Snapped spindle

[silva]

*Keep on wondering why you keep on mentioning this. You've used it a few times now.
Orbitofrontal Cortex

Because this threads title is "Snapped spindle", and 20 grammes extra spindle weight makes 29% better withstanding torsion force / twisting or stressed less, which may bring the deformation/stress under the spindles endurance limit, that is, no metal fatigue, that is, no topic "Snapped spindle"... ever.
The Spindle keeps on Spinning, which Shimano Salesmen Might Not Like.

 

[EckyH]

Have you ever tried to get hired by Shimano?
Certainly they will appreciate your application - finally there is someone who can tell them how to construct spindles.
Probably knowledge of hammer and chisel works in bicycle mechanics will be welcome.

E.

 

[classic33]

Because this threads title is "Snapped spindle", and 20 grammes extra spindle weight makes 29% better withstanding torsion force / twisting or stressed less, which may bring the deformation/stress under the spindles endurance limit, that is, no metal fatigue, that is, no topic "Snapped spindle"... ever.
The Spindle keeps on Spinning, which Shimano Salesmen Might Not Like.

So you keep on throwing OFC in because this thread is about Shimano? You threw it on other threads that weren't about Shimano.

So I'll refer you back to my question, why?

 

[Webbo2]

This isn't about who blames who, this is about Shimano making their Light Religion for Cheating in Races the Standard for Every Body.
As Mister Hambini worded on:
https://www.hambini.com/shimano-crankset-failures-an-engineering-analysis/

HollowTech 2's 2 pieces were pushed into more pieces by Old McDonald Has A Farm, E-I-E-I-O, like happened to the topicstarter here, only on yet another place on the part.
And why - according to:
https://weightweenies.starbike.com/forum/viewtopic.php?t=176295&start=60
... because they use cheap forging methods, and glue, despite their price their bicycle product 7-8 times higher per gramme material than Rays car wheel rims:
https://www.cyclechat.net/threads/snapped-spindle.309571/post-7602472
... on some minutes driving distance from them.
... Shimano sacrified Safety for every1, just to win a sec a mile for just racers.
... due to decisions towards cheapskate production
... yet tag a price that is 7-8 times Rays'.
The spindle section of the drivetrain part: as earlier in this thread online-calculated https://www.cyclechat.net/threads/snapped-spindle.309571/post-7572484
20 grammes more into the spindles wall would make it 29% better withstanding the torsion force from the left side. The "Angle of twist" is that % lower = less deformation.
https://www.ptsmake.com/the-complet...does_metal_fatigue_occur_below_yield_strength

... if that 29% less deformation would bring it under the endurance limit of the steel wall of the spindle, metal fatigue would not occur, no crack initiation, and ofc also not growing until Shimano Spindle Snap Story Day.

So was that a no to ever having been a bike race because that’s what I asked you. Not to spout some random stuff that only makes sense to you.

 

[silva]

So you keep on throwing OFC in because this thread is about Shimano? You threw it on other threads that weren't about Shimano.

So I'll refer you back to my question, why?

This thread is about a Shimano Spindle section of their Hollowtech2 crankset that broke due to torsion, and my earlier post today https://www.cyclechat.net/threads/snapped-spindle.309571/post-7602829 (again) outlined what Shimano could have done to make it never happen.

Also, my post https://www.cyclechat.net/threads/snapped-spindle.309571/post-7602472 outlined, citing the given source, that Shimano combines cheap forging technique, given cause for crank falling apart, with 7-8 higher price per unit material than Japans Rays rims just some minutes car driving away from Shimano's headquarters.

Why: to address the problem of this topic with a cause and a solution, OFC.
Since ignoring them or whining about them doesn't solve problems, OFC.
So, your so-called repeated question here, has been given these Captain Very Obvious answers about a GaZillion times by now.
Are you Shuuuure You're Willing Answer?
Because, it doesn't look like it, Mister classic33.
I think you are just jesting while trying to go offtopic in Galaxies Far Far Away.

 

[classic33]

This thread is about a Shimano Spindle section of there Hollowtech2 crankset that broke due to torsion, and my earlier post today https://www.cyclechat.net/threads/snapped-spindle.309571/post-7602829 (again) outlined what Shimano could have done to make it never happen.

Also, my post https://www.cyclechat.net/threads/snapped-spindle.309571/post-7602472 outlined, citing the given source, that Shimano combines cheap forging, given cause for crank falling apart, with 7-8 higher price per unit material than Japans Rays rims just some minutes car driving away from Shimano's headquarters.

Why: to address the problem of this topic with a cause and a solution, OFC.
Since ignoring them or whining about them doesn't solve problems, OFC.
So, your so-called repeated question here, has been given these Captain Very Obvious answers about a GaZillion times by now.
Are you Shuuuure You're Willing Answer?
Because, it doesn't look like it, Mister classic33.
I think you are just jesting while trying to go offtopic in Galaxies Far Far Away.

You're the one off-topic lad.

You, with you're nearly toothless drivetrain. Badly loaded bike(s), where the frames have failed, claim to know better than trained designers. I doubt that very much.

 

[Dogtrousers]

50 pages! Woo hoo!

By the way I've just installed a new HT crankset on my bike. I took it out for a spin on Saturday and I didn't die! I wasn't even injured!

 

[fossyant]

Pity our friend has nothing really useful to contribute to the forum other than argue !

 

[EckyH]

Pity our friend has nothing really useful to contribute to the forum other than argue!

Au contraire!
Broken off teeth on sprockets and chain rings for seven years and the washing lines!

E.

 

[raleighnut]

Au contraire!
Broken off teeth on sprockets and chain rings for seven years and the washing lines!

E.

Don't forget 'tuning' sprockets with an angle grinder

 

[Webbo2]

Don't forget 'tuning' sprockets with an angle grinder

Nobody but a bike thief should go near a bike with an angle grinder.🫣

 

[classic33]

Don't forget 'tuning' sprockets with an angle grinder

It's a non-running table grinder he uses.
"I said a table grinder not "a running grinder"."
https://www.cyclechat.net/threads/snapped-spindle.309571/post-7583076

 

[Webbo2]

It's a non-running table grinder he uses.
"I said a table grinder not "a running grinder"."
https://www.cyclechat.net/threads/snapped-spindle.309571/post-7583076

That makes all the difference then.😉

 

[classic33]

That makes all the difference then.😉

A non-running table grinder would be the safest one though.

 

[EckyH]

Nobody but a bike thief should go near a bike with an angle grinder.🫣

You don't know how right you are.
I bought a second hand frame (for the record: the seller was in Germany, not in Belgium). We agreed that he removes cranks (square taper!) and bottom bracket and sells it seperately. I paid the frame and shipping and waited. So far so good, but then that ... guy destroyed the threads in the left (square taper!) crank while trying to get it off. That was his problem, not mine. Then - without confering with me - he took an angle grinder, cut off the spindle with the crank and of course he hit the bottom bracket shell with the running angle grinder. 🤦‍♂️
Fortunately it was only roughly one millimeter and the left side and my plan was to use the frame with a cartrige bottom bracket for square taper cranks. Fortunately again I have a face milling tool for bottom bracket shells and know how to use it.

And the moral of this story: https://www.cyclechat.net/threads/snapped-spindle.309571/post-7603307

E.