Horrible squealing noise from z-axis movement

[nortman]

I have had my Shark Pro HD for quite a few years now. Recently it started making a horrible noise with any movement from the z-axis. Up, down - it makes a squealing noise.

I cleaned and sprayed dry lube on the screws and stabilizer bars and it is still making the noise.

Are there bearings that could be going out?

- Andrew

[Bob]

What kind of dry lube are you using?
Teflon, by itself, tends to clog the drive screws.
Bob

[nortman]

I'm using Liquid Wrench Dry Lubricant. Is there a better brand I should be using? I'm all for suggestions

[Bob]

I use DuPont Teflon Silicone lubricant. It was recommended by Next Wave.
What you're using could be fine. I'm just unfamiliar with it.
In the past, I have overused Teflon spray. This built up a waxy residue that clogged the lead screws.
Bob

[nortman]

Any tips on cleaning the screws? My machine has seen some heavy use this week and I probably need to give it a good cleaning.