Z Leadscrew Nut came with threaded mounting holes

I’m assembling the core and while installing the leadscrew nut I noticed the instructions make it clear to leave some wiggle room. However, the nut I purchased seemed to come with threaded attachment holes, so it’s solidly attached to the core no matter how much I back off the M3 screws. The one in the documentation appears to have non-threaded holes, which makes sense if you want to be able to move it.

Am I going to need to drill out these holes to make some wiggle room, or should I finish assembly of the Z motor first to see if it’s going to bind or not?

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Oh weird. I haven’t seen that before.

Since it is all currently accessible, I would just do it now. Is you have the right sized drill bit, the brass should be easy to drill.

But it will probably be alright. It is hard to tell what fraction of leadscrew nuts don’t align, because only the ones that didn’t asked about it in the forums. That makes me think maybe most were all right.

On mine, those are 3mm non threaded holes. I’d surmise that 1/8" drill wouldn’t cause a problem. The rotational constraint will still be good enough.

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Just a quick update that I tested this as-is once I got the Z-axis assembled (without drilling out the threaded holes), and it appeared to work smoothly throughout its range, so unless it binds with the spindle mounted I’m not gonna mess with it. Still waiting on the rest of my electronics to come in but I’m seriously impressed with how rigid this machine feels.

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