HF Spindle 500 bagel damaged

Hi Iab,

Silly question, but is the ER11 collet properly mounted in the nut - it should have "clicked" as you pressed it in. You have to get it oriented correctly before it is easy to press it home.

Not really sure which part you refer to as "bagel". Is it the thread on the spindle?.

There is some distortion in your pictures that make it difficult to confirm that the spindle itself is OK - I assume it all fitted together properly when you first got it.

Peter

When starting with CNC hobby I had also my problems with the coletts. Maybe those YOUTUBE videos will help:

https://www.youtube.com/watch?v=ilGmFnOrPh8

https://www.youtube.com/watch?v=ZvxX-kEVRxo

Good luck!

Hi Iab,

Silly question, but is the ER11 collet properly mounted in the nut - it should have "clicked" as you pressed it in. You have to get it oriented correctly before it is easy to press it home.

Yes, I hear that "click" everytime.

Not really sure which part you refer to as "bagel". Is it the thread on the spindle?.

Yes.

There is some distortion in your pictures that make it difficult to confirm that the spindle itself is OK - I assume it all fitted together properly when you first got it.

The thread in the spindle is not ok (my first photo) but it fitted together without problems the firts times I used the Stepcraft.

Also, thank you @DocBrown for the videos but they don't help me 🙁

Very disappointed right now: the Stepcraft is brand new and after a couple of works, it has to be stopped and I don't know what to do.

Is the thread stripped? It is difficult to discern from your photograph but it looks like that might have happened if you cross threaded the nut.

Is the thread stripped? It is difficult to discern from your photograph but it looks like that might have happened if you cross threaded the nut.

Yes, the damage is to small to be able to see it in a photo but there it is. When you try to insert the nut, at the beggining there is no problem but when you try to insert it more, the nut twists to one side. It is impossible to insert it upright.

Everything is ready and working but this small problem has stopped all the projects of my lab. Unbelievable 🙁

Do you have access to some very fine watchmakers needle files - you may be able to remove some of the damaged parts of the thread so as to get the nut past that point. Not sure about any damage to the thread in the nut - almost impossible to repair so you may have to sacrifice that one if it is badly damaged.

A trick that sometimes works is to hold the nut very firmly in a vice and screw in the mating thread keeping the threaded part at 90 degrees - if you trim the spindle thread first to remove the worst of the damage. This may get you going again.

It is a fairly brutal way to treat a precision thread, but it is damaged anyway!! 👿

Do you have access to some very fine watchmakers needle files - you may be able to remove some of the damaged parts of the thread so as to get the nut past that point. Not sure about any damage to the thread in the nut - almost impossible to repair so you may have to sacrifice that one if it is badly damaged.

A trick that sometimes works is to hold the nut very firmly in a vice and screw in the mating thread keeping the threaded part at 90 degrees - if you trim the spindle thread first to remove the worst of the damage. This may get you going again.

It is a fairly brutal way to treat a precision thread, but it is damaged anyway!! 👿

I've thought about this solution but, having in consideration that the spindle is still in warranty, maybe It's better solution to send it to Stepcraft. I rely more in his expertise than on mine :unsure: