Unbranded Timing Belt Pulley 2.725" dia. x 8-1/4" Wide 20 Teeth might be good for a industrial art decor project. the bore measures between .635 and .640 on my bore gauge was probably 5/8" at one time 

 

Not sure what exactly this was for it has a small bore compared to its width for timing pulley there are 20 teeth
 This pulley is from the Woolrich mill in Woolrich PA. it closed a few years ago.
 
 
 
This is surplus to a now closed factory that kept spare parts on the shelf. The mill still had some of the old parts for some of their old equipment.
 
 
[Please Look at all the pictures they are part of the description]  

 

                                                                                                         
                                                                                            [B1-F1-R4-S1-4]