Find the flaw: Expert version
Likes For altenwrencher:
#5
Senior Member
Join Date: Oct 2013
Location: Mich
Posts: 7,873
Bikes: RSO E-tire dropper fixie brifter
Liked 3,306 Times
in
2,098 Posts
if you're hungry, go make a sandwich... don't be chomping on hub parts!
__________________
-YMMV
-YMMV
#6
Likes For ign1te:
#7
Bits of extraneous metal jammed in the freewheel? Guessing, I've never had much to do with these, I used to be good with Sturmey Archer.
#8
Senior Member
#10
SE Wis
Join Date: Apr 2005
Location: Milwaukee, WI
Posts: 10,820
Bikes: '68 Raleigh Sprite, '02 Raleigh C500, '84 Raleigh Gran Prix, '91 Trek 400, 2013 Novara Randonee, 1990 Trek 970
Liked 3,659 Times
in
2,204 Posts
Never had one of these open but What's going on here.
#12
At midpoint there appears to be a dog-clutch, thin metal cylindrical part with axial tabs, that appears to perhaps be missing a section between tabs. Hard to see with all the grease.
Just to the right of that, looks like a ring of some sort with a good chunk of it missing.
Also the cylindrical section to the left of the right caged bearing, someone had mentioned a chunk lower in the picture, but the same part high in the picture also looks chewed. Inside of that, the planet gears look not fully engaged, partly slid out axially.
Just to the right of that, looks like a ring of some sort with a good chunk of it missing.
Also the cylindrical section to the left of the right caged bearing, someone had mentioned a chunk lower in the picture, but the same part high in the picture also looks chewed. Inside of that, the planet gears look not fully engaged, partly slid out axially.
Last edited by Duragrouch; 05-14-24 at 01:46 AM.
Likes For Duragrouch:
#13
At midpoint there appears to be a dog-clutch, thin metal cylindrical part with axial tabs, that appears to perhaps be missing a section between tabs. Hard to see with all the grease.
Just to the right of that, looks like a ring of some sort with a good chunk of it missing.
Also the cylindrical section to the left of the right caged bearing, someone had mentioned a chunk lower in the picture, but the same part high in the picture also looks chewed. Inside of that, the planet gears look not fully engaged, partly slid out axially.
Just to the right of that, looks like a ring of some sort with a good chunk of it missing.
Also the cylindrical section to the left of the right caged bearing, someone had mentioned a chunk lower in the picture, but the same part high in the picture also looks chewed. Inside of that, the planet gears look not fully engaged, partly slid out axially.
#14
Not having a clue how that hub is constructed, I'm gonna take a first stab at it and say that the (pic) left end wheel bearing disintegrated or the cone loosened, and that's what holds the whole assembly together axially, or simply a locknut on the axle that does the same and rotates with the whole assembly.
Wow, I'm seeing more and more damage, huge chunks taken out of carriers or plates.
Last edited by Duragrouch; 05-14-24 at 03:49 AM.
#15
Resident PIA
Join Date: Jul 2004
Location: City of Oaks, NC
Posts: 980
Bikes: Gunnar Roadie, Look 765 Optimum, Spesh Aethos
Liked 492 Times
in
262 Posts
It didn’t work as a rock crusher.
.
.
__________________
--
Shad
I knew where I was when I wrote this
I don't know where I am now...
05 Gunnar Roadie Chorus/Record
67'er
--
Shad
I knew where I was when I wrote this
I don't know where I am now...
05 Gunnar Roadie Chorus/Record
67'er
#16
Retaining ring that keeps the rods in their place has failed. Rods are protruding past their normal position (picture). This caused gear mis-alignment which led to further damage.
#17
Is the retaining ring a big wire ring, or a flat plate like a giant c-clip? Is it fixed or free to rotate with respect to the pins? I'm just wondering about why it failed, if under any stress, or just fixed with respect to the pins and there was fretting wear at each contact point?
#18
Clark W. Griswold
Join Date: Mar 2014
Location: ,location, location
Posts: 14,659
Bikes: Foundry Chilkoot Ti W/Ultegra Di2, Salsa Timberjack Ti, Cinelli Mash Work RandoCross Fun Time Machine, 1x9 XT Parts Hybrid, Co-Motion Cascadia, Specialized Langster, Phil Wood Apple VeloXS Frame (w/DA 7400), R+M Supercharger2 Rohloff, Habanero Ti 26
Liked 4,569 Times
in
3,060 Posts
Exactly what is the flaw in using an internally geared hub? Is it because you don't understand their utility or because they did something to you or what? Yes there are drawbacks to an IGH system just like there are drawbacks to using a derailleur and drawbacks to a fixed gear or single speed application. However in many cases the IGH can be quite superior if done right for a wide variety of riders. It won't be ideal for someone racing or who needs really quick gear changes but that is a small number of the cycling population. Also consider that Sturmey-Archer is still producing their hubs with not a ton of change for way longer than any derailleur has been around is pretty decent testament to their staying power. Granted yes S-A did get bought out by SunRace but I can still get a shifter that can work with an old 3 speed hub from the 50s is pretty neat. Now I am not saying I am a S-A fan just pointing out the longevity of their product compared to say a Dura-Ace derailleur which will change every 3-6 years or so and not always be backwards compatible.
Likes For veganbikes:
#19
Is the retaining ring a big wire ring, or a flat plate like a giant c-clip? Is it fixed or free to rotate with respect to the pins? I'm just wondering about why it failed, if under any stress, or just fixed with respect to the pins and there was fretting wear at each contact point?
https://www.sjscycles.co.uk/hub-spar...-1110/?geoc=SE
Came out of its groove. Could be error during assembly or material failure. These rings are not under load.
#20
Looks like this.
https://www.sjscycles.co.uk/hub-spar...-1110/?geoc=SE
Came out of its groove. Could be error during assembly or material failure. These rings are not under load.
https://www.sjscycles.co.uk/hub-spar...-1110/?geoc=SE
Came out of its groove. Could be error during assembly or material failure. These rings are not under load.
#22
#23
Senior Member
Join Date: Apr 2011
Location: Maryland, USA
Posts: 2,657
Bikes: Drysdale/Gitane/Zeus/Masi/Falcon/Palo Alto/Raleigh/Legnano
Liked 757 Times
in
463 Posts
So, the ancient Sumerian Wankel rotary engine, brought to earth by ancient aliens? That's all over the internet...
__________________
Larry:1958 Drysdale, 1961 Gitane Gran Sport, 1974 Zeus track, 1988 Masi Gran Corsa, 1974 Falcon, 1980 Palo Alto, 1973 Raleigh Gran Sport, 1974 Legnano. Susan: 1976 Windsor Profesional.
Larry:1958 Drysdale, 1961 Gitane Gran Sport, 1974 Zeus track, 1988 Masi Gran Corsa, 1974 Falcon, 1980 Palo Alto, 1973 Raleigh Gran Sport, 1974 Legnano. Susan: 1976 Windsor Profesional.
#24
Likes For Duragrouch: