Question Ball Screw replacement for wearing thread nuts

I have installed SKF Ball Screws in my Stepcraft 2-420, and I am not sure what lubricant I should use?





My best regards
/Mika+

Anleitungen sagen Öl auf die spindeln, aber ich bin sehr sher skeptisch.
Du solls ein öl mit sehr sehr stärke Klebeeigenschaften finden.

Ich benuzte OKS 402 Lithium-Fett:

Schmierung von Gleit-, Wälz- und Gelenklagern, Keilwellen,
Steckachsen, Gewindespindeln und Gleitflächen aller Art
bei normalen Belastungen und allen für die Fettschmierung
üblichen Gleitgeschwindigkeiten

https://www.stepcraft-systems.com/en/forum/betrieb/5758-reinigung#55463

What do you think about PTFE Grease?
PTFE Grease.

I will order on of OKS 402 and try it.
Can I use OKS 402 to the rollers as well?

My best regards
/Mika+

mikath wrote: What do you think about PTFE Grease?
PTFE Grease.

I love Teflon, but I never tried it on the Steppie. The main problem are the adhesive properties of the grease. The product shown at the link you posted says nothing about that.
Here below there is another PTFE-grease, they claims "excellent adhesion", it will be true? There is no datasheet to make a comparison... mmmmh...
https://www.motipdupli.com/en/INT/products/motip/professional/technical-sprays/ipg-1301/tm-1301.html

mikath wrote: I will order on of OKS 402 and try it.
Can I use OKS 402 to the rollers as well?

Absolutely.
Viscosity of the OKS 402 (110 mm2/s) is somehow in the middle between an oil and the Microlube GL 261, so you can use it for nuts/spindle and the rollers as well.

Density 0,93 g/cm3 (DIN51757)
Viscosity NLGI 2
This is on the grease in my link.
Data sheet PTFE Grease.

My Best Regards
/Mika+

I made same SKF ball screw (SH 10 x 3 R) holders.
Firstly I tried to thread the workpiece by hand, but the result was not acceptable.
The best result came with 4th axis and thread mill.

Now i can do these holders for others too:)

I think that POM-C plastic should work also, but I still used 6082 T6 Aluminium.

Uploaded some videos to WiseParker facebook site:
www.facebook.com/WiseParkerEE/videos/484377495768269/

Thanks to everyone who shared pictures and ideas.

Hi I had a question I also have a Stepcraft D840 version 2 and have quite a lot of backlash on my Y axis and tried the new anti backlash nuts from stepcraft but this one fit very badly and I sent them back. Now I read this message and am very curious if this works well. Do you have the correct dimensions of the Y lead screws and maybe a link where you bought the new bullet screws. I am very much looking for a better solution.

Hi all,
I'm also interested in the modification. If quite some backlash on my Y and Z axis.
I don't have the gear to cut these alu holders myself. I can image that more users are interested. Maybe someone who's better equipped can help another SC user out?

Hi!

I just got some original FGR 10x3 RH ballscrew nuts if someone is interested. I have 10 brand new FGR ballscrew nuts available. I will send from Estonia.

Best wishes!
Martin

Tulnukas wrote: Hi!

I just got some original FGR 10x3 RH ballscrew nuts if someone is interested. I have 10 brand new FGR ballscrew nuts available. I will send from Estonia.

Best wishes!
Martin

Hello, do you have 4x to sell to me please? Which price? Can we talk via WhatsApp 00351934139078 or via email This email address is being protected from spambots. You need JavaScript enabled to view it.?

Hello,

I would like to rebuild my stepcraft D600 (with performance kit) also with ball screws. I was wondering if you have model / drawing for the holders? The models I could find have slightly different dimensions than the original brass nuts from stepcraft. see also att ached screen shot. Before manufacturing I would like to be sure that it is exactly correct. I am also willing to pay you to make them for me. Please let me know. Thanks!

Hi all,

I have purchased the SKF bal bearings and replaced the X and Z axis. The Y axis are still not changed because for now that runs OK (performance kit)
I have arranged 4 holders so I could replace them later. Everything is re assembled and after greasing this evening (I had to purchase some grease) I hope to adjust and made some test runs. Finally after 2 years I found some time too work on it.