[TowerTalk] Zerk fitting for MA-40
Patrick Greenlee
patrick_g at windstream.net
Fri Apr 10 15:22:51 EDT 2015
Gerald, there are differences and similarities in ATF products. The
differences are important when using in automatic transmissions with
specific needs. The additive packages are typically for specific
applications. The qualities of ATF that lends them to a component of a
penetrant are shared among all the types of ATF of which I am aware.
Translation: There is no over the counter widely available ATF that
would not work OK as a component of the home brew ATF-acetone mix.
As to left handed holes...
Left handed drills when used to drill out a stuck right handed threaded
fastener are not for making a hole to use for something else. They
drill out the stuck fastener until the drill typically binds and acts as
a handle to use to turn the fastener CCW so it can be backed out and
removed. Alternatively the stuck fastener may loosen up and be easy to
remove. This sometimes happens. Using the LH drill bits in conjunction
with a good penetrating oil such as the 50-50 mix has a fairly high
success history. Sometimes the smaller size LH bits bind and break off.
When this happens drilling the fastener again is nearly impossible as
the center of the hole is filled with hardened metal (the broken bit.)
Sometimes the LH bit is sized to drill out the fastener all the way out
to about half way through the threads (radially.) Then the hole is
drilled oversize and tapped to the larger size.
All this technique is useless if you get too much debris into the
bearing and mess it up. Bearings are built to fairly close tolerances
and chunks of steel getting where they are not wanted can cause problems.
Patrick NJ5G
On 4/10/2015 2:04 PM, TexasRF at aol.com 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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