[TowerTalk] Bearings for Axial Load

Jim Thomson jim.thom at telus.net
Sat Jul 15 12:20:52 EDT 2017

Date: Sat, 15 Jul 2017 01:56:37 -0400
From: "Roger (K8RI) on TT" <K8RI-on-TowerTalk at tm.net>
To: towertalk at contesting.com
Subject: Re: [TowerTalk] Bearings for Axial Load

<Roller and ball bearings work well for side loads. Ball bearings in a 
<horizontal race can support substantial loads. Roller ans ball bearings 
<typically work in one axis at a tine.  It takes a tapered bearing, like 
<a wheel bearing to do well on both axes.

<73, Roger (K8RI)

##  u sure about that ?  A tapered bearing, like a wheel bearing, is designed
to be mounted horizontal.   Mount it vertical, and all the load ends up on the bottoms
of those shafts that go through the  tapered bearings... on the now horz section, that all those 
vert shafts are connected to. .  Im sure it was on your site that 
depicted broken shafts..that go through the center of the tapered roller bearing.  IF the wheel bearing was
big enough to begin with, and 2 of them were used, it should not be an issue.  IF the rotor in question had 
the entire weight  of the mast + ants  on it, then there would be no  weight on the bearings either... only
an axial load, when the wind blows.... moot point.

##  I dont know what type of bearing the speer brand is..... thats used in the UST crank-ups, but they are
built like a tank...and come with locking collars.   I used 2 of em... + a K7NV  small PP. 

Jim  VE7RF. 

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