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  1. #21
    Join Date
    Nov 2017
    Location
    Bangor, Co Down
    Posts
    33

    Default Re: Replacing ST50 masthead anemometer bearings -how to

    Does anyone here know the size of the bearings that are needed? I have to do a job on my ST50 unit, and would like to have the bearings there when I take the unit down.
    Great thread!

  2. #22
    Join Date
    Dec 2012
    Location
    Gone cruising
    Posts
    2,367

    Default Re: Replacing ST50 masthead anemometer bearings -how to

    Quote Originally Posted by fearmhuir View Post
    Does anyone here know the size of the bearings that are needed?
    S693ZZ bearings (stainless 3x8x4mm shielded)

  3. #23
    Join Date
    Nov 2017
    Location
    Bangor, Co Down
    Posts
    33

    Default Re: Replacing ST50 masthead anemometer bearings -how to

    Thabks yngmar - most appreciated!

  4. #24
    Join Date
    Aug 2005
    Location
    Durham & Port Grimaud
    Posts
    138

    Default Re: Replacing ST50 masthead anemometer bearings -how to

    Sorry to resurrect an old thread, but just used the excellent advice on renewing the bearing. However it recommends renewing the O rings but there is no spec on their sizes. Does anyone know the sizes? One of mine is broken
    Ta in advance,
    Mike
    -----------------------------------------------
    Current X-332 Gone Etap26i

  5. #25
    Join Date
    Jun 2008
    Location
    Brixham
    Posts
    931

    Default Re: Replacing ST50 masthead anemometer bearings -how to

    If voting changed anything, they wouldn't let you do it.

  6. #26
    Join Date
    Aug 2005
    Location
    Durham & Port Grimaud
    Posts
    138

    Default Re: Replacing ST50 masthead anemometer bearings -how to

    Thanks
    -----------------------------------------------
    Current X-332 Gone Etap26i

  7. #27
    Join Date
    Jul 2001
    Location
    Lorient, just back from a second round Atlantic trip
    Posts
    3,545

    Default Re: Replacing ST50 masthead anemometer bearings -how to

    do they indicate the oring thickness/inside and outside diameter? I do not have access to ebay.uk..

    thanks

  8. #28
    Join Date
    Aug 2005
    Location
    Durham & Port Grimaud
    Posts
    138

    Default Re: Replacing ST50 masthead anemometer bearings -how to

    Roberto,
    Only diameter as 1.87mm. I guessed ID is probably 18.77mm. As they are very cheap I have ordered 20.35mm as well. Note these are imperial sizes. Also link is for EPDM rubber. If you intend to lubricate with grease use Niton/Viton rubber instead. Same ebay supplier offers both types of rubber.
    Mike
    -----------------------------------------------
    Current X-332 Gone Etap26i

  9. #29
    Join Date
    Aug 2005
    Location
    Durham & Port Grimaud
    Posts
    138

    Default Re: Replacing ST50 masthead anemometer bearings -how to

    -----------------------------------------------
    Current X-332 Gone Etap26i

  10. #30
    Join Date
    Jul 2001
    Location
    Lorient, just back from a second round Atlantic trip
    Posts
    3,545

    Default Re: Replacing ST50 masthead anemometer bearings -how to

    Thank you very much Mike!

    regards, r.

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