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06-14-2011, 05:26 PM   #1
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Grease for focussing threads

Please can someone recommend grease for lubing up a focussing thread. I'm going to take a prime (cheap one) apart and have a go.

EDIT: looks like Nikon grease is available on ebay


Last edited by whojammyflip; 06-14-2011 at 05:34 PM.
06-14-2011, 05:41 PM   #2
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I use automotive bearing grease. If it can sustain high pressure, high temperature in bearings, it can handle lenses.
06-14-2011, 11:41 PM   #3
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Should do, just don't apply too much. Clean off the old grease with kitchen detergent then brush on a very thin layer on one side will do. If you see it squeezing out, it's too much.
06-15-2011, 12:23 AM   #4
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I spray the helicoids down with brake cleaner to remove everything that was on them, it leaves them completely clean with no residue.

For grease, I use white lithium grease, I get it in a spray can from CRC. I spray some on a cloth and wipe it on the helicoids, just enough to give it a light coating.

First one I did was a cheap Suntar 135mm, it would barely turn and it was impossible to use. I also did my Mamiya-Sekor 60mm macro after I was confident that I would not ruin it. That was roughly a year ago and they both still focus very smoothly and I have not had any problem with the grease creeping. I recently did my Jupiter-9, it had some really nasty grease from the factory.

06-15-2011, 06:25 AM   #5
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Articles - Maintenance section

https://www.pentaxforums.com/forums/maintenance-repair-articles/139172-lubric...ml#post1452966
06-16-2011, 01:37 AM   #6
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Thanks, think I will opt for some Nikon FC-4, which is designed for Nikon manual focus helicoids.
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