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Total 9 documents matching your query.

1. [TowerTalk] TB3 Postmortem (score: 1): Author: K9MA <k9ma@sdellington.us>; Date: Sat, 4 May 2019 20:38:59 -0500; After nearly 30 years of holding up my TH7 and D40, the thrust bearing was pretty rough. The T2X never had any trouble turning it, but I took it apart to see what was going on. I found the surfaces o; /archives//html/Towertalk/2019-05/msg00009.html (7,384 bytes)
2. Re: [TowerTalk] TB3 Postmortem (score: 1): Author: mike repinski via TowerTalk <towertalk@contesting.com>; Date: Sun, 5 May 2019 11:46:22 +0000 (UTC); Then the rotator gets the little marks. Can't win. --Original Message-- From: K9MA <k9ma@sdellington.us> To: towertalk <towertalk@contesting.com> Sent: Sat, May 4, 2019 9:39 pm Subject: [TowerTalk] T; /archives//html/Towertalk/2019-05/msg00011.html (8,401 bytes)
3. Re: [TowerTalk] TB3 Postmortem (score: 1): Author: Grant Saviers <grants2@pacbell.net>; Date: Sun, 5 May 2019 06:53:46 -0700; "Thrust" bearing or rotator, the problem is the same. Steel bearing balls on aluminum are a bad combination for causing fretting corrosion and wear. When there are small motions, the oil film is pene; /archives//html/Towertalk/2019-05/msg00012.html (9,334 bytes)
4. Re: [TowerTalk] TB3 Postmortem (score: 1): Author: K9MA <k9ma@sdellington.us>; Date: Sun, 5 May 2019 10:05:51 -0500; True, but the rotator distributes the load among a much larger number of ball bearings. The shape of the races in the TB3 make it clear it was designed primarily for radial loads, not axial. Also, a; /archives//html/Towertalk/2019-05/msg00013.html (9,099 bytes)
5. Re: [TowerTalk] TB3 Postmortem (score: 1): Author: "Bob Shohet, KQ2M" <kq2m@kq2m.com>; Date: Sun, 5 May 2019 12:50:54 -0400; Hi Scott, Your post brings up some important points. First, when using any thrust bearing (TB), it is important to realize that the TB may not be machined perfectly so that the angle of the holes for; /archives//html/Towertalk/2019-05/msg00014.html (13,127 bytes)
6. Re: [TowerTalk] TB3 Postmortem (score: 1): Author: k7lxc--- via TowerTalk <towertalk@contesting.com>; Date: Sun, 5 May 2019 17:32:03 +0000 (UTC); Ok, please disregard any advice about lubing the Rohn thrust bearing. This TB should not be lubricated as any grease in the races will accumulate dirt and grit and accelerate its wear and demise; /archives//html/Towertalk/2019-05/msg00015.html (9,153 bytes)
7. Re: [TowerTalk] TB3 Postmortem (score: 1): Author: Grant Saviers <grants2@pacbell.net>; Date: Sun, 5 May 2019 20:38:55 -0700; A great list of why a bored plastic plate as a sleeve radial bearing is better than the so called "thrust" bearings. Note that US Tower crank-ups use a piece of galvanized tubing as a radial bearing; /archives//html/Towertalk/2019-05/msg00029.html (13,456 bytes)
8. Re: [TowerTalk] TB3 Postmortem (score: 1): Author: K9MA <k9ma@sdellington.us>; Date: Mon, 6 May 2019 10:37:52 -0500; The TB3 did last for almost 30 years. 73, Scott K9MA Grant KZ1W Your post brings up some important points. First, when using any thrust bearing (TB), it is important to realize that the TB may not be; /archives//html/Towertalk/2019-05/msg00031.html (15,035 bytes)
9. Re: [TowerTalk] TB3 Postmortem (score: 1): Author: "Mike & Becca Krzystyniak" <k9mk@flash.net>; Date: Mon, 6 May 2019 21:53:22 -0500; Indeed my US Tower has a long tube at the top for the radial bearing, but it also has a machined bearing sitting on top of the tube for holding the mast. I'm not sure if it is a ball bearing or a rol; /archives//html/Towertalk/2019-05/msg00037.html (15,206 bytes)

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