On 09/20/2010 11:54 PM, Bob- W7LRD wrote:

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 _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb

If you have a bearing ball in good condition, measure it and see if Small Parts has replacements in the correct size. http://www.smallparts.com/s/ref=sp_search?searchNodeID=16310161&keywords...

Jim KQ6EA

----- Original Message ----- From: "Bob- W7LRD" w7lrd@comcast.net To: amsat-bb@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