Snapped spindle

Status
Not open for further replies.
Page may contain affiliate links. Please see terms for details.
OP
OP
R

roubaixtuesday

self serving virtue signaller
bigger mating surfaces

Matron!
 

silva

Über Member
Location
Belgium
Apehangers?

Chapeau for gratuitous use of the worst "gusset".
https://www.gussetcomponents.com/product-category/chains-chain-devices/
chgu-tank-cp1.jpg

... ordered from NL shop in 2017 and 2018 (I stockpiled a dozen).
... it quadrupled the chain life I had with the first (a basic-dimensioned KMC)
I said "Chapeau".
Later on, I discovered that type 420 chains are also compatible with bicycle sprockets, and gave it a try.
It worked, I stockpiled again, and since, I mounted those instead of Gusset Tank, since they were greased instead of oiled, and thus rust easier.

It was first claimed that my continued sprocket usage (teeth broke off) posed a danger to myself.
Then it was claimed that it posed a danger to others.
Then that my motorcycle chain would be dangerous.
None of those claims were supported / explained.
Also despite I reported no problems with it over the entire period.
Without a derailer, and a sufficiently tensioned chain, how can a chain get off its sprockets? It's just a matter of not allowing the slack to increase that much.

My conclusion: the claims are unfounded, it's just scaremongering with irrelevant motives.

While a crank/spindle break, were this topic reports an example case for, is a clear danger / safety risk. Same for Shimano's hollow cranks breaking apart.
Such parts should never fail, as said, because it's human leg power, which is known, and unlike overload on a wheels axle, can't be changed.

A spindle/shaft break can be avoided by simply putting a reserve in the mechanical design. As I illustrated with figures in the online calculator, a 50% wall thickness increase, of the HollowTech2 design, towards the inside, adds a 29% torsion resistance at a weight "penalty" of 20 gram, as resulted by another online calculator, both linked here.
The "win" of Shimano's Hollow Light Religion (its entire assembly) to cheat in races, is reported as 130 gram compared to square taper assembly.
That safety reserve of 29% would reduce that "win" to 110 gram.
Yet, some here seem to equal such weight-again-increase as their conviction to the death penalty in race.
:smile:
 
OP
OP
R

roubaixtuesday

self serving virtue signaller
Impressive if you plan on cycling at 189 years old !

This thread will still be going in 189 years, I think.
 

silva

Über Member
Location
Belgium
So with stockpiling chains, and your reluctance to change them, have you just wasted a load of money that you were trying to save. Impressive if you plan on cycling at 189 years old !
I said the stockpiling of chains evaded the later 30% price increase.
For your information - this practice is named "hampstering".
If price would have stayed, it wouldn't have made a difference > break even.
If price would have decreased, it would have been a bad decision > loss
If price would have increased, it would have been a win decision > win
Speculation For Dummies. ;)

About your claim "reluctance to change chains" - I replace chain when tensioner arrived at its end, a proper tension is needed, as said and as described in detail.
So your claim is wrong.
I DID became reluctant to change sprockets, Please Pay Attention! ;)
Also, I became reluctant to use Hollow Technology, due to Bad Experiences.
Which this topic is an example case of.
I don't want to Limp on 1 Leg back or further home or for the rest of my Life LoL. ;)
 
Status
Not open for further replies.
Top Bottom