[Top] [All Lists]

Re: [TowerTalk] thrust bearing lubrication

Subject: Re: [TowerTalk] thrust bearing lubrication
From: N6FD <>
Date: Tue, 18 May 2010 17:42:43 -0700
List-post: <">>
On 5/18/2010 8:39 AM, wrote:
> Unlubricated bearings? Maybe the reason you are wearing out the races. I
> use Moly grease on all of mine, no problems yet. Every bearing needs
> lubrication, even old windmills from 100 years ago have oilers, and windmills 
>  only
> turn at about 75 rpm. Where I live dust and dirt above 50 feet is not a
> problem, maybe in West Texas or Arizona the big dust storms could deposit
> enough  to make a difference.
Yep! Here in the desert, flying grit and sand is a real problem.  Check 
out these pictures of the local weather:

>   The grease would not make a  negative difference in  the grit problem.
> Once grit gets into the races the damage is done,  grease or no grease. No way
> to get the grit back out either way. Actually the  grease would help keep
> the grit out. Once a bearing is put through several  rotations, excess grease
> is forced out through the races. There is no way to get  this grease back
> into the bearings.  There is no grease pump to move grease  back onto the
> bearing surfaces.This is why you repack wheel bearings. The excess  grease can
> act as a semi-seal for the races.
> Also the only way to get grit into this bearing is for it to blow in an
> upward direction through the small crack between the two halves. Grease in the
>   bearing would prevent airflow through the bearing. No airflow, no grit.
> Marty ab5gu


TowerTalk mailing list

<Prev in Thread] Current Thread [Next in Thread>