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    You should be able to determine the plastic type from the recycling
    code on the bottom....<br>
    <a href="http://en.wikipedia.org/wiki/Resin_identification_code">http://en.wikipedia.org/wiki/Resin_identification_code</a><br>
    <br>
    Once you know the plastic, you can confidently select a solvent for
    attaching fins... <br>
    Just make sure your fins are of the same material or compatible to
    the solvent...<br>
    <br>
    PVC and ABS solvents are widely available (Canadian Tire)&nbsp; for use
    with pipe....<br>
    <br>
    Michael<br>
    <br>
    <a href="http://krazatchu.ca/">http://krazatchu.ca/</a><br>
    <a href="http://nomidesign.net/">http://nomidesign.net/</a><br>
    <br>
    On 7/3/2011 4:47 PM, Darcy Whyte wrote:
    <blockquote
cite="mid:CAGTEw4y4ahsz95c62tnd8T6dfUWknm6h9v0PEHqrQGWNTv+yzA@mail.gmail.com"
      type="cite"><br clear="all">
      Um, because water is involved, I'm a bit concerned about screwing
      through it.&nbsp;
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        <div>Also, by doing something that interferes with the outside
          roundness of the jar, it might not roll on the tumbler.</div>
        <div><br>
        </div>
        <div>I'm not dismissing it. It sounds better the more I think of
          it but it still requires the right solvent to seal it up...</div>
        <br>
        <br>
        <div class="gmail_quote">On Sun, Jul 3, 2011 at 4:40 PM, mike
          Jans <span dir="ltr">&lt;<a moz-do-not-send="true"
              href="mailto:mjans@live.com">mjans@live.com</a>&gt;</span>
          wrote:<br>
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            padding-left: 1ex;">
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                Do you think the jar is tough enough to screw through?
                If so, you could press the agitators against the inside
                of the drum and screw into them from the outside.<br>
                <br>
                <div>
                  <hr>From: <a moz-do-not-send="true"
                    href="mailto:darcy@siteware.com" target="_blank">darcy@siteware.com</a><br>
                  Date: Sun, 3 Jul 2011 13:24:09 -0400<br>
                  To: <a moz-do-not-send="true"
                    href="mailto:lab@artengine.ca" target="_blank">lab@artengine.ca</a><br>
                  Subject: [Lab] protein jar tumblers
                  <div>
                    <div class="h5"><br>
                      <br>
                      <div>
                        <div>I finally found some empty plastic protein
                          jars to use for my rock tumbling project. They
                          are large (like a gallon) and they have a wide
                          mouth. The plastic is very tough so I think
                          they will be okay as rock tumblers.&nbsp;They may
                          be made of&nbsp;vinyl I'm not sure. &nbsp;</div>
                      </div>
                      <br>
                      <div>Anyways, any ideas of how to install rubs
                        inside them so the rocks don't just slide
                        inside?</div>
                      <div><br>
                      </div>
                      <div>I'm just a little concerned that it will be
                        hard to glue unless I can find the right
                        solvent.</div>
                      <div><br>
                      </div>
                      <div>One thing I thought of is to add a disk
                        underneath the lid. So when you go to add the
                        lid (like a peanut jar lid), you first put down
                        a disk as if it were a seal. The lid would go
                        over top of this disk and hold it in place.&nbsp;</div>
                      <div><br>
                      </div>
                      <div>Then the disk could have some agitators
                        attached to it so that as the&nbsp;assembly&nbsp;turns the
                        agitators rotate inside the container and make
                        sure the stones don't slide.</div>
                      <div><br>
                      </div>
                      <div>Any thoughts?</div>
                      <div><br>
                      </div>
                      <div><a moz-do-not-send="true"
                          href="http://mambohead.com/2011/06/rock-tumbler-first-run/"
                          target="_blank">http://mambohead.com/2011/06/rock-tumbler-first-run/</a></div>
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            <br>
          </blockquote>
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