BREAKING NEWS -- BROKEN CRANK

I just broke my probably 8th crank, but who's counting. I was out of the saddle, sprinting full blast up a 100 yard 5% grade in light traffic getting over to a left turn shelter/lane. In fact, I had taken the lane way earlier than usual because I had such a good head of steam up. Snapped the right arm which caused me to veer left toward on-coming traffic. I thought I was going down and then recovered and wobbled to the right curb -- waiting to get smacked by the car behind me. Tweaked my back, but it's a wreck anyway..

This was a classic Jobst break right across the pedal eye. The first one of those I've had in two decades. Ultegra 9sp 2-piece Hollowtech. The crank had seen a lot of use over maybe 7 years. I'm not sure of its age. I swapped it off another bike and put it on my Cannondale CX when I got tired of buying ISIS BBs for the OEM TruVativ crank on that bike. It was scuffed, but not around the pedal eye. My first broken 2-piece. I'm so proud!

The bummer is that I left my pedal on the dark pavement. I'm going to look for it tomorrow on the way to work. It didn't stick to my foot as usual. Luckily, I was only a half-mile or so from home and could ride home one-legged.

I snagged the Ultegra crank off my super swanky CAAD 9 rain bike so I can ride to work tomorrow. I'll get a new compact for the rain bike. The other bummer is that when I took the crank out of my CAAD 9, the right BB30 bearing is already shot (I use press in bearings with the Wheels Mfg Shimano adapters). I dread knocking that out because I used a tough adhesive when I put it in.


-- Jay Beattie.

On 19/11/14 15:40, jbeattie wrote:
I just broke my probably 8th crank, but who's counting. I was out of the saddle, sprinting full blast up a 100 yard 5% grade in light traffic getting over to a left turn shelter/lane. In fact, I had taken the lane way earlier than usual because I had such a good head of steam up. Snapped the right arm which caused me to veer left toward on-coming traffic. I thought I was going down and then recovered and wobbled to the right curb -- waiting to get smacked by the car behind me. Tweaked my back, but it's a wreck anyway.

This was a classic Jobst break right across the pedal eye. The first one of those I've had in two decades. Ultegra 9sp 2-piece Hollowtech. The crank had seen a lot of use over maybe 7 years. I'm not sure of its age. I swapped it off another bike and put it on my Cannondale CX when I got tired of buying ISIS BBs for the OEM TruVativ crank on that bike. It was scuffed, but not around the pedal eye. My first broken 2-piece. I'm so proud!

The bummer is that I left my pedal on the dark pavement. I'm going to look for it tomorrow on the way to work. It didn't stick to my foot as usual. Luckily, I was only a half-mile or so from home and could ride home one-legged.

I snagged the Ultegra crank off my super swanky CAAD 9 rain bike so I can ride to work tomorrow. I'll get a new compact for the rain bike. The other bummer is that when I took the crank out of my CAAD 9, the right BB30 bearing is already shot (I use press in bearings with the Wheels Mfg Shimano adapters). I dread knocking that out because I used a tough adhesive when I put it in.



Glad you didn't come off.

I've never broken a crank. Probably not heavy enough and/or strong
enough. I broke a Shimano cartridge BB axle years ago, before I swapped
to Campag.

--
JS

On Tuesday, November 18, 2014 11:40:26 PM UTC-5, jbeattie wrote:
I just broke my probably 8th crank...

Wow. Glad you're OK. Sounds like a very scary incident.

- Frank Krygowski

jbeattie writes:

I just broke my probably 8th crank, but who's counting. I was out of
the saddle, sprinting full blast up a 100 yard 5% grade in light
traffic getting over to a left turn shelter/lane. In fact, I had taken
the lane way earlier than usual because I had such a good head of
steam up. Snapped the right arm which caused me to veer left toward
on-coming traffic. I thought I was going down and then recovered and
wobbled to the right curb -- waiting to get smacked by the car behind
me. Tweaked my back, but it's a wreck anyway.

This was a classic Jobst break right across the pedal eye. The first
one of those I've had in two decades. Ultegra 9sp 2-piece Hollowtech.
The crank had seen a lot of use over maybe 7 years. I'm not sure of
its age. I swapped it off another bike and put it on my Cannondale CX
when I got tired of buying ISIS BBs for the OEM TruVativ crank on that
bike. It was scuffed, but not around the pedal eye. My first broken
2-piece. I'm so proud!

I've only broken one crank, and considering my lack of mass even that is
surprising. It was one of the early two pieces, a SweetWings crank.
The shell that is the left side of the axle sheared. The failure was
non-dramatic; it felt weird for about a quarter of a mile, then the left
crank turned independently of the right, then fell out. A teammate gave
me a push up a half mile climb, then I rode the remaining dozen miles
back on my own, one legged.

--
Joe Riel

jbeattie wrote:
I just broke my probably 8th crank, but who's counting. I was out of the
saddle, sprinting full blast up a 100 yard 5% grade in light traffic
getting over to a left turn shelter/lane. In fact, I had taken the lane
way earlier than usual because I had such a good head of steam up.
Snapped the right arm which caused me to veer left toward on-coming
traffic. I thought I was going down and then recovered and wobbled to
the right curb -- waiting to get smacked by the car behind me. Tweaked my
back, but it's a wreck anyway.

This was a classic Jobst break right across the pedal eye. The first one
of those I've had in two decades. Ultegra 9sp 2-piece Hollowtech. The
crank had seen a lot of use over maybe 7 years. I'm not sure of its age.
I swapped it off another bike and put it on my Cannondale CX when I got
tired of buying ISIS BBs for the OEM TruVativ crank on that bike. It was
scuffed, but not around the pedal eye. My first broken 2-piece. I'm so proud!

The bummer is that I left my pedal on the dark pavement. I'm going to
look for it tomorrow on the way to work. It didn't stick to my foot as
usual. Luckily, I was only a half-mile or so from home and could ride home one-legged.

I snagged the Ultegra crank off my super swanky CAAD 9 rain bike so I can
ride to work tomorrow. I'll get a new compact for the rain bike. The
other bummer is that when I took the crank out of my CAAD 9, the right
BB30 bearing is already shot (I use press in bearings with the Wheels Mfg
Shimano adapters). I dread knocking that out because I used a tough
adhesive when I put it in.



Tough break but glad to hear you stayed off the tarmac.



--
duane

On 11/18/2014 10:40 PM, jbeattie wrote:
I just broke my probably 8th crank, but who's counting. I was out of the saddle, sprinting full blast up a 100 yard 5% grade in light traffic getting over to a left turn shelter/lane. In fact, I had taken the lane way earlier than usual because I had such a good head of steam up. Snapped the right arm which caused me to veer left toward on-coming traffic. I thought I was going down and then recovered and wobbled to the right curb -- waiting to get smacked by the car behind me. Tweaked my back, but it's a wreck anyway.

This was a classic Jobst break right across the pedal eye. The first one of those I've had in two decades. Ultegra 9sp 2-piece Hollowtech. The crank had seen a lot of use over maybe 7 years. I'm not sure of its age. I swapped it off another bike and put it on my Cannondale CX when I got tired of buying ISIS BBs for the OEM TruVativ crank on that bike. It was scuffed, but not around the pedal eye. My first broken 2-piece. I'm so proud!

The bummer is that I left my pedal on the dark pavement. I'm going to look for it tomorrow on the way to work. It didn't stick to my foot as usual. Luckily, I was only a half-mile or so from home and could ride home one-legged.

I snagged the Ultegra crank off my super swanky CAAD 9 rain bike so I can ride to work tomorrow. I'll get a new compact for the rain bike. The other bummer is that when I took the crank out of my CAAD 9, the right BB30 bearing is already shot (I use press in bearings with the Wheels Mfg Shimano adapters). I dread knocking that out because I used a tough adhesive when I put it in.


-- Jay Beattie.


Ouch. Happy healing!

Loctite 242 breaks down at nondestructive hair-dryer
temperatures, lower than paint damage temps.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971

popularrrrrrrrrrrrrrrrrrrrrrrrrrrrrerk subject

note the practicalmachinist forum

https://www.google.com/#q=temperatur...elease&spell=1

I had used a pinpoint propane nozzle with thick aluminum foil backing protecting seals and innards. Shimano seals are relatively heat tolerant of heat flowing thru metal and air without direct flame contact.

but using a heat gun is a better idea

On 11/19/2014 8:37 AM, AMuzi wrote:


Loctite 242 breaks down at nondestructive hair-dryer temperatures, lower
than paint damage temps.

As mentioned before, I didn't know that. I thought higher temperatures
were needed. I'll keep that in mind.

But from the link that Gene gave, this was interesting:

After heating: "Then touch a bar of Bees Wax to the joint. The stud will
come out, The Bees wax will penetrate the thread and kill the loctite."
Another poster in that discussion confirmed the bee's wax usefulness.

Does Grant Peterson know this? He touts bee's wax as an alternative to
Loctite, but doesn't mention it as an actual anti-Loctite.

(I was going to call it an off-label use, but in Grant Peterson's view,
nothing is off-label for bee's wax.)


--
- Frank Krygowski

On Wed, 19 Nov 2014 07:37:30 -0600, AMuzi wrote:

Loctite 242 breaks down at nondestructive hair-dryer
temperatures, lower than paint damage temps.

Some more detail on thread locking goo removal:
http://us.henkel-adhesives-blog.com/post/All-About-Threadlockers/How-to-Remove-Red-Threadlocker/

I've only broken one crank. However, I cheated. The crank had a hair
line crack at the pedal threaded hole, and I broke it by jumping onto
the pedal during a standing start. Since I wasn't moving at the time,
all I did was land rather painfully on the top tube.



--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

https://www.google.com/#q=OLD+SAYINGS:+BEES+WAX

bee's wax, whale oil, wood wood wood, ....

let's there's gasket shellac and boiled linseed oil. Both give 2-3 pounds yield useful under a lock washer esp a toothed ring lockwasher. Non essential auto bolts..there are no not essential cycle bolts...in the environment are bolted down with linseed preventing rust.

I did that a few minutes ago after dropping a new ratchet combo 5/16th's into the below battery area..batt tray getting linseeded bolts.

Main diff tween shellac and linseed at this time (???caws I dunno ) is shellac doesn't fuzz up with dirt but lacks linseed specific gravity and rusto qualities.

JB ? I unconsciously look at JB's group as not ( Brandt excepted ) using 7 year - is this a skin problem ? - old components as they all looklike junior achievers recycling aluminum at Shimano's obsolescence directives.

there's more to this ride to wrk ethic than sport....

I would bet on a very hi percentage 0f 7 year old shimano racing or wannabe racing equippe showing cracks when tested: 72%

I had a failed seat post from the baseline seatpost people, replacing I bought 2 as the diameter is a PITA. I was riding into Cocoa Beach, stunned by not having the post jammed into my asshole.

next 10 days, rode from the rear rack.