[TowerTalk] HAM IV rotor / mast slipping / Slipp-Nott

[dotravel at aol.com]

Yes for sure. Even a small drilled divot or a little flat area filed on the mast for the screw to land on will give more resistance to twisting.

John NA6L      


-----Original Message-----
From: john <john at kk9a.com>
To: TOWERTALK <TOWERTALK at contesting.com>
Sent: Sat, Apr 7, 2012 7:32 am
Subject: Re: [TowerTalk] HAM IV rotor / mast slipping / Slipp-Nott


If you drilled into the mast this method would even work better.


To:towertalk at contesting.com
Subject:Re: [TowerTalk] HAM IV rotor / mast slipping / Slipp-Nott
From:dotravel at aol.com
Date:Fri, 6 Apr 2012 23:27:51 -0400 (EDT)


One simple (and easy/cheap) thing to try:

Drill and tap the clamp plate for 4 additional   3/8"  pinch bolts/screws 
and
use the hardened  type with the concave tips. Space the bolts in two rows
located 1/3 of the way in from the from each side edge and about 1/3 of the 
way
down from the top edge and 1/3 of the way above the bottom edge. If the 
clamp
plate is too thin for enough threads add a surface welded nut to the outsied 
of
the plate.

Unless you mast is super hard material, having 5 pinch screws should go a 
long
way to keeping the mast from rotating.

John NA6L 

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