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Step 13 Build three Idler Bearing Sub-Assemblies.
13a Slide two F625Z(H51) Flanged Bearings on a M5 x 30
Machine Screw as shown. NOTE: install the flanges of
the Bearings so that each flange is oriented to the
outside from the other as shown.
13b Thread a M5 Nut onto the Machine Screw snug
against the Bearings as shown.