[TowerTalk] Re: TowerTalk Digest, Vol 12, Issue 9

[ersmar at comcast.net]

Robin:

     Thanks for the info.  The McMaster P/N I would need (9961K44) would cost me about $13, whereas the muffler clamps actually cost about $4 for a set.  However, I'm sure the industrial version would be more durable and safer.  

73 de
Gene Smar  AD3F
> Shaft collars work very well as well; search www.mcmaster.com or 
> www.grainger.com .
> 
> 
> At 08:05 AM 12/2/2003, you wrote:
> >Barry:
> >
> >      Before you loosen the rotator u-bolts, consider adding a clamp above 
> > the top bearing.  I wouldn't rely on the two set secrews in the TB-3 to 
> > support the vertical load of the mast and antennas while you're fiddling 
> > with the rotator.  You can also add the angle and two u-bolts as Don 
> > suggests to keep the antennas and mast from rotating.
> >
> >On my tower I have mast clamps that I made out of two face-to-face muffler 
> >clamps.  Insted of the u-bolt that came with each, I used two long 
> >carriage bolts (all-thread will work also) to hold them together around 
> >the mast.  One set of clamps I have setting on top of the top bearing; I 
> >don't rely on the bearing's set-screws for weight support.  I have a 
> >second set on the mast about an inch above the middle shelf.  When I have 
> >to remove the rotator, I'll lower this second clamp onto the shelf and 

> >tighten it.  This way I'll have two fairly heavy clamps that support the 
> >vertical load of the mast and antennas while the bottom support (rotator) 
> >is missing.
> >
> >You'll probably have to cut or grind a bit off the facing ends of the 
> >clamps' saddles so they can fit around the mast without hitting each 
> >other. Also, consider getting clamps one size smaller than the OD of your 
> >mast. For my two inch mast I bought inch and seven-eighths clamps.
> >
> >GL es be safe de
> >Gene Smar  AD3F
> 
> Thanks,
> Robin 
> 
> _______________________________________________
> 
> See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless Weather 
> Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions 
> and ask for Sherman, W2FLA.
> 
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk