I'm not a mechanical engineer, but pretty sure. Those bearings receive a
substantial load, not only on both axes, (cornering) but off axis as
well. (momentary or short term impacts). The race is not only tilted,
but tapered so those rollers support load along their entire lengths.
Note, the race taper is roughly 20 degrees off horizontal as the
primary, long term is horizontal, while short term (but substantial)
loads are mainly, or close to, in line with the axles although impacts
may be at almost any angle off the rims.
73, Roger (K8RI)
On 7/15/2017 Saturday 12:20 PM, Jim Thomson wrote:
Date: Sat, 15 Jul 2017 01:56:37 -0400
From: "Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>
To: towertalk@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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73
Roger (K8RI)
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