This URL will carry you to an IPTCI bearing in the model series NANF. These
bearings have 4 holes rather than two holes and have an eccentric locking
collar. The price quoted here in potato country is about $70. Someone else may
be able to comment on the significance of B-type or L3-type seals, 4-hole versus
a 2-hole bearing flanges and eccentric locking collars. The one I am looking at
is designated as NANF 210-32 2S.
To get the correct bearing use the URL and then change the shaft diameter to '2S
in' .
http://www.iptci.com/store/product/2/15917?s=2+in&e=B
I have no pecuniary interest in these bearing --- only know how to find the
store.
Tod, K0TO
> -----Original Message-----
> From: towertalk-bounces@contesting.com
> [mailto:towertalk-bounces@contesting.com] On Behalf Of Mike
> Sent: Thursday, August 13, 2009 6:27 PM
> To: towertalk reflector
> Subject: [TowerTalk] Battle of the bearings
>
> I like to get thoughts/experiences about Rohn TB3 bearings
> vs. Glenn Martin TB25.
> The antennae will be a 4 element SteppIR and an M2 6M7JHV on
> 20 feet of 2" chrom-moly.
>
> I plan to use 2 bearings. Can the bearings be mounted on a
> rotor shelf (25G tower)?
>
> 73, Mike NF4L
>
>
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