Check ebay for out of production bearings and suppliers of same. I
found some for a LM354 that way. Very unusual bearing/sheave assembly
marked "Boeing", so Tri-Ex must have bought a bunch of Boeing surplus at
some time as it definitely is a aircraft control cable sheave. Pricey
NOS bearings at $35 each but cheaper than making a new sheave. Both ID
and OD of the bearing are unobtainium in a current production bearing.
Grant KZ1W
On 6/20/2014 11:25 AM, Dan Hearn wrote:
Rick: I replaced the lift cables and pulley bearings on my TX472 by myself
with the tower in vertical position. I have a note on our club website
www.SDXA.org describing how I did it. The note is under the heading
Articals. The real problem was finding bearings. I checked with 2 different
bearing outfits here and they found that the bearings are no longer
available. The problem is that available bearings with the proper OD have
an ID that is too large. Fortunately one of the guys suggested slipping a
short piece of bronze sleeve bearing into the available ball bearing to
fill the space between its ID and the mounting bolt.
It was not difficult to press out the old bearings and press in the new
ones.
73, Dan N5AR
On Fri, Jun 20, 2014 at 10:58 AM, Rick Stealey <rstealey@hotmail.com> wrote:
I've been working since I posted. I found a pulley that is very sluggish.
It cleaned up with WD40 and motor oil and is at least turning, in my hand.
Now to locate proper industrial replacements at a reasonable price. At
least there is a strong possibility that this was the problem. I need this
tower to extend easily cause I want to put some educated aluminum up there !
Rick K2XT
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|