Is this 4230 641 9400 the rod that passes through the Spur Gear unit. If so, what is exact diameter and length for this? Also does the cover come with a needle bearing attached?

4230 641 9400 is number 20 on the diagram, the dimensions are as follows; Length - 65.2mm; OD/ - 7.97mm; I/D - 5.50mm. 4230 640 5804 does come with the needle cage bearing (number 9 on the diagram). https://lsengineers.zendesk.com/attachments/token/UmSWLLNwpmyD4CSq3VMvvTBsO/?name=Capture.PNG