Chain Cheka

15/10/2024

23/09/2017

Cheka is designed for all 5/8 sealed chains i.e 520, 525, 530, 50(530) & 532. Its unique geometry back edge to back edge compensates for all roller diameters, widths and clearances.

22/09/2017

As you can see manufacturers agree. Sealed chains last very well to a certain point (1%), then wear accelerates.
Also note non sealed chains have a very poor life, but their service life is quoted as 2.5% due to different construction they are less likely to break at this elongation but at this point the sprockets will be ruined due to synchronisation issues.

22/09/2017

The only true way to measure chain wear is under tension. Nobody would go to this trouble. This is exactly why Cheka was developed.

22/09/2017

As you know O ring sealed chains have an excellent life compared to the original non sealed type.
But there is still an optimum time to replace ring sealed chains.
Manufacturers specify service life of sealed chain at 1% elongation.
This is when uniform wear stops and then begins to accelerate.
In turn it is soon followed by power loss, premature sprocket/transmission wear, uneven torque, rough gear shifts and last but not least chain breakage.

22/09/2017

Cheka enables quick and accurate chain wear checks.