rear sprocket centering tool

we got this muti tool lathe/milling device at work

as a project in how to use it we knocked out a rear sprocket centering tool from a piece of 1.5" HDPE plastic that was lying around

OD 1.45" center hole .375" (Fits bike axle and rear sprocket supplied with kit)

inserted in hole over axle- as i tightened on the sprocket, continuously checked the fit of the centering tool

seems to have worked great...


This piece does not prevent the sprocket from moving, it is just a measuring device. I repeatedly remove it during the process and if it binds i know the sprocket has moved out of concentricity...
 

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    centering tool.JPG
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