Mill ball screw lock nut

[400bird]

I'm slowly working on getting my new to me lathe up and running. It's an 80's import CNC knee mill. One thing I need to do is pull the X motor housing to have a buddy help machine the plate to mount the servo. As seen with the cover removed (also before I installed the head)


Anyways, I've got it all disassembled and only afterwards realized I have no idea how they installed (or how I reinstall) the lock for the outer bearing nut.

I realize it might be hard to see. But the bearings is pushed up against a shoulder on the ball screw, then the tabbed lock washer, with the nut on the outer or top of the stack. The lock tab is pulled forward from the rear.




Any help would be appreciated, thanks everyone.

 

[stupoty]

The nut looks like it "should" move quite easily , I was adjusting a similar not in an awkward location using a piece of aluminium round stock and tapping the end with a hammer to turn it.

Was a little slow but avoids the damage dun by using a punch to do the same.

Make sure your tab is bent out from the lock slot first .

Stu

 

[400bird]

Thanks for responding.

It got it all apart, the question was how to put it back together.

 

[stupoty]

Thanks for responding.

It got it all apart, the question was how to put it back together.

I used the same technique to make the nut tight again then used a flat head screw driver to bend the tab back down.

When the mills back working you could make a custom socket to do it

Stu

 

[400bird]

I used the same technique to make the nut tight again then used a flat head screw driver to bend the tab back down.

There's no access to get a screwdriver behind it.

When the mills back working you could make a custom socket to do it

Ouch, hits close to home, hahaha

 

[stupoty]

There's no access to get a screwdriver behind it.

Ouch, hits close to home, hahaha

the tabs on mine I had could just push down on it and it bent in, mine is harder to undo than do up to be fair.

I had considered heating an old screwdriver and bending it to make a custom tab bending tool.

Stu.

 

[400bird]

Yeah, those tabs are pretty soft. I'll just have to try to hook something from behind and pull it forward.