Both barbed (press-in) and threaded Zerks are common. A left handed
drill bit would assist in removing the still in place piece. Drilling
the hole out, tapping it, and screwing in a new Zerk sounds easy as does
drilling the broken piece and using an EZ-Out and tapping in a press-in
Zerk but... you are likely to get metal shavings in the bearing. How do
you prevent metal debris from getting into the bearing? I think using a
left handed bit to remove the piece left behind and then pressing in a
new Zerk is less likely to put debris in the bearing but if it were me,
I'd consider replacing the bearing. I wouldn't be buying from DXE as
their bearing proices are more than a little more than the bearings csan
be bought for over the counter retail from a number of suppliers.
If a new bearing is not approved then put a strong rare earth magnet on
the drill bit to try to prevent debris from wandering into places it is
not wanted.
Best of luck to you. Oh, the last 2 inch ID bearing in a stout carier
predrilled for mounting equipped with a screw-in Zerk cost less than $20
delivered.
Patrick
On 4/10/2015 12:57 PM, Don W7WLL wrote:
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@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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