[Milsurplus] [Boatanchors] Rusted parts help?

[hwhall at compuserve.com]

The two shafts are steel. I freed one this afternoon. It was the one that had been through the freezer treatment. I tried thinning Liquid Wrench 50-50 with 99 percent alcohol and applying that to the joint while alternately heating with the propane torch, then tapping with a brass sleeve and ballpeen hammer. It looked like fluid was slipping into the joint between heatings, & on occasions the heat boiled the fluid back out of the joint, so some was getting it, even though a lot of the alcohol boiled off. Eventually, the inner shaft began to move with the hammering. Was it something I did or did I just get lucky at last??

The second one on the workbench has not surrendered to the same treatment, though. And it uses some bakelite parts that were brass in the other one, so it will not take the same degree of hammering. For tonight, I've upended it and nearly the whole shaft is suspended in a small jar of Liquid Wrench. Looks like the preponderance of recommendations are for me to go get some Kroil tomorrow.
 

 Wayne
WB4OGM

 

-----Original Message-----
From: WA5CAB--- via Boatanchors <boatanchors at mailman.qth.net>
To: boatanchors <boatanchors at mailman.qth.net>
Sent: Fri, Jun 6, 2014 5:35 pm
Subject: Re: [Boatanchors] [Milsurplus] Rusted parts help?


Wayne,

What are the two shafts made of?  Some of the solutions offered work only 
on specific metals (iron and steel, for example).

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480

In a message dated 06/06/2014 15:35:42 PM Central Daylight Time, 
k2gkk at hotmail.com writes: 
> At 02:21 PM 6/6/2014, hwhall at compuserve.com wrote:
> >One of the WWII restoration projects at the museum is a bunch of large 
> impulse driven (slave) clocks we wish to return to operation (I've gotten a 
> couple running so far) . The problem we have that I hope you all can help 
> solve is that many of the concentric shafts for the minute hand and hour hand 
> are seized (i.e., solid minute hand shaft inside tubular hour shaft). The 
> shafts are concentric for about two inches length, with about 3/8 inch 
> overall outside dia. The two shafts were a very close fit originally and are 
> now pretty solidly stuck.
> >
> >I've tried Liquid Wrench but it doesn't seem to be able to penetrate. 
> I've tried placing the assembly in my zero-deg freezer for a couple days &then 

> hitting the outer hour shaft with a propane flame for several seconds, 
> then tapping on the inner shaft. So far, nothing gives. I can't hammer very 
> hard, the rest of the assembly won't take the abuse.
> >
> >Is there something that penetrates better than Liquid Wrench? If no, then 
> I think my next attack will require packing one end of the inner shaft in 
> dry ice with the flame applied to the outer shaft, in the hope that the 
> reason it failed before was the inner took heat from the outer too quickly.
> >
> >Any other ideas??
> >
> >Thanks!
> >
> >Wayne
> >WB4OGM
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