Syncros angle/slanted stem cap alternative

mattr

Old School Grand Master
:D I just saw this thread pop to the top and wonder if anyone had suggested 3D printing it yet. (My top cap split about 20 years ago when i crashed......)

Even a tiny hobby grade 3D printer should be able to knock one out in an hour, might need a bit of finishing though!
 

jax13

Senior Retro Guru
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dongward":30ozp2w1 said:
jax13":30ozp2w1 said:
https://www.thingiverse.com/search?q=Syncros&type=things&sort=relevant

Would this be worth a shot?

I've got a 3d printer sitting idle here at the moment and am happy to print a few for the forum and send them out to see if they work / hold up.

I would say so - the latter Syncros caps were plastic so it should work... also blue ano syncros stem...? It would be interesting to see how long it took/how much material to be able to gauge a cost for production and P+P.

D

p.s. interesting find!

I'll throw a few put tonight once I've put the boy to bed.

Anyone who wants to trial one, pm me with an address and I'll send one through because I dokt think I've got my syncros stem anymore
 

dongward

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jax13":24eg74er said:
dongward":24eg74er said:
jax13":24eg74er said:
https://www.thingiverse.com/search?q=Syncros&type=things&sort=relevant

Would this be worth a shot?

I've got a 3d printer sitting idle here at the moment and am happy to print a few for the forum and send them out to see if they work / hold up.

I would say so - the latter Syncros caps were plastic so it should work... also blue ano syncros stem...? It would be interesting to see how long it took/how much material to be able to gauge a cost for production and P+P.

D

p.s. interesting find!

I'll throw a few put tonight once I've put the boy to bed.

Anyone who wants to trial one, pm me with an address and I'll send one through because I dokt think I've got my syncros stem anymore

Seeing as how no one has stepped up to try this ( I'm assuming), I will throw my hat in the ring - I was only hesitant as my stem is up in Skye and I'm in Edinburgh... but I will be up there in the next few weeks. I have a 1" 1/8 hinge fron cattle prod that's been religated to the parts bin due to the original plastic wedge imploding and finding the bucket in a rage... I'll PM you an address the now
 

FluffyChicken

Archivist
Retrobike Rider
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I tend to use round ones that can take a bolt not going straight down or better the old deep aheadset/diacomp/.. plastic ones work fine.
They may not look as tidy, but the style that are flat and round are not much better (they have Syncros etched into them). but they are much stronger than the naff sycnros plastic things they made.

That links not working for me, but if it's the one I think it is, then the recess is nice, the top just needs to be made felt with either a normal bolt or the later countersunk bolt design. I never got around to trying it.

I do have originals, but you know, never find them when you need them.

to be honest, once bolted down with a normal topcap or similar to get the compressing, a push in fake on will be fine and dandy.

The best upgrade for Sycnros stems are the later 'GT' era twin clamp and push bit style cinches.
 

jax13

Senior Retro Guru
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Re:

The file in question has a dished top and not a proper countersink recess but it shouldn't take much to tweak it in a cad program to have a proper (and strong enough) countersink to take a proper bolt.

Getting the angle and diameter dialled in is the key.

Once that's sorted I'll play with the top & make a batch of 'retrobike' embossed ones and run a big batch off of somebody who is a bit more active on the forum wants to go 50/50 on the deal with me and I'll send batches to them to sell individually.
 

alderwick

Dirt Disciple
Re:

Did anyone manage a successful run of slanted top caps in the end? The amount of things I always think should be easy enough to print I might as well take a course in producing the files...
 

jax13

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The main issue was strength, if they had adequate torque in them they started to delaminate, I suppose this could be avoided by printing them vertically but that has its own implications.

Printing in abs would potentially help a lot as it is a physically stronger plastic but without making them overly large and clunky looking, the strength I'd want from them just isn't there unfortunately.
 

Rampage

Retrobike Rider
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Re: Re:

Gerard":3iokqblk said:
I have the same dilemma re stem cap. :facepalm:
In my search I found this. It seems even Syncros made adapters to take a regular cap which they were sending out! Not attractive....but does the job.

470226d1247620325-syncros-slanted-stem-caps-dscn2618.jpg


I think I'll do the same....though I can't believe it would be difficult to machine one up. As one chap on a forum pointed out:
It's a three step job, creating the base in a lathe (green), the next sawing the top (blue) in the correct angle and lastly 'manually' adapting the top (red)

468971d1247158348-syncros-slanted-stem-caps-path3218.jpg


That looks like one of the ones I made years ago.
 
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