All you composite guys. Are any of you using a epoxy mixing pump?
 If so which one and how much did you pay for it?

 I see one on Aircraft Spruce for $266.95.
 Sounds too expensive.

 Paul Lamar


 I've used this one for years....it's a good one.

 http://www.aircraftspruce.com/catalog/cmpages/epoxypump.php

 Sandy McNabb
 Renesis in a Glass Goose

 Can you email a picture of it Sandy? I am curious about
 how it works. What mechanism is used?


 Paul Lamar

You might consider a digital scale as an accurate alternative.
Years ago, for $50 you could get a 7kg/15lb scale with 1g accuracy.
Or a 500g scale with 0.1g accuracy, which is perfect for epoxy batches.
I saw a similar pocket scale a few weeks ago for $15.
 http://www.myweigh.com <http://www.myweigh.com/>
And then you can go crazy measuring everything with high accuracy.
Cheers
Cary


Paul, My pump is from aircraft spruce and is adjustable for ratio.The
less expensive models are pretty much for one particular ratio with
minimal adjustment. If you use a pump you will still need a scale to
calibrate the pump by weight. Just pump into separate wax free paper
cups, weigh the results and then dump the components back into the tank
they came from. New cups for each pumping. I got the scale from
staples  office supply and it is electronic with a digital readout
and very good accuracy.If you are doing continuous layups several times
a day then the pump is good and cleaning not much of a problem if you
keep a couple of drip cups under the spouts. If layups are weeks apart
then the scale  which is covered with a  loose sheat of saran wrap  may
be less trouble. To mix with a scale make a large posterboard  two
column chart with amounts of resin in one column and a second column of
the target combined weight.  Use one of those west system disposable
pumps to weigh the resin then pump in the catalist to the second column
weight.  If you are doing  lot of consecutive little batches and miss
the first target weight you can just go up to the next weight. You have
to hit the combined weight accurately no second chances. Don't weigh in
separate cups and dump them together because the amount wetting the cups
that doesn't pour out will  be different due to the 44/100 ratio and
throw off the mix ratio.

george grimes