Mike wrote:
> They use a square nut because of the way the nut is held place with vertical
> channel in the casting, so that one does not have to use a wrench to hold
> the nut. A hex not would not work with this type of design and would spin,
> plus you can not fit a wrench in between the channel.
>
After I posted I wondered if it might be something like that. OTOH I
have equipment that uses a recessed hax shape and hex nuts just drop in.
OTOH the Square between reinforcements, or channels is much easier and
cheaper to do, but just as effective. I hope the metal in the rotator
mast clamp is strong and hard enough to keep the hole from getting larger.
73
Roger (K8RI)
> This is not easy to describe, but hopefully you can understand how it works.
>
> Mike, K6BR
>
> -----Original Message-----
> From: towertalk-bounces@contesting.com
> [mailto:towertalk-bounces@contesting.com] On Behalf Of Roger (K8RI)
>
>
>
>
> Tom Menas wrote:
>
>> The pinning bolt on my G2800-series rotor failed and neither the nut nor
>>
> bolt are to be found near the tower.
>
>>
>> Yaesu shipped me the M8 x 95mm socket head cap bolt that I need. But the
>>
> matching M8 metric nut is on backorder (ETA 6 - 8 weeks).
>
>>
>> Does anyone have one or two M8 square nuts that they could sell (or loan
>>
> me until my back order is filled)? Tnx.
>
>>
>>
>>
> My question is, why would any one use a square nut except to save a few
> pennies? We used to call them "farmer bolts" as so much of the stuff
> used in tractors and wagons used square nuts and bolt heads and they
> were always considered "cheap". Of course there may be other reasons for
> "square nuts" other than cheap. I'd put a lock washer on it and go with
> a hex nut. The only duty the nut serves is to keep the bolt in place.
> OTOH the bolt should be of a specific grade (hardness and strength) and
> the proper size, particularly when used as a shear pin.
> Another thing to check when replacing one is the holes. They should
> still be round and a snug fit on the bolt. Ideally a bolt like this
> should fit *tight* in the holes in the mast and rotator.
>
> 73
>
> Roger (K8RI)
>
>
>> 73, Tom, K3WT
>>
>>
>>
>> _______________________________________________
>>
>>
>>
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>>
>>
>>
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