Date: Fri, 9 Dec 2016 11:55:51 -0500
From: "john@kk9a.com" <john@kk9a.com>
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Which Thrust Bearing to Use
I have much less mast inside the tower but I concur that there is no
reason to have three bearings on the mast (two thrust plus the rotator).
John KK9A
## I have always used 2 thrust bearings... + the rotor. But I made sure the
middle thrust bearing was adjustable..so I could do a precise alignment. These
days,
In actual usage, the 3 x set screws are backed off, or removed. So zero
binding, but if the
wind gets up, the middle bearing will take some of the load.
## IF the rotor has to come out, then a temp M2 mast clamp...used on their
OR-2800 rotor,
sits on top of each bearing, so the mast doesnt budge. The 2 x bearings take
all the weight.
Mast stays put, dead vertical.
## 6 ft of mast inside the tower. Bottom bearing is 2 foot above the rotor.
PP hangs below
the rotor plate.
## With 6 ft into the tower and 14 ft above the tower, that is a helluva lot of
weight above
the top of the tower. Even with the UST double top plate and collar assy, I
still would not trust
it. So in went bearing number 2.
Jim VE7RF
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|