[TowerTalk] Which Thrust Bearing to Use

[Chris]

Another nice thing about using a plastic bearing is the block can be cut in half and installed/removed/maintained without taking the mast out of the tower, or out of the rotator!

Chris
KF7P

On Dec 9, 2016, at 9:19 AM, charlie at thegallos.com wrote:

> <snip>
>> 
>> Torlon is a bit pricey... $1200 for a 12x12 sheet 1/2" thick
>> 
>> Moly filled Nylon is $37 for a 1" thick piece 6x6"  - Says it can be
>> used outdoors, It's black, but that doesn't always mean it's UV resistant.
>> 
>> Black acetal (Delrin) is $26 for the same 1"x6"x6"
> <snip>
> 
> Which is why I said we don't need torlon of vespil <g>
> 
> Usually, if you are using those, you get them injection molded to shape,
> unless it is a high buck one off, as they material is really priced per
> oz, so as you would be removing the whole middle.  If you were in mold it,
> there is much less there - but that is talking production, making molds
> etc, unless you can find one of the plastics houses that offers a hat
> bearing say in 2.25" ID
> 
> Done right, as the hat shaped bearing is UNDER metal, and never exposed to
> UV, it'll never be an issue.  You can also use the Delrin, or even filled
> delrin
> 
> Like I said, one of those applications where the fact we are using ball
> bearings is just old fashioned, and today not even close to best practice.
> 
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