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Step 6 Slide the 626-2RS Bearing(ZD3) onto the shaft of the ACME
Rod, next, insert 2 Shim Washers and secure in place with the
6mm Split Locking Collar by holding the Locking Collar tightly
against the Bearing, then tighten the Set Screw as shown.
Step 7 Insert the ACME Rod through the hole in the Rail Top Support
and thread into the ACME Nut as shown.