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Good vacuum lubricant - MoS2. The lubricant is a mix of MoS2 black powder and acetone. Bearings look very dirty but works. There are also a lot of expensive special lubricants, but we used to use this

Hi! One more thing. Before I put the new planetray system into my chamber, I had have an another where was no bearings and no lubrication. And the adhesion was bad too. So I am not sure the adhesion

Yeah the pump will need to be run in, not too sure how long it will take though. I seem to remember Gomez mentioning a numbered period some time ago, but can't recall how long it was, maybe he can

Hi ! Well, actually I even don't think if there is as an oil backstreaming,because my DP has a water cooled cold cap and water cooled cold trap too, but I had to put some lubricant into my chamber.

@Thomas The pump is new. Is a break-in period required before the best vacuum is reached. Right now, I only have about 2 hrs running time on it. Bruce

Hi Attila, 230 A/s - in my opinion it is too much..... Anyway I suppose that bad local adhesion is because of a bad cleaning. If there would be oil backstreaming, oil vapor must cover a whole surface

HI Drew, Glad to hear you're making progress! Better get that leak sorted, have you thought about a drop of shellac to fill/seal it? Was the done thing back in the day to find and seal tiny leaks all

Have you baked the fittings sensor etc. while pumping down? Might get you a bit further down, but if it's holding vacuum then it's not going to be the magic bullet. Oh yeah is the pump brand new or

I got one more thing to add. I have a dual diff pump with Dow 704 oil in it and a really really really tiny leak in the left pump. This puts a tiny flow of air into the left pump that results in a

Hi Vladimir! Well thank you for the advises! Yesterday I increased the evaporation rate up to 230 Anstr?m/sec(23nm/sec) The adhesion is much better, but still not passing the tape test.Parts of the

Thanks Gomez -- FYI, I bought a Viot 2-stage rotary vacuum pump (2.75 lpm) for some plasma experiments. To check out the pump's ultimate performance, I mounted a TIF9450D Digital Micron Gauge directly

From my limited experience and a lot of reading, those ultimate pressures apply to a brand new pump fresh from the factory, with brand new oil of the best available sort, dead-headed with a sensor at

The specifications for several two-stage, rotary vacuum pumps list an "ultimate vacuum rating" of around 15-20 microns Hg. Has anyone come close to these vacuum pressures with one of these commercial

Hi Attila, 1. Very low evaporation rate. For Al it should be at least tens A/s. I evaporate Al on a cold substrate at 40 A/s. 2. 4x10-5 torr is not very good for Al. Actually than vacuum is better,

5 angstrom per second is 0.5 nanometers per second. That is 10 times to low a rate of deposition. I thought the deposition rate was supposed to be 5 to 20 nanometers per second to ensure sufficient

I guess I need to end this offer. No one has sent a reply, I figured someone would be at $200 a bottle. If there is any interest, please let me know. Thanks Mike trouba@...

Hi All, I ran into a trouble during my evaporation session. My aluminium coating doesn't pass the tape test for adhesion. My cleaning methode is: -First I clean the mirror with isopropanol - Next I

Greetings, I was given this site by one of your fine members. I have for sale 3 one pound (poind) bottles of this oil. It was part of a lost freight sale. I will sell 1, 2 or 3 jars to the highest

Very nice work! Can't wait to see the pump-down results.

I have been following your work there with great interest. Looking forward to seeing how well the diffusion pump works.