[amsat-bb] Re: Fw: KR500 bearings

[i8cvs]

Hi Bob, W7LRD

I am very happy that your problem has been almost solved !

73" de 

i8CVS Domenico
  ----- Original Message ----- 
  From: Bob- W7LRD 
  To: i8cvs 
  Sent: Friday, September 24, 2010 8:31 AM
  Subject: Re: [amsat-bb] Fw: KR500 bearings


  Hello Domenico

  Almost done.  I am having a problem, when I bolt everything together.  When the rotation gets to the end or stop position.  If I do not stop it in time it will remain jammed at the stop.  It can loosen if I hit the case or loosen the bolts holding the two halves together.  I am thinking the stop bolt  could be a bit longer, but it worked before and very little has been changed, except for cleaning and lubrication.  Thanks for your help.

  73 Bob W7LRD


  ----- Original Message -----
  From: "i8cvs" <domenico.i8cvs at tin.it>
  To: "AMSAT-BB" <amsat-bb at amsat.org>
  Sent: Thursday, September 23, 2010 7:43:20 AM
  Subject: [amsat-bb]  Fw:   KR500 bearings

  Hi Bob W7LRD

  My previous message to you via w7lrd at comcast.net was rejected to me !

  73" de

  i8CVS Domenico


  ----- Original Message ----- 
  From: i8cvs 
  To: Bob- W7LRD 
  Sent: Thursday, September 23, 2010 4:36 PM
  Subject: Re: [amsat-bb] KR500 bearings


    ----- Original Message ----- 
    From: Bob- W7LRD 
    To: i8cvs 
    Sent: Thursday, September 23, 2010 1:13 AM
    Subject: Re: [amsat-bb] KR500 bearings


    Hi Domenico-I am putting everything back together.  A couple of questions.  Do you find some grease may ooze out when it gets warm?



    Hi Bob W7LRD



    You should apply any type of black grease normally used over the outside gears of crains machine wich widstand high temperature without to melt.    



     As the retainer ring which has a little lip seems to hold the grease inside. 



    It is correct but if you use 2 or 3 more balls then the retainer is non anymore necessary. 



    Also I loosened the little gear wheel that drives the pot, in order to work the gear train.



    You must buy a new one gear wheel !



    It is a little trickey to get to, is that pot only 180 degrees or can it go further? 



    No........... the original pot can rotate for more than 360 degrees 



    I will have to tighten the gear back to the pot shaft when I can get the pot in the right location.  I don't want to accidently run to rotor and keep going at the end of the pot.



    The original 500 ohm pot can rotate all around for more than 360 degrees and the center pot wiper of the new model of rotators has a flexible wire outside the case of the pot to provide a safe contact inside of it !



    73 Bob W7LRD



    Best 73" de 



    i8CVS Domenico 

    ----- Original Message -----
    From: "i8cvs" <domenico.i8cvs at tin.it>
    To: "Bob- W7LRD" <w7lrd at comcast.net>, "AMSAT-BB" <amsat-bb at amsat.org>
    Sent: Tuesday, September 21, 2010 8:26:11 AM
    Subject: Re: [amsat-bb]  KR500 bearings

    ----- Original Message -----
    From: "Bob- W7LRD" <w7lrd at comcast.net>
    To: <amsat-bb at amsat.org>
    Sent: Tuesday, September 21, 2010 1:54 AM
    Subject: [amsat-bb] KR500 bearings
    >
    >
    > Hi-I am looking for a supplier of bearings and the support for them for
    the KR500 el rotor. I called Vertex and they're not sure if the bearings are
    the same as the current 5400/5500 series. The Kenpro product line is no
    longer in production.
    >
    > 73 Bob W7LRD
    >
    > Seattle

    Hi Bob, W7LRD

    The diameter of each ball for the bearing of a KR500 is 0.312" or 5 / 16
    inch
    or 7.9375 mm. I suggest you to remove both stainless steel bearing holders
    throw it away and add 2 or 3 more balls in each bearing in order to replace
    the room of the holders teeth. I did it but I do not remember exactly if I
    added 2 or 3 more balls. Fill the bearing wrinkles of the rotor housing with
    black dense molibdene grease and pull the balls in it.It works very well for
    me from many years now.

    73" de

    i8CVS Domenico




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