Current Projects chat and miscellany

half-link. They stretch a lot

Data?

I have no idea if they do wear quicker, or not. But because they have more pivot points, would this mean that wear at each would lead to greater overall "stretch"?

Finished for now, change of bars, bb and cog and clips and straps at last

1 Attachment

Data?

this also needs your attention https://www.lfgss.com/thread38914.html

I have no idea if they do wear quicker, or not. But because they have more pivot points, would this mean that wear at each would lead to greater overall "stretch"?

what you mean? they have the same number of pivot points. the tension of a normal chain is not enough to stretch straight links, so the material won't stretch, but i don't know if the tension is enough to "flatten out" the bent links or not.

Finished for now, change of bars, bb and cog and clips and straps at last

that hubs look a bit tacky, what are they?

phil woods ed, they actually look a lot better closer up, I know probably not your cuppa mate but each to their own hey?

oh they were phil wood? whoop! my bad.

Oh eddy.

Stick to your guns Ed, regular Phils are tasty but those super over sized ones are tacky, especially in gold.

love it when you play tough!

They are a bit garish.

I know, bloody awful aren't they....

Data?

I'm wanting to get a couple half link and regular chains in some kind of test rig and measure their extension. More practical concerns (thesis) are getting in the way.

I'm wanting to get a couple half link and regular chains in some kind of test rig and measure their extension. More practical concerns (thesis) are getting in the way.

Simplify the experiment by joining a half link and a regular chain, half and half, on the same bike. That way, you know that both chains are exposed to identical conditions.

the chains aren't going to wear differently. no need to test it. move along.

the chains aren't going to wear differently. no need to test it. move along.

Do you have data to which well, is it is not privy?

How do you know? Surely they do have more pivots than a normal chain, no? Or have I got it totally wrong*

*most likely

My last year's winter project: Ciöcc frame fully equipped with Campagnolo Chorus.

A full description of project and components can be found here.

More pics on this album.

So far it has been a pleasure to ride for 50-60 km outings at a relatively leisure pace with nice, dry weather.

Frame is fine but will consider replacing it for something more 'exclusive' in the near future.

It does really deserve some handmade Italian tyres but what lovely bike - what a great job - well done :)

Simplify the experiment by joining a half link and a regular chain, half and half, on the same bike. That way, you know that both chains are exposed to identical conditions.

Nice. A good idea, I hadn't thought of.

Do you have data to which well, is it is not privy?

I meant to test the idea that half link chains stretch by extension of the plates (plates straightening at their bend). So I was thinking putting a half link chain in some kind of tensile test machine, loading it up until i saw plastic deformation, then deciding if the load applied was anywhere near a realistic load from pedalling.

Totally a half-formed idea, but you're quite right to say "data?". I agree.

Or have I got it totally wrong*

Yes.

A normal chain has two pivots in each inner link (the rivets are fixed to the outer links and don't pivot in them) A 100-pitch length has 50 inner links, so 50x2=100 pivot points

A "half-link" (cranked link) chain has one pivot in every link - the thin end has a pivot, the thick end has the rivets fixed to it. A 100-pitch length has 100 links, so 100 pivot points

So I was thinking putting a half link chain in some kind of tensile test machine, loading it up until i saw plastic deformation, then deciding if the load applied was anywhere near a realistic load from pedalling.

I just looked at data sheets for similar sized straight and cranked link chains (huge ones, for drawing bench use, 3.5" pitch x 1.5" roller width), and they gave identical ultimate tensile strength for both types.

HMS HHSB

That is a great photo - spot on son

Interesting. Are bike chains made compliant to ISO 3512? ISO 10190? Maybe I will give that a read.

That's great Max, what a treat. Isn't the stem too short though?
; )

Yep, it does look short and shriveled in real life compared to the big arse frame and fat tubing.

How do you know? Surely they do have more pivots than a normal chain, no? Or have I got it totally wrong*

*most likely

same number of pivots dude. i can't be bothered to take this further.