How do you avoid binding? Can you let the bearings float and self align
before tightening the housing down or is their a better method.
Mark N1UK G3ZZM
----- Original Message -----
From: "jeremy-ca" <km1h@jeremy.mv.com>
To: <K7LXC@aol.com>; <towertalk@contesting.com>; <john@kk9a.com>
Sent: Saturday, 25 August, 2007 1:00 PM
Subject: Re: [TowerTalk] Rohn 45 Question
> Thats strange. Numerous YCCC and other serious contesters/DXers with big
> stacked arrays have been using dual bearings for decades with a
> significant
> reduction in rotator failures.
>
> Setting up a dual bearing installation is quite simple if you pay
> attention
> to what you are doing, even when using a Tailtwister. Other rotators are
> much easier. My current setup on 3 towers uses Orion, Create and
> Tailtwister
> rotators. Binding just doesnt happen.
>
> Carl
> KM1H
>
>
>
> ----- Original Message -----
> From: <K7LXC@aol.com>
> To: <towertalk@contesting.com>; <john@kk9a.com>
> Sent: Saturday, August 25, 2007 12:09 PM
> Subject: Re: [TowerTalk] Rohn 45 Question
>
>
>>
>> In a message dated 8/25/2007 9:02:02 A.M. Pacific Daylight Time,
>> towertalk-request@contesting.com writes:
>>
>>> Personally I see no reason for a second bearing and I see a huge
>>> headache
>> trying to line up a top bearing, middle bearing and a rotator on
>> something
>> built as unprecise as the Rohn mounting plates. Your rotator already
>> has
>> thrust bearings and it should easily accommodate the side forces at the
>> bottom of the mast if it's properly sized.
>>
>> I totally agree. The reason for an intermediate plate/bearing is to
>> hold
>> the mast in case of a rotor swap. That's it. The accessory shelf already
>> has
>> a hole in the middle that'll do just that so the additional TB is
>> unnecessarily redundant and a waste of money.
>>
>> Tower parts are not precision items. You take a chance on additional
>> bind when trying to line up the rotator and 2 TBs. It's sometimes
>> challenging
>> enough just to get the bind out with one TB.
>>
>> Cheers,
>> Steve K7LXC
>> TOWER TECH
>>
>>
>>
>>
>>
>>
>>
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