Thanks George. My TB3 got converted to scrap. Not by me.
73, Mike
On Jun 2, 2014, at 12:41 PM, George Dubovsky <n4ua.va@gmail.com> wrote:
> I think I've mentioned it before on this forum, but I converted my TB-3
> thrust bearings over to thrust bushings by machining them to accept inserts
> made from a dry lubricant-loaded composite, Nylatron GSM. No grit-trapping
> grease, no fretting of the race and no routine maintenance required. One has
> been in service since 2005 and one since 2010. From the outside they look
> identical to the stock TB-3. The only negative is that you can not use them
> on a foldover tower where the mast gets inverted occasionally, since there is
> no race of balls to resist "up" force.
>
> Chunks of nylatron (or equivalent) turn up on ebay routinely, but you do need
> access to a small lathe to do the modification.
>
> 73,
>
> geo - n4ua
>
>
> On Mon, Jun 2, 2014 at 12:14 PM, Grant Saviers <grants2@pacbell.net> wrote:
> McMaster has balls in stainless, 304, 316, and 440. 316 isn't the hardest
> but is the most corrosion resistant. They are what I use for rotator
> rebuilds.
>
> If you meant "cratered" which happens when the mast oscillates then it might
> be possible to smooth that out a bit with sandpaper since the bearing is
> pretty crude to start with. Works for rotator races. Adding a couple of
> grease fittings which get a shot of grease every year will also help a lot.
> I like the TFE loaded full synthetic "Super Lube" formerly by Synco, now
> owned by Loctite.
>
> Grant KZ1W
>
> On 6/2/2014 7:20 AM, Charles Gallo wrote:
> Ceramic balls have an issue, they really really don't like jarring loads.
> Their failure mode is to break, vs rust
>
> --
> 73 de KG2V
> Charlie
>
> On Jun 2, 2014, at 10:00 AM, Mike Reublin NF4L <nf4l@comcast.net> wrote:
>
> Does anybody know what size balls are in the Yaesu GS-065 thrust bearing? My
> cheap caliper isn't precise enough. Looks like 3/8". They're rusted and bumpy.
>
> Has anyone had experience with ceramic balls?
>
> The grease is so hard I'm having to soak it off so I can see the races. If
> they're crafted, I'll just replace the whole thing.
>
> 73, Mike NF4L
>
>
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