Topic: Lubricating grease - Sugestions?

Hey there.


I've done a few CLA jobs. Some worked out better than others.

One thing I've noticed, is that some of the lenses on wich I've cleaned and relubed the zoom mechanism, it became slack(ish), almost as if there was no lubricant there, the feel was not smooth.

I've used the same light Lithium grease I use for focus helicoids. Is that the problem? it does become king of runny when set in the small spaces of zoom mechanisms (it doesn't drip out like oil, but it looks like it might do so)...


Is there a way of thickening it (heating it to release some of the lighter portions, maybe)? Or is it a matter of just getting the right grease? Any sugestions?



Thanks a lot. Cheers!


P.S.: Had this originaly posted in the cameras section, sorry roll.

Pentax: K20D; CZJ Flek 20/4; Ensinor 24/2,8 Macro; SMC Pentax: A 28/2,8; 50/1,7; M 50/1,4; Tak. 50/1,4; Tamron Adall 2: SP 90/2,5 Macro; SP 60-300/5,4; 35-70/3,5 CF; .
Nikon: D90; F2; F4; FA. RMC Tokina 17/3,5; Nikkor: S.C. 50/1,4; AI-s 28/2,8; Micro 55/2,8; 80-200/4; S. E: 35/2,5; 100/2,8; Viv. S. 1 100/2,5 Macro (Kiron); MC Rokkor PG 58/1,2; Canon FD 300/4. And some others...

Re: Lubricating grease - Sugestions?

Hi,

I have never had issues with white lithium grease, although i have always used it only for the focus helicoids ...
Frankly, i cannot imagine how some lubricant could work for the focus ring and not for the zoom ring ...

If you have the choice, try to get some molybdenum disulphide grease, it seems that it is the best one for lenses (anyone more experienced than me here ?) ...

Sorry, cannot be of more help ...

Cheers

Pentax K10D & Canon 5D Mk II & Meyer, Nikon, Schacht, Steinheil, Tamron, Zuiko lenses &:
Takumar:24/3.5, 28/3.5, 35/2, 35/3.5, 50/1.4, 55/1.8, 85/1.8, 105/2.8, 120/2.8, 135/3.5, 150/4, 200/4
Pentax:M28/2.8, K28/3.5, M50/1.4, A50/1.7, K85/1.8, K105/2.8, K135/2.5, M200/4
CZJ:Flektogon 20/2.8 & 20/4 & 35/2.4 & 35/2.8, Pancolar 50/1.8, Biotar 58/2, Sonnar 135/3.5 & 180/2.8

Re: Lubricating grease - Sugestions?

Well, in the original post I forgot to mention a detail: I seem to recall having read somewhere about some "damping" grease (not sure if that was the term used). From what I understood, the idea was not only to lubricate and give a a smooth action, but also to add some drag, a smooth kind of drag tongue.

I can say that I have experienced (and have in my collection) all kinds of focusing actions, from very light, so much so that it is sometimes dificult to stop at the right spot (Nikkor 50 1,8) to very heavy, hard to even turn the focus ring (Porst 135 1,8 and to a lesser extent, my Rokkor 58 1,2), but none of those are in need of a relube, the action is smooth, it's just that it's also heavy smile.

Does anyone know what I'm talking about? And would this be of any use to dampen the zoom mechanism?

That's my real question.


By the way, Indianadinos, I too have never had any trouble with Lithium grease on focus helicoids, only in the zoom mechanics wink.



Cheers!

Pentax: K20D; CZJ Flek 20/4; Ensinor 24/2,8 Macro; SMC Pentax: A 28/2,8; 50/1,7; M 50/1,4; Tak. 50/1,4; Tamron Adall 2: SP 90/2,5 Macro; SP 60-300/5,4; 35-70/3,5 CF; .
Nikon: D90; F2; F4; FA. RMC Tokina 17/3,5; Nikkor: S.C. 50/1,4; AI-s 28/2,8; Micro 55/2,8; 80-200/4; S. E: 35/2,5; 100/2,8; Viv. S. 1 100/2,5 Macro (Kiron); MC Rokkor PG 58/1,2; Canon FD 300/4. And some others...

Re: Lubricating grease - Sugestions?

Silicone-based lubricants have nice dampening action. I use grease from an auto shop, rated from -40 to about +200C. No color (it's transparent), no smell, and chemically neutral (I have similar grease that's rated as food grade, although that one is a bit thicker and only suitable for very short helicoids such as those of wide-angle lenses). Silicone grease is my favorite at the moment. Providing you can find a tube of this of the right viscosity for a reasonable price, it's just about perfect for all kinds of lenses.

Re: Lubricating grease - Sugestions?

I read silicone lubricants become dry after relatively short time and than you practically can't remove it. But this is only information from the net, maybe somebody more knowlegeable can tell us more about the existence (or not) of this problem. I could get silicone lube more easily here, I am looking for lithium one for more than a year now.

Re: Lubricating grease - Sugestions?

I've bought various "damping" greases from www.micro-tools.com. There are different grades of it, depending on your application / lens.
I will say that they all seem expensive for what you get, but I'm very satisfied with my repairs, and so far the grease seems to be holding up well.
It also works good for waterproofing the threads of mag-lites, etc, and for the gears / pulleys on stereo knobs.

-Nicolas Haroney II