The likely reason for no reply to your first question earlier in the week is one or both of these...
Nobody here knows anything about B&H projectors
You do not properly describe - other than saying the reel does not turn - the fault...
I have never owned or repaired a projector but have seen the mechanism on one or two. The take up reel can not be too fierce else (I guess) it runs the risk of pulling the film through too quickly so the drive to it needs to be quite gentle. There will be a friction arrangement - a wheel or a loose belt to drive the reel. Clearly your machine has lost this connection.
Your challenge is to examine the method of driving the reel and to determine yourself why it's not operating properly - nobody here can see inside your projector - only you.
This youtube video might help you...
https://www.youtube.com/watch?v=lDPwlO2hJ-M
You might search using a web browser for
Film Projector Repairs.
My guess is that a rubber component (belt or washer) has rotted.
Not all questions on here get answered...
Good Luck...
May 2017