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Total 20 documents matching your query.

1. [TowerTalk] Re: Thrust bearing (score: 1): Author: leewical@lava.net (LEE ROGER WICAL); Date: Sat, 14 Mar 1998 19:16:40 -0500; H-E-L-P: Does anyone have an address, FAX, phone number for FAFNIR thrust bearings? I seem to have misplaced my data file. Lee -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions:; /archives//html/Towertalk/1998-03/msg00271.html (6,796 bytes)
2. [TowerTalk] Re: Thrust bearing (score: 1): Author: john.brewer@us.schneider-electric.com; Date: Mon, 19 Jul 2004 15:06:09 -0400; Excellent point. Then there's the practical issue of how to align a thrust bearing with the rotor, so as to not cause MORE binding than doing without would create... John K5MO ______________________; /archives//html/Towertalk/2004-07/msg00610.html (7,600 bytes)
3. Re: [TowerTalk] Re: Thrust bearing (score: 1): Author: "Chuck Lewis" <clewis@knology.net>; Date: Thu, 22 Jul 2004 11:29:34 -0500; About thrust bearing alignment... I also belong to the "let the rotor bear the axial load up to its rated limit" camp. Therefore, since the weight of my array plus mast falls within the rotor spec, m; /archives//html/Towertalk/2004-07/msg00623.html (9,232 bytes)
4. RE: [TowerTalk] Re: Thrust bearing (score: 1): Author: "Noel" <yaesurig@msn.com>; Date: Thu, 22 Jul 2004 11:49:40 -0600; Agreed with everthing except the statement. "...Then make sure the collar can rotate around the mast without binding".. Seems to defeat the point of having a thrust bearing? Why not have just a colla; /archives//html/Towertalk/2004-07/msg00633.html (8,194 bytes)
5. RE: [TowerTalk] Re: Thrust bearing (score: 1): Author: Joe <WD0M@centurytel.net>; Date: Thu, 22 Jul 2004 12:05:16 -0600; I'm in the keep it tight category - why have a thrust bearing if it doesn't secure the mast? I'd be concerned about scoring the mast and weakening it over time if there is a small gap. Cheers, Joe WD; /archives//html/Towertalk/2004-07/msg00634.html (8,883 bytes)
6. Re: [TowerTalk] Re: Thrust bearing (score: 1): Author: "Gene Smar" <ersmar@comcast.net>; Date: Thu, 22 Jul 2004 14:20:10 -0400; TT: I installed an industrial bearing atop my tower. I use it to steady the mast at the top as well as to provide some support for the vertical antenna load. I accomplish the vertical support NOT by; /archives//html/Towertalk/2004-07/msg00636.html (10,677 bytes)
7. RE: [TowerTalk] Re: Thrust bearing (score: 1): Author: kb9cry@comcast.net; Date: Thu, 22 Jul 2004 18:46:44 +0000; I have TB-3 on my towers and what I do is set the mast down into and resting on the rotator. I center the mast in the thrust bearing and tighten the collar screws, really just to keep it centered. I; /archives//html/Towertalk/2004-07/msg00638.html (9,839 bytes)
8. Re: [TowerTalk] Re: Thrust bearing (score: 1): Author: "Chuck Lewis" <clewis@knology.net>; Date: Thu, 22 Jul 2004 14:46:34 -0500; N4NM comments inserted in Noel's text: Lots of us have used pointy-tops with no bearing for years...much the same as a collar. The thrust bearing (overkill for many of us) just provides a way to elim; /archives//html/Towertalk/2004-07/msg00639.html (9,613 bytes)
9. Re: [TowerTalk] Re: Thrust bearing (score: 1): Author: "Jerry Keller" <k3bz@arrl.net>; Date: Thu, 22 Jul 2004 15:48:48 -0400; I use two thrust bearings, one at the top and one a couple of feet down the mast. The rotator is a couple of feet below the bottom TB. The top TB is merely a guide; the bottom TB supports all (or nea; /archives//html/Towertalk/2004-07/msg00640.html (11,732 bytes)
10. Re: [TowerTalk] Re: Thrust bearing (score: 1): Author: "Jerry Keller" <k3bz@arrl.net>; Date: Thu, 22 Jul 2004 16:18:48 -0400; Sorry, in my previous post I should have mentioned: My top "thrust bearing" is actually what N4NM calls a "pointy-top"... a tube attached to the top tower section thru which the mast passes... which; /archives//html/Towertalk/2004-07/msg00644.html (12,806 bytes)
11. Re: [TowerTalk] Re: Thrust bearing (score: 1): Author: K4FJ@aol.com; Date: Thu, 22 Jul 2004 16:21:37 EDT; I use two thrust bearings, one at the top and one a couple of feet down the mast. The rotator is a couple of feet below the bottom TB. The top TB is merely a guide; the bottom TB supports all (or nea; /archives//html/Towertalk/2004-07/msg00645.html (9,565 bytes)
12. Re: [TowerTalk] Re: Thrust bearing (score: 1): Author: "Chuck Lewis" <clewis@knology.net>; Date: Thu, 22 Jul 2004 15:26:33 -0500; -- Original Message -- I figure the less weight that bears on the rotator, the longer it will last.... and TB's are cheaper than rotators! N4NM comment: I have always been taught that ball and roller; /archives//html/Towertalk/2004-07/msg00646.html (9,700 bytes)
13. Re: [TowerTalk] Re: Thrust bearing (score: 1): Author: "Jerry Keller" <k3bz@arrl.net>; Date: Thu, 22 Jul 2004 16:46:33 -0400; -- Original Message -- I figure the less weight that bears on the rotator, the longer it will last.... and TB's are cheaper than rotators! N4NM comment: I have always been taught that ball and roller; /archives//html/Towertalk/2004-07/msg00648.html (10,071 bytes)
14. Re: [TowerTalk] Re: Thrust bearing (score: 1): Author: "Jerry Keller" <k3bz@arrl.net>; Date: Thu, 22 Jul 2004 16:54:03 -0400; Chuck, N4NM raises the question whether taking all the vertical weight load off the rotator will have some adverse effect on it, due to failure to "preload" the bearings, etc. I dunno. But even thoug; /archives//html/Towertalk/2004-07/msg00650.html (10,859 bytes)
15. Re: [TowerTalk] Re: Thrust bearing (score: 1): Author: "Jerry Keller" <k3bz@arrl.net>; Date: Thu, 22 Jul 2004 16:54:56 -0400; Chuck, I'm no engineer (I just play at being one) but it seems obvious that, like any other part of the system, a TB needs to be rated for the loads placed on it, both vertical and horizontal loads I; /archives//html/Towertalk/2004-07/msg00651.html (10,536 bytes)
16. RE: [TowerTalk] Re: Thrust bearing (score: 1): Author: "Keith Dutson" <kjdutson@earthlink.net>; Date: Thu, 22 Jul 2004 16:06:25 -0500; I have not seen any specs posted about the Rohn TB-3 or TB-4. I use the TB-3 (for 2 inch mast) and these "set screws" are actually bolts. I recall they are 9/16 or larger. The bearing appears to have; /archives//html/Towertalk/2004-07/msg00652.html (12,054 bytes)
17. Re: [TowerTalk] Re: Thrust bearing (score: 1): Author: "M. Kent Miller" <K4MK@triad.rr.com>; Date: Thu, 22 Jul 2004 17:10:12 -0400; I guess it depends on the individual rotor manufacturer and their theories ....... I quote from the instruction manual for the Create Model RC5A-3 " A bearing or similar item is usually installed at; /archives//html/Towertalk/2004-07/msg00655.html (12,538 bytes)
18. Re: [TowerTalk] Re: Thrust bearing (score: 1): Author: "Tower (K8RI)" <tower@rogerhalstead.com>; Date: Thu, 22 Jul 2004 17:38:18 -0400; Likewise, I use two thrust bearings and unlike others here, I use the thrust bearings to support all the weight of the antenna system which is substantial. Probably on the order of 600#, give or take; /archives//html/Towertalk/2004-07/msg00658.html (9,417 bytes)
19. Re: [TowerTalk] Re: Thrust bearing (score: 1): Author: "Jerry Keller" <k3bz@arrl.net>; Date: Thu, 22 Jul 2004 20:05:44 -0400; The point about mast expansion is very interesting, but am I correct in thinking that it wouldn't produce any problem if the weight of the mast and antennas is borne by the clamps bearing on the thru; /archives//html/Towertalk/2004-07/msg00667.html (10,849 bytes)
20. Re: [TowerTalk] Re: Thrust bearing (score: 1): Author: "Tower (K8RI)" <tower@rogerhalstead.com>; Date: Fri, 23 Jul 2004 12:19:36 -0400; If I understand correctly Jerry, you are just supporting the mast with the top of the thrust bearing, leaving the mast free to slide up and down in the bearing. It is serving as a guide to take the s; /archives//html/Towertalk/2004-07/msg00678.html (15,830 bytes)

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