TSDZ2 Sprag clutch

[Nick2]

Hi!

I have my TS about 2,5 months now and only about 360 km on the clock.
It is running fine, but I noticed about 1mm play on the chainring already, and also some play on the crank.
So it seems like it is time for new sprag clutch order...

I can order new "Big Gear" from PswPower, but it will most probably be the same s..tty quality as the original.
As far as I was able to find on this forum and other sources, I can purchase CSK30P or BB30-1k-k (that one is supposed to be better?).
There is one more option here: https://www.hendersonbearings.co.uk/csk30p-one-way-bearings-premium-quality-kyk-with-keyway-30x62x16mm.html (with "HQCSK30P printed on the box, I guess that means "High Quality CSK30P"?) - That seems like a good product but delivery terms are not practical for me.

Now my question is (plase bear with me, it is not my area of expertise): are those generic names for this type of bearing, so it may be manufactured by any manufacturer, or brand names that belong to specific manufacturers? I am trying to find something from a reputable manufacturer, that will hold a bit longer than just 360 km...
An opinion from someone with more expertise and/or personal experience with those bearings would be most appreciated

 

[Hillhater]

Nick,
Im no expert on these sprag clutches, but as a fellow TSDZ2 user , i probably will need to brush up a bit !
However, so far i do know that the CSK30P is a generic descriptor for this type of clutch /bearing ( 62mm OD, 30 mm ID, 17mm wide,..with “P” denoting a keyway on the inner bore.
So yes, many different bearing manufacturers produce items with this descriptor, and as always , there are good ones, bad ones, cheap ones, and many inbetween,
All i can suggest is you source one from a reputable bearing supplier , relying on their expertise, but obviously manufacturers such as NSK, Timken, etc are the ones to look for
NOTE.. there is also a CSK30P +2 available from some manufacturers that is 4mm wider (21mm instead of 17mm) and claims to have 60% higher torque rating.....but i have no idea if it will fit as a direct replacement .
Some info and data here ..
https://www.ach.nu/wp-content/uploads/2017/07/stieber_type_csk-csk2rs-en.pdf

 

[Nick2]

I checked local suppliers today, and almost fainted
Prices are from 35€ for some Chinese brand, to almost 200€ for Stiber brand...

 

[casainho]

I think you can try the parts specific to avoid that play (spring washers), see the manual document for fix that, on PSWPower store.

 

[sysrq]

It has been said in one German forum that this is a very brave engineering from a company like Tongsheng, since normally there should be a bearing next to the sprag clutch to reduce the play.

 

[PeteCress]

With a failed clutch, can the bike still be pedaled - albeit without electric assist?