King Midas mill conversion

[Robin Hewitt]

The ballnut is already pre loaded for zero backlash and has been tested on the screw.

That looks interesting, is it shimmed or does it have springs? The data sheet is vague.

[Gary]

No its a spacer between the two nuts.
I dont know of any commercial double ballnuts that use a spring.
All the manufactures i have worked with use a spacer to pre load the double ballnut, and there are reasons for this.

That looks interesting, is it shimmed or does it have springs? The data sheet is vague.

[Robin Hewitt]

All the manufactures i have worked with use a spacer to pre load the double ballnut, and there are reasons for this.

Good point, I forgot to mention that John will need to leave room to fit an oil pipe to the nut. I use 4mm OD nylon tube and standard push fittings which are a bit sticky out and it will drip