Need help with missing bolt

[MagnusVM]

Hello,
I’m cleaning up a new to me lever Fp1. As I’m putting it back together I have an issue.

Please forgive my lack of parts identification, but on the underside of knee (?) is a threaded hole that lines up with one of the shafts inside. It can be seen in the photo to the right of the x screw and driveshaft. It doesn’t seem as though it is an oil plug, but I don’t know. The machine didn’t have anything in this hole since I’ve had it.

My question… Is there a specific length, profile, or function of the bolt for this hole? And if so would anyone explain or possibly provide a photo?

Thanks,
Magnus

 

[MagnusVM]

Sorry, correction.

Z axis screw not x.

 

[AlfaGTA]

Not a great photo but i believe what you are seeing is the end of a shaft that carries the gears that power and reverse the elevating screw....
That shaft is a light press fit into the casting and the threaded hole you see in its center is there to provide you with a method of extracting that blind shaft if need be for repairs .
Cheers Ross

 

[MagnusVM]

Thank You Ross!