[TowerTalk] Need for a LM470 sheave(pulley)

[K8RI on TT]

On 5/30/2011 1:27 AM, Eugene Jensen wrote:
> Locate a bearing company that normal sell to the machineshop trade's and the
> counter person can normally come up with a match or something close to it.
> Run a google on bearing company's and start dialing. 73 Gene K2QWD
>
> -----Original Message-----
> From: towertalk-bounces at contesting.com
> [mailto:towertalk-bounces at contesting.com] On Behalf Of K6QD
> Sent: Tuesday, May 24, 2011 1:58 PM
> To: towertalk at contesting.com
> Subject: [TowerTalk] Need for a LM470 sheave(pulley)

Press the bearing out and mike the ID, OD, and thickness.  The OD will 
be the same size as the OD of the sheave for in interference/press fit. 
The ID needs to be a slip fit over the shaft which may require polishing 
to get the new bearing to fit.

The first step might be to take the bearing to an automotive supply 
house or parts store and see if they have any thing that will match it.  
That *might* be the easiest and lest expensive approach.

73

Roger (K8RI)

> I need to replace a sheave (bad roller bearing) in an LM470.  It is an older
> Tri-Ex and the sheave is an ATCO M4-6B (no reference to ATCO on the
> Internet).  It's the one at the top of the first section that the pull-down
> cable runs over.  The bearing is a SKF KR6 (no longer mfg'd by SKF and no
> x-ref).  It appears that the bearing is simply pressed into the sheave and
> would be replaceable by itself.  So, I'm looking for sources for either the
> entire sheave ass'y w/ bearing (preferred) or just the bearing.  The sheave
> is 3.5" O.D., 0.5" width, 3/8" pin bore and accommodates 1/4" (or 3/16")
> wire rope.
> Karl Tashjian is looking into it.  His replacement sheaves are expensive.
> Tks!!   Mike K6QD
>
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>