[TowerTalk] Zerk fitting for MA-40

Patrick Greenlee patrick_g at windstream.net
Fri Apr 10 15:31:27 EDT 2015


Right again, Chris but you forgot to add a caveat re use south of the 
equator where the Coriolis effect is reversed.

Patrick

On 4/10/2015 2:19 PM, Chris wrote:
> Left handed drills have the battery polarity reversed as well...requires a special charger. :-)  Also don't forget to have a metric crescent wrench available to take out the remains of the zerk fitting when it gets loosened up.
>
> Chris
> KF7P
>
>
>
>
>
>
> On Apr 10, 2015, at 1:04 PM, TexasRF--- via TowerTalk wrote:
>
>> Patrick, assuming ATF means automatic transmission fluid, a wiki search
>> shows there are more than ten different flavors in use. Wonder which one is
>> recommended?
>>
>> On the subject of left handed drill bits: what would the intended use be?
>> Drilling left handed holes? Use with left handed drill motor? Having
>> survived  thus far without needing one I am wondering what I have missed out on.
>> Since  easy out tools are readily available and most likely a lot more robust
>> than left  handed drill bits seems the actual need is not great. Probably
>> less expensive as  well and I see one tool fits several size bolts.
>>
>> Now that it has come to light that drill bits can be used in place of an
>> easy out tool, it seems that there will be no need to buy an easy out tool
>> for  reverse threaded bolts; a regular drill bit will work for that purpose.
>>
>> Yea, it is a slow day here!
>>
>> 73,
>> Gerald K5GW
>>
>>
>>
>> In a message dated 4/10/2015 1:41:01 P.M. Central Daylight Time,
>> patrick_g at windstream.net writes:
>>
>> An  extensive university (I forget which one) engineering department
>> study  tested penetrating oil products like Rust Buster, WD-40, etc.
>> None,  including the expensive ones beat a 50-50 mix of ATF and Acetone.
>>
>> I  mixed up some and have been getting good results.  I recommend you try
>> this mix before you give up on Easy-Outs and their ilk.  Left handed
>> drill bits work in some instances but be careful with the smaller sizes
>> as when they break off they are in the way of trying other  approaches.
>>
>> Good luck to you.
>>
>> Patrick   NJ5G
>>
>> On  4/10/2015 1:14 PM, Gary Schafer wrote:
>>> There are some fittings that  just have small rings around them. They look
>>> like a thread but are  parallel rings. They are made to be driven into a
>>> smooth hole with no  threads.
>>> If you are turning the wrench and it does not unscrew, this  may be what
>> you
>>> have.
>>>
>>> If you have to drill to get the  old one out try a left hand drill bit.
>> Often
>>> the left hand rotation of  the drill bit loosens the thread and unscrews
>> it.
>>> I have never had  much luck with EZ-outs if the threads are rusted.
>>>
>>> 73
>>> Gary  K4FMX
>>>
>>>> -----Original Message-----
>>>> From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf  Of
>>>> Don W7WLL
>>>> Sent: Friday, April 10, 2015 12:57  PM
>>>> To: Towertalk
>>>> Subject: Re: [TowerTalk] Zerk fitting  for MA-40
>>>>
>>>> IMHO, use an EZ-out, inexpensive and work.  I've never seen a Zerk that
>>>> was
>>>> not tapped but surely  could exist. Mine are tapped. Even if you have to
>>>> end
>>>> up drilling it out you can rethread. Just keep the drill size of the
>> EZ-
>>>> Out
>>>> doesn't work less that the tap size specified  for the Zerk thread. Be
>>>> sure
>>>> to THROUGHLY flush out  the fitting hole, don't want any chips or crud
>>>> getting into the  bearing. You can't put to much grease in, you should
>>>> see  it
>>>> oozing out before stopping the  greasing.
>>>>
>>>> Don W7WLL
>>>>
>>>> -----Original Message-----
>>>> From: Kurt Cathcart. KR2C
>>>> Sent: Friday, April 10, 2015 9:26 AM
>>>> To:  towertalk at contesting.com
>>>> Subject: Re: [TowerTalk] Zerk fitting for  MA-40
>>>>
>>>> Good information everybody.  And quick  too!  Thank you.
>>>>
>>>> One more question.   Removing the remains of the Zeck fitting, would
>>>> anybody know if  this is tapped or pressed?
>>>>
>>>> -Kurt
>>>> KR2C
>>>>
>>>>
>>>> On 4/10/2015 11:59 AM, Kurt Cathcart.  KR2C wrote:
>>>>> I have a US Tower MA-40 with the rotator  base.  The last time I
>>>> greased
>>>>> the bearing,  the Zerk fitting broke when I was removing the grease
>>>> gun.
>>>>> Does anybody have an idea of what I should replace it  with?  I got
>>>>> crickets from US  Tower.
>>>>>
>>>>> -Kurt
>>>>> KR2C
>>>>>
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