[TowerTalk] Source for Large Adjustment Nut
john at kk9a.com
john at kk9a.com
Wed Apr 4 12:36:52 EDT 2018
It has been many decades since I cut threads on a lathe but yes that would
better than paying $667. I imagine that a CNC lathe house could easily make
this if you cannot find a reasonably priced source.. I have had to machine
gears for my older TIC rotators so manufacturing parts for obsolete
products is probably not unusual.
Sent via the Samsung Galaxy 7 edge, an AT&T 4G LTE smartphone.
On Wed, Apr 4, 2018 at 12:26 PM, Grant Saviers <grants2 at pacbell.net> wrote:
> $667 plus ship and tax. Whoopee!
> Actually a GO thread gage costs $254 which shows the Fastenal price is
> ridiculous! https://www.threadcheck.com/3-1-2-12-un-2b-go-trilock-plug-g
> age/ So I can buy the gage, use $20 of 1/2" flat plate (or whatever
> thickness you want), spend 2 hours and make $400. So a machine shop is
> probably your source. Rather than buy the gage, an aluminum male plug
> would be easy to make and check the internal diameter while threading in a
> Give Portland Bolt a call, they may have them or know where to get them.
> Or check local rigging supply outfits.
> I asked Tacoma Screw and they have coarse 3 1/2, no fine.
> Grant KZ1W
> On 4/3/2018 15:19 PM, john at kk9a.com wrote:
>> https://www.fastenal.com/products/details/0169318 ?
>> John KK9A
>> Patrick Barkey N9RV
>>> Tuesday, April 03, 2018 4:11 PM
>>> I have a chain drive for my big rotating tower that was built by K8RR
>>> (SK). It has a torque limiter that allows the tower to slip in high winds
>>> to protect the rotor and linkage. The problem is that the adjustment nut
>>> for this limiter (similar to a clutch) has rusted solid and I can't
>>> the tension anymore.
>>> My plan is to cut the nut off and use a new one, but I cannot find a
>>> to buy the replacement nut.
>>> It looks very similar to this:
>>> But mine is a slightly different thread pattern and size. I need a 3 1/2
>>> inch nut with 12 tpi. The fastener places can't find one like that for
>>> Does anyone on this list have any ideas where to look?
>>> I can't identify the manufacturer of the torque limiter that I have.
>>> - Pat
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