30-08-13, 06:22 PM
Today my manual adjuster arrived. What a quality item it is. Very well made and finished. Fitted quite easily but there is an intermediate stage where it could be too tight or its in the right place. It can never be as accurate as the automatic one IMHO.
Anyway fitted and looks good.
Which brings me to the standard one. If you take it apart there is a very delicate spring in it which I can see could break quite easily. But, and here is the but.. This spring rotates clockwise and forward the plunger on a strong worm thread to take up any chain slack. It not the spring that takes any strain,its the worm thread. If the spring were to break it would certainly not be able to move forward to take up any more slack for sure,or be able to spin the plunger back. What I cannot see is how the plunger can jump back violently when it has to turn on the worm thread. Over time as its not under spring tension if it breaks I guess it could vibrate back slowly on the thread and make the chain rattle but this would not be catastrophic failure.
Anyway, manual here.
Anyway fitted and looks good.
Which brings me to the standard one. If you take it apart there is a very delicate spring in it which I can see could break quite easily. But, and here is the but.. This spring rotates clockwise and forward the plunger on a strong worm thread to take up any chain slack. It not the spring that takes any strain,its the worm thread. If the spring were to break it would certainly not be able to move forward to take up any more slack for sure,or be able to spin the plunger back. What I cannot see is how the plunger can jump back violently when it has to turn on the worm thread. Over time as its not under spring tension if it breaks I guess it could vibrate back slowly on the thread and make the chain rattle but this would not be catastrophic failure.
Anyway, manual here.