I have often used barsoap as a screw lube but found it a pain to keep the
surface sufficiently wet to be easy to use. Whe the soap is too dry it
doesn't adhere to the screw, falling off before it is of any use. I once
read that a toilet flange wax ring was useful and happened to find one at
the bottom of one of my 'necessary' boxes. In the past I have used
petroleum jelly and had it migrate to the surface, wrecking the ability to
hold a finish. I am wondering if the wax ring will do the same. What is
your experience with screw lubricants?
You've got it. High-quality facial soaps contain glycerin in good
proportion, just as your K-Y does. They're also pH neutralized, of course.
Pretty friendly stuff that lubes great and evaporates slowly. Might be
enough time to evaporate that soft iron would rust, but plated mild steel or
even harder stuff with phosphate coatings should endure.
C & E wrote:
| I have often used barsoap as a screw lube but found it a pain to
| keep the surface sufficiently wet to be easy to use. Whe the soap
| is too dry it doesn't adhere to the screw, falling off before it is
| of any use. I once read that a toilet flange wax ring was useful
| and happened to find one at the bottom of one of my 'necessary'
| boxes. In the past I have used petroleum jelly and had it migrate
| to the surface, wrecking the ability to hold a finish. I am
| wondering if the wax ring will do the same. What is your
| experience with screw lubricants?
The wax rings are bees' wax and should work well as screw lube.
I heard somewhere that soap promotes rusting of screws - but haven't
seen any first-hand evidence.
DeSoto, Iowa USA
(alkalinity)..(as in base vs acid)
When in contact with even a mild base, raw iron will most certainly
r----> who lines up screws and sprays TopKote all over them. That issupposd to be silicon-free and it sure makes the scews go into oak
without a squeek.
Morris Dovey wrote:
> The wax rings are bees' wax and should work well as screw lube.
Mix bees wax with turps 1:1, in a 1 lb coffee can, then keep covered.
> I heard somewhere that soap promotes rusting of screws - but haven't
> seen any first-hand evidence.
Carbon steel screws suck, IMHO.
The cost of fasteners in a project is so small as a percentage of total
cost that I don't worry about it. I just use S/S.
Soap is hygroscopic, I think it is. It draws water. If you combine
steel screws and oak you have a real mess given a bit of time.
Paste floor wax and beeswax both work well. I've heard that the new
toilet rings are not beeswax, but it's still generally, and cheaply,
available from any beekeeper (around here, it's two or three bucks a
pound, which should last pretty close to a lifetime as a screw
lubricant source. That's uncleaned. Woodcraft carries the cleaned
stuff in half pound blocks for 13 bucks).
Soap may be somewhat hygroscopic, but better examples would be methanol and
ethanol. They absorb water from the air readily. Perhaps the property
you're thinking of is hydrophilic or hydrophobic. Soap molecules have a
hydrophilic (water-preferring) end and a hydrophobic (oil/fat-preferring)
end, which is why it works as it does by cleaning a variety of substances.
Try the experiment - screw some steel screws into an oak board in a
line across the grain. Come back in a year and the soaped one might
not have rusted, but it will have significantly more iron-stain
As one of my major uses of screws is for steel screws holding oak
together at a moisture-expansion joint (under tabletops etc.) I don't
want this happening. So I use candlewax, or sometimes beeswax.
Someone may have a better way than me. I use a vernier to find the screw
minor thread diameter and drill the pilot hole accordingly. When the pilot
hole is not properly sized I wet the screw threads before using the barsoap.
So far by using a quality drill and c'sink bit matched to the right screw
size I was able to manage in maple, oak and cherry without lubrication.
When screwing in hard spots and knots I for sure use bardsoap as lubrication
after wetting the threads of the screw. I have learned by accident that a
drop of carpenter's glue also facilitate the driving of the screws in soft
wood like eastern white pine.
Sun, Feb 11, 2007, 1:33am (EST+5) firstname.lastname@example.org
minor thread diameter and drill the pilot hole accordingly. <snip>
I just hold bits up to the screw to compare until I find a suitable
Only those who have the patience to do simple things perfectly will
acquire the skill to do difficult things easily.
- Johann Von Schiller
I use bar soap quite successfully. I lick the screw before I rub it on the
bar of soap and that holds it to the screw quite well. After while a little
moisture builds up on the soap and this helps too. I restore classic
mahogany boats and hence have inserted 1000's of screws this way.. I find
the soap from hotel/motels works real good!
He got it right in a few threads a few weeks ago, but for some reason
END PART 1
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