a week) and
discovered some cracks on the
barstem combo they're near the connection of the bar to the stem on both sides (see pics).... must admit it got me scared a bit, but as there are no
squeky or cracking sounds I'm hoping it's the paint only...... just wanted to confirm this and wanted to know your thoughts about this....."
In the pic above, you can see the fracture beginning in the
HAZ (heat affected zone) and extending up the bar, perpendicular to it's length. The
HAZ is often the weakest portion of the joined material, as the molecular structure is disrupted, the reason it is so important with thin bicycle tubing to be as proficient as possible in minimizing heat application time.
A handlebar is a high liability piece, as it becomes a violent lever, testing the materials fatigue ability every second it is being utilized. I commonly build a combo of this type with .035" wall for the main bar, .049" wall for the extension "stem", and custom turn the id of the
steerer piece down from a thicker walled piece dependant on the
steerer tube requirements.
For this build, I wanted to push the envelope a bit for a high
zoot piece. Not surprisingly, this is the only bar I've ever built with .028 tubing in the main bar section that has not been heat treated (a process that stabilizes the molecular structure post fabrication) and it is the only bar I've had a failure of.
LESSONS LEARNED...Check your bike and components over at least once a week...cracks in the paint are
almost always an indicator of trouble below.
Talk with a trustworthy professional for his
opinion if you suspect an issue may be present. Believe me, your builder will WANT to be the first to know...your safety is paramount.
Don't be afraid to ask questions or ask for explanations. This is your opportunity to learn from the experience and it should be positive, enriching your relationship with your builder.
For me...I know what works and what the material's limitations are. I allowed my desire to push the envelope a bit coupled with insufficient customer info to
expedite this potential to reality.
END RESULT...Roy's been a peach and will soon have a replacement combo on it's way to him free of charge. Every item I make has a lifetime warranty...you've entrusted me with your safety and fun, it's my responsibility to ensure it happens.
Hopefully, everyone picked up a little something from the experience.
Now, onto part two...the RUMOR MILL. (purposely vague to protect the innocent)Lots of you know that I love the old steel bikes that brought me to where I am today. I tend to have a soft spot for these, and the shelves are filled with restorations just waiting for time to sneak them into the schedule. In doing some of this work, I have the opportunity to talk with some of the old school folks who worked in the era, some still chugging it out today.
This week I was working on some research for a few
restos I have coming up and was dropped a bit of a potential bomb. Seems a certain East Coast company favored in the 80's and 90's that is responsible for spawning many current builders today may be jumping back into the fray. Details are sketchy (thus the rumor part), but the first lady placed a large order for decals to adorn the newly manufactured frames. Who is making the frames and to what degree business will be renewed is a bit cloudy, but it looks like folks will have the opportunity to yell "YO, that's Wicked!" again very soon. Best wishes on the re-launch W.
cheers,
rody
I began by carefully sawing the post into four segments, hoping to create some relief to remove the pieces.
Cutting all done, let's try to peel away some pieces parts ;)
After much work, I was able to free the remaining post. The aluminum had chemically bonded to the interior of the steel seat tube, leaving only a galvanic dust behind. Here's Mike, relieved to be finished with the process...
The seat tube escaped unscathed, minus a little paint from the operation. A quick pass with the reamer and admonishment to grease his post when he lubes his chain ended the day.
The aftermath...
Steven drove up from Virginia today to visit the shop, get measured, and talk old bikes as well as his new project; a killer Klunker geared build...the tough decision being what wheel size to decide on, 650 or 29, hmmm.
This process works equally well on stays or any other manipulated Ti piece. 
Suffice it to say, Nutella, a chocolate hazelnut spread, was a big hit with Christi, so we hooked up with some of that to take home :)
I do enjoy exploring some of the local culture and small shops is one outlet for that, so while the girls were shopping, I did some exploring of my own.
