Loose Nikon lens

Discussion in 'Nikon' started by Onepercentf, Sep 12, 2003.

  1. Onepercentf

    Onepercentf Guest

    Does anyone know what grease I can use to firm up the focussing on manual focus
    Nikon lenses - mine are very loose, as if the original grease has dried up. It
    seems an easy enough job, I've unscrewed the mounting plate, and can see where
    to apply a little grease - but what sort of grease? Many thanks for any advice.
    regards, David
     
    Onepercentf, Sep 12, 2003
    #1
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  2. Onepercentf

    Bhup Guest

    use a high melting point grease. similar to ones used for car bearings!
     
    Bhup, Sep 12, 2003
    #2
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  3. Onepercentf

    Chris Quayle Guest

    I tend not to use an oil based grease, as it's usually too viscous and
    the more volatile components tend to leach out quickly and can get into
    the aperture blades. Also, the viscosity isn't stable over temperature
    so the focus ring will feel sloppy in summer and tight in winter.

    On Nikon lenses, I believe the original white or pink grease used were
    both silicon based. I tend to use a medium viscosity moly loaded silicon
    grease for such repairs and applied _very_ sparingly, but IME, you can't
    do the job properly without a stripdown to clean all the dirt and old
    grease out of the threads.

    Have a look on the Dow Corning web site. They have a large range of
    silicon lubricants, some of which are usefull for camera work as they
    maintain their viscosity over a wide temperature range and don't leach
    out...

    Chris
     
    Chris Quayle, Sep 12, 2003
    #3
  4. Onepercentf

    Paul W. Ross Guest

    I have had excellent results with the "plumber's grease" that is a
    clear, high-temperature silicon grease for this sort of thing. Comes
    in a little plastic box for a dollar or so at any good hardware store.
    Stays put, which is important, and seems to last for years.
     
    Paul W. Ross, Sep 12, 2003
    #4
  5. Onepercentf

    Duncan Ross Guest

    From: (Paul W. Ross)
    ...and every time you screw a filter on the end it say "cor blimey, who put this
    in...".
     
    Duncan Ross, Sep 12, 2003
    #5
  6. Onepercentf

    Onepercentf Guest

    .and every time you screw a filter on the end it say "cor blimey, who put
    I appreciate all your replies, but especially this one! Many thanks
     
    Onepercentf, Sep 12, 2003
    #6
  7. Onepercentf

    RWatson767 Guest

    Davis et al
    I've unscrewed the mounting plate, and can see where to apply a little grease
    - but what sort of grease?

    I am going this route with several Nikon lenses this month and next. There is
    no substitute for a complete teardown of the helicals, clean out everything and
    relube. White Lithium Grease works well. Then reassemble. If is not tight
    enough there is a special grease available for this that will "fill in the
    gaps" so as to speak. This will involve a disassemble and reassemble of the
    helical(s) again but a good repairman will catch it before it is too late. I
    am sure that MicroTools has the proper grease.
    Bob AZ
     
    RWatson767, Sep 13, 2003
    #7
  8. The vacuum crew where I used to work used a grease that wouldn't leach out
    even under high vacuum conditions......It might be a good lubricant to use
    in a lens......
     
    William Graham, Sep 13, 2003
    #8
  9. Onepercentf

    Chris Quayle Guest

    Right - I think you'll find that that is Silicon based as well, since
    the volatile components of hydrocarbon based grease get sucked into the
    vacuum system as contaminants. It's been a long time, but one of the
    engineering labs I used to work in with loads of Edwards hi vac
    equipment used a special grease for just this reason...

    A lot of this technology is not new. For example, Dow Corning MS4 was
    _the_ standard grease for electrical apps over 20 years ago and I don't
    suppose much has changed in the intervening years...

    Chris
     
    Chris Quayle, Sep 13, 2003
    #9
  10. Yeah....The trouble with this high vacuum grease was that it was very stiff
    and heavy.....I don't see how it could lubricate much in a delicate
    mechanism like a lens....Sometimes the best lubricant is just a good
    cleaning and no lubricant at all......Although a touch of grease on the
    bayonet mount doesn't seem to hurt.
     
    William Graham, Sep 14, 2003
    #10
  11. Onepercentf

    Chris Quayle Guest

    I'd second that. A very (so you can hardly see it) light coating of moly
    based grease on the facing side and on the internal cam faces of Nikkor
    lenses makes em feel as smooth as sik as you mount the lens. Probably
    helps the wear issue as well...

    Regular maintenance keeps kit working as it should :)...

    Chris
     
    Chris Quayle, Sep 14, 2003
    #11
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