[TowerTalk] Contents of TowerTalk Digest, Vol 120, Issue 22 - TB3 hole pattern

[Roger]

On 12/20/2012 12:26 PM, Marvin Shelton wrote:
>
> On Dec 20, 2012, at 9:00 AM, towertalk-request at contesting.com wrote:
>
>
> Jerry,
> I'm no expert but since it's critical that the thrust bearing and rotor be 'plumb' to each other I would think you'd want to match drill the actual thrust bearing to the tower instead of using a hole pattern. Unless you created that hole pattern from the actual thrust bearing itself that you plan on using.
> At least that's what I'd do.
>

You can create the holes a bit oversize and let the bearing, "self 
center".  It's often no where as simple as it sounds, but the bearing 
can be used as a rough pattern.  it is 4 holes, equally spaced uv abokt 
circle,  If the accessory plate can be removed, or you can create a 
split ring of the proper size to mark, or create the bolt circle it 
should work.

73

Roger  (K8RI)


> 73, Marv WA2BFW/7
>
>>
>>    1. Rohn TB3 Hole Pattern (Jerry Gardner)
>>
>> From: Jerry Gardner <jerryw6uv at gmail.com>
>> Subject: [TowerTalk] Rohn TB3 Hole Pattern
>> Date: December 20, 2012 8:11:44 AM PST
>> To: TowerTalk at contesting.com
>>
>>
>> Anyone have a drawing of the hole pattern needed for the Rohn TB3 thrust
>> bearing they could send me (or point me to)? You'd think this would be on
>> the Rohn web site, but darned if I can find it.
>>
>> 73, Jerry
>>
>>
>>
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