HELP FROM EXPERTS ON SOAPSTONE

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I won't bore you with the details of it taking 3 days to turn the pen and two days of finishing and buffing But when I press in the transmission and pen parts in It produced stress cracks on me:eek: and the pen. Anyone have suggestion to prevent this.
 

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prior to pressing, you need to either file down the components or enlarge the opening (I use a dremel with a sanding head on it to sand inside the tube opening, watch your heat levels) so you have a "slip" fit that rewuires little to no pressure for the components to enter the tube. when it's smooth, a a drop of CA and glue it in. been there, done that!
 
You could also use Loctie to secure the fittings to the tube.

But then again rewuires may have to have CA. :laugh:
 
You could also use Loctie to secure the fittings to the tube.

But then again rewuires may have to have CA. :laugh:

+1 on Loctite, as CA can cause some white residue on the plating when the CA out gasses. Plus as a benefit, with a little heat loctite can be loosened to help disassemble parts should you need to.
 
I won't bore you with the details of it taking 3 days to turn the pen and two days of finishing and buffing But when I press in the transmission and pen parts in It produced stress cracks on me:eek: and the pen. Anyone have suggestion to prevent this.

Be careful with soapstone turning. I hear it is loaded with asbestos fibers.
be sure to wear a mask.
 
prior to pressing, you need to either file down the components or enlarge the opening (I use a dremel with a sanding head on it to sand inside the tube opening, watch your heat levels) so you have a "slip" fit that rewuires little to no pressure for the components to enter the tube. when it's smooth, a a drop of CA and glue it in. been there, done that!
I do the same thing a little differently. I press the parts into the tube and knock them back out again before gluing the tube into the blank. That way, the tube is pre-expanded and won't put extra radial force on the blank. If I'm still worried (because brass tubes are slightly elastic), I'll sand down the fittings until they are slip-fit and glue them in when assembling. This technique isn't limited to stone, but anything that might suffer from press-fit expansion (e.g. tru-stone, castings, acrylics, etc.)

I hope that helps,
Eric
 
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