NBD925 wrote:Hey everyone I just got back to my computer today. Glad to see all this progress on this subject.
Hey DCON, there was no o-ring in the setup I took apart.
Here are the numbers on the bearing as they appear around the rim:
* CROYDON * K - 910
Here are the measurements that I came up with for the original bearing mentioned above:
19mm outer 10mm Inner 16mm Width . . . . the inner portion that rides in the needle bearing area is 17mm width and has gnarls on it to grip the arms that hold the wheel in the tensioner (
See Picture two and three . . . second item from the left on the bottom of the picture).
Tensioner Axle Measurements:
10mm Diameter 18mm Length there is a smaller diameter on the axle that is about 9.5mm and 8mm long in the center of the axle also one 3mm hole in the middle of that. This hole
does not go all the way through the axle. One end of the axle has a head on it that is 16mm dia and 1.5 thick for half of the dia and 4mm thick the other half. On the other side of the axle there were two tabs that hold the wheel in the tensioner arms. They were 5mm wide but I am not sure of the length dimensions of those tabs. A guess would be 5mm. We might be able to find a better way to mount the wheel on this end.
Tensioner wheel measurements:
19mm Inner 39mm outer (
possibly 40mm) 15.5mm wide The center ridge that the chain rides on is about 4mm wide 44mm dia This is a guess because mine is bad. The metal bushing that is molded to the rubber wheel is 16.5mm wide so 1mm wider than the wheel. This metal ridge is 23mm dia and 19mm dia inner.
Here are someone else’s measurements that might fill in the gaps or show what I'm talking about just ignore the Cam chain Guide roller in the left of the picture:
Cam Rollers by
adam.corts, on Flickr
Here are the pictures I took. They show the measurements I described above:
DSCN0268 by
adam.corts, on Flickr
DSCN0269 by
adam.corts, on Flickr
Let me know what else you guys need. That would be amazing if we as a group could find a solution to this and figure out the best material or replacement wheel for this tensioner.
DCON if you have access to a CNC, I’m sure if we could figure out the best material and measurements that someone could write a program for the CNC machine to get it done.
