For the older model Singer or Reliable 20U style ZZ sewing machines, our synchronizer will not fit. Reliable Replacement Clutch Wheel shown on this page is to Install Reliable 6000SM/SYCH Needle Positioner Synchronizer on these Older Model Singer 20U Type Machines which have Disengageable Clutch Wheels.
At the present time we have in stock 3 units only, an adapter that we made specifically to fit the synchronizer for these older model machines. Our newer model 2200SZ ZZ sewing machine does not have the clutch wheel, so there are no issues to mount the synchronizer.