Section roller problem

[Thrashsmith]

Hi all, does anyone have any clues what may be causing this scary banging? I haven't used my roller in a little while & fire it up today but soon turned it off!
Thanks for any suggestions. The chain seems ok

 

[brightspark]

well the chain looks to be jumping the cog . id disconect it and turn the final drive cog on chain by hand to see if anything is binding and locking it up

 

[angellonewolf]

chain streched ? or some thing jaming it up ?

 

[Hitch]

I'd say one roller/shaft is binding up a bit. Looks like the whole thing could do with a little oil/grease.

Can you get the chain off without much fuss and spin them by hand, or take covers off to expose bearings/bushings...

Does it do the same if you reverse it?

 

[zzr1200]

A worn out sprocket probably or damaged tooth/teeth would be my guess, drop the chain off and inspect asap before any more damage is done.

Pull the driven gear off to inspect fully.

 

[Thrashsmith]

I'd say one roller/shaft is binding up a bit. Looks like the whole thing could do with a little oil/grease.

Can you get the chain off without much fuss and spin them by hand, or take covers off to expose bearings/bushings...

Does it do the same if you reverse it?

Yeah, does it when reversing too. Thanks

 

[Hitch]

Thought it might...checked if it's fairly free running yet?
Got a chain tensioner on it? Is that jammed... chain well lubed and free moving between links? Getting too much slack by the looks of it.
Pulling one way fine, but the extra slack is creating the slap it appears... Can't quite make it out from the video.

 

[Brad93]

Measure the length of 10 links of chain with a pair of calipers, compare to what it should be.

 

[brightspark]

or take it off lay it on a table and bend it sideways if it bends in to a fair ark its stretched but i dont think its that. it jumped the cog without any loading on it and the teeth would be arched if worn .somethings binding after the chain

 

[500e]

Blow YT to full screen Scroll through to 17/.026 then step forward teeth are shot by the look of it, do it to 19/.026 in smallest steps, the damaged teeth are just coming off the chain and you can see the whip
It happens every second the .026 time is the one to watch,reckon more damage somewhere + chain stretch