Does re-plating a part make it weaker?

[fordmike65]

You never see a Colson crank do this.

@cyclingday 😕

 

[ballooney]

You never see a Colson crank do this.

Colson? Never heard of them!

 

[ballooney]

Hate to admit it but....this has happened to me twice now. First time kinda made since as it happened to a rusty and crusty '40 straight bar...Yes @fordmike65...a Schwinn...sigh! Same point of failure.

 

[GTs58]

Hate to admit it but....this has happened to me twice now. First time kinda made since as it happened to a rusty and crusty '40 straight bar...Yes @fordmike65...a Schwinn...sigh! Same point of failure.
View attachment 1776866

Must’ve been the original chroming that did that. Ha ha

 

[Schwinn Sales West]

Must’ve been the original chroming that did that. Ha ha

I think he had "too high of a gear on it". Drop that 52T down to a 46T and "spin it a little".

LOL
John

 

[ballooney]

I think he had "too high of a gear on it". Drop that 52T down to a 46T and "spin it a little".

LOL
John

Nah...46T look lame...just run a larger cog on the hub to tone it down.

 

[dogdart]

I used to ride with a big guy (280+). On 2 separate occasions, he snapped post war Schwinn cranks in the same fashion. I wonder if Schwinn hardened there cranks, as I have had quite a few non Schwinn cranks that bend🤔

 

[Kickstand3]

@cyclingday 😕

Yeah seems like I saw Marty’s sweet commander crank break off in two

 

[Kickstand3]

I used to ride with a big guy (280+). On 2 separate occasions, he snapped post war Schwinn cranks in the same fashion. I wonder if Schwinn hardened there cranks, as I have had quite a few non Schwinn cranks that bend🤔

That’s cause there’s more schwinn s out there
All bikes can have this issue with out the proper care
and maintenance. There’s no invisible Cows out there !

 

[Schwinn Sales West]

I used to ride with a big guy (280+). On 2 separate occasions, he snapped post war Schwinn cranks in the same fashion. I wonder if Schwinn hardened there cranks, as I have had quite a few non Schwinn cranks that bend🤔

You could answer your question by simply taking a file to test the metal surface hardness. I do not believe they were case hardened.

Hardening would cause another set of problems. Hardened metal breaks "clean", think the way glass breaks.

Just a thought.
John