[TowerTalk] [Bulk] Anchor Bolts

[Grant Saviers]

Good ideas!  Another - put a dozen nuts on each threaded rod, jam them 
in pairs, spaced on the rod in the epoxy, grade 5 nuts 1.125" x 7 are 
$1.40 ea from McMaster .  The point to point od is just under 2" if my 
trig is correct.

Grant KZ1W


On 10/15/2014 9:52 AM, Wilson wrote:
> You will be mortified by the cost of 2.25" bolts and all that 
> machining. Then you'd have to trim off the hex head.
> It would be a lot cheaper to buy barstock and drill and tap it for his 
> existing bolts.
> But that tap is unusual and hard to use, so maybe using longer stock 
> and threading the top part on a lathe would be the more economical 
> solution.
> You don't have an expensive anchor, so the epoxy would still be needed.
> Come to think of it, how about just making a 2.25" bushing, through 
> which he puts the original size bolt??
> While it's in the lathe, cut aggressive grooves around the outside for 
> lock in of the epoxy.  Cheapest solution...mild steel or stainless 
> fine, possibly from salvage, and minimal skill level.
> Even I could do  it!
> I'd also run a weld bead around the top and bottom of the bushing, 
> where the bolt goes through, to guarantee no movement that could 
> fatigue the epoxy.
> He could machine the hole a hair undersize and do a shrink/press fit 
> to the bolt, but this can be tedious and would add to shop time.
>
> Now that I finally got outside the box, consider a stack of washers, 
> rather than the bushing.
> If he gets washers of two different ODs, they will provide the grooves!
> Run a nut down hard on the stack and it's rigid!
> WL
>
>
>
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> Sent: Wednesday, October 15, 2014 12:00 PM
> To: towertalk at contesting.com
> Subject: TowerTalk Digest, Vol 142, Issue 27
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>   1. Re: Anchor Bolt Material (Jon Pearl - W4ABC)
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> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 15 Oct 2014 11:30:41 -0400
> From: Jon Pearl - W4ABC <jonpearl at tampabay.rr.com>
> To: TexasRF at aol.com, towertalk at contesting.com
> Subject: Re: [TowerTalk] Anchor Bolt Material
> Message-ID: <543E9321.5060101 at tampabay.rr.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> That's exactly what I was thinking, Gerald.
>
> Marvin's greatest constraint is an oversized hole.  I would make a trip
> to a machine shop with some appropriate sized anchor bolts and and have
> the upper threaded portion necked-down!
>
>
>
>
> 73,
>
>
> Jon Pearl - W4ABC
> www.w4abc.com
>
>
> On 10/15/2014 8:03 AM, TexasRF--- via TowerTalk wrote:
>> How about larger anchor bolts with upper six inches or so machined to 
>> fit
>> the base holes?
>>
>> Could the base holes be reamed to a larger size?
>>
>> K5GW
>>
>>
>>
>>
>>
>
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