Towertalk
[Top] [All Lists]

[TowerTalk] Rotating Tower: Replacing the Base Bearing

To: "tower and HF Antenna Construction Topics." <towertalk@contesting.com>, towertalk@groups.io
Subject: [TowerTalk] Rotating Tower: Replacing the Base Bearing
From: Richard Thorne <rthorne@rthorne.net>
Date: Fri, 24 Oct 2025 15:19:43 -0500
List-post: <mailto:towertalk@contesting.com>
I have a Rotating Tower System (RTS) rotating 55g tower.

The prop pitch seized up. I'm trying to determine if the prop pitch gave up the ghost or something on the tower seized which caused the prop pitch to fail.

I took the drive chain off and I was able to turn the tower by using a pipe stuck in between the tower legs for leverage. It did turn but it took some good force to turn it. I'm not sure if this is normal or if I should be able to turn it by hand. There is a good amount of weight on the main bearing; 13 sections of 55g, several JK yagi's and the downward force due to the guy system.

If I have to replace the base bearing, are the jack bolts ( 3 of them in-line with the tower legs) strong to keep the tower in place so the bearing could be removed and replaced? The jack bolts are 3/4" diameter all thread.

Thanks

Rich - N5ZC







_______________________________________________



_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk

<Prev in Thread] Current Thread [Next in Thread>
  • [TowerTalk] Rotating Tower: Replacing the Base Bearing, Richard Thorne <=