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Hi Jim, The paraffin oil (or “turbine”
oil) is really for high speed shafts that you don’t want to gum up. If you
have carbon steel thru-hulls welded in already it might be good to switch to
bronze shafts. I agree with Alec though, eventually you may want to replace
those weld fittings with the 316-L. Greg From: owner- Hi Hugh, I appreciate the comments. With the exception of two shafts which are 1
1/4 in diameter, the rest ate 1 inch in diameter. Clearance was originally
about 3 thousandths of an inch, however after welding and reaming I am sure
it's a bit more. This is my own design for the most part, taking what I felt were the
best of several designs and applying it to my plans. These parts and weldments are already built, welded to the hull and
painted, so unless there is a compeling reason I will have to deal with them as
they are. I am thinking of Greg's liquid based parafin oil. Do you feel this
would be better at controlling corrosion in these bores? Most are designed to be easy to dissasemble for maintenance. Best Regards, Jim K On Tue, Feb 2, 2010 at 11:36 PM, Hugh Fulton <hc.fulton@gmail.com> wrote: Hi Jim, Well if you have good clearance and you had the bell crank
galvanized then you wont have any problems but it would be nice to see a cross
section drawing of what you are proposing. Are you following Kittredge
drawings or is this a Jim version. Hard to pass a comment without
understanding the situation but you don’t want them to rust together and
find you cant turn them when you need them. You can get away with a lot
with good maintenance but maybe Vance can say what works best in that situation.
Chs, Hugh From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]
On Behalf Of kocpnt tds.net Subject: Re: [PSUBS-MAILIST] Lubrication
Hi Hugh, These are not
rotating shafts. They are rotating bel cranks which actuate drop weight
latches, front and rear thruster orientation and soft ballast valves. Most only
turn a 40 - 160 degrees. Thank you for any
input. Best Regards, Jim K On Tue, Feb 2,
2010 at 3:25 PM, Hugh Fulton <hc.fulton@gmail.com> wrote: Hi Jim, I would be very careful about steel to steel. What is the
application? What speed are the shafts doing? If you do go steel on steel then you need to have different
hardness and very good grease lubrication. Slow rotation is not so bad but if
you can use bronze, Aluminium, white-metal or plastic sleeves then go for it.
Stainless on bronze no problem, Chs, Hugh From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]
On Behalf Of kocpnt tds.net
Hi All, I've not seen this
before and am hoping for some expereinced people to help. I am doing final
assembly of some rotating shafts. Some are carbon steel inside of carbon steel
and some are Stainless shaft inside of bronze bushings. I am not sure if
never- seize or a good quality urea grease are better or possibly something
that I have not thought of! Thanks in advance, Jim K __________
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