Re: [bolger] Re: Storing Epoxy
Just bought a couple of the pumps a month or so ago. They are identical,
except there is a spacer inside one of them that keeps it from going down
all the way. Mayber Vince is missing the spacer?
except there is a spacer inside one of them that keeps it from going down
all the way. Mayber Vince is missing the spacer?
----- Original Message -----
From: "proaconstrictor" <proaconstrictor@...>
To: <bolger@yahoogroups.com>
Sent: Tuesday, July 09, 2002 10:38 AM
Subject: [bolger] Re: Storing Epoxy
>
> > think there is practically no blush with the slow hardener. I have
> used
> > the same two Raka pumps (2:1) for over 50 gallons now and the mix is
> > still accurate. I understand that Raka is now shipping only one type
> > pump and you have to count two strokes for the resin and one for the
> > hardener. I don't know why they made this change. Maybe it is more
> accurate.
> >
> > Vince Chew
>
> Just be sure there isn't any way for moron little people to get
> locked in that box. The more interesting the contents, the greatter
> the risk.
>
> I don't know what was on Raka's mind in shipping only the single
> squirt pumps. But here are two thought:
>
> 1) if the pumps were simmilar to those you currently have, to cut one
> down to a 2-1 meatering would require making one of the pumps
> dispense less material, which would slow things down when you want
> fair amounts of epoxy. My own experience is that mistakes are a
> little more likely to happen with their current arrangement, but then
> they happen also when alternating pumps.
>
> 2) If you want 2-1 pumps, all you have to do is install a
> constrictor (check in the box to see if they are shipping it, a C
> shaped piece of plastic tube that fits over the pump shaft). This a
> is a block of wood, indelible marker line, tightly fitting plastic
> tube that limits the travel of the pump head to 1/2 its normal. You
> could limit it to a third, and the other pump to 2/3. This is a
> recognized technique, and would allow you the flexibility of using 2-
> 1, 1-.5, etc.. amount direct from the pump, depending on the most
> comon amount of material you need. For really large jobs, usualy
> measuring is best. And the best measuring is straight to lines on
> stir sticks, not graduations on cups, unless they are high quality
> markings.
>
> If you make your own constrictors, be sure they are half the length
> of travel, not half the length of the round shaft on the pump, unless
> that measurement is the same. An easy way might be to cut something
> that blocks any travel of the pump, and fits between the two bearing
> surfaces when the pump is fully compressed, then cut that marker in
> half, and use it to build your constrictor.
>
> Regardless of what pumping method you use, it is best to test the
> pumps by pumping out equal amounts of liquid into two adjascent cups
> and comparing them. If the amounts are identical, then you pumps are
> safe to go.
>
>
>
> Bolger rules!!!
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01930, Fax: (978) 282-1349
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>
>
>
> think there is practically no blush with the slow hardener. I haveused
> the same two Raka pumps (2:1) for over 50 gallons now and the mix isaccurate.
> still accurate. I understand that Raka is now shipping only one type
> pump and you have to count two strokes for the resin and one for the
> hardener. I don't know why they made this change. Maybe it is more
>Just be sure there isn't any way for moron little people to get
> Vince Chew
locked in that box. The more interesting the contents, the greatter
the risk.
I don't know what was on Raka's mind in shipping only the single
squirt pumps. But here are two thought:
1) if the pumps were simmilar to those you currently have, to cut one
down to a 2-1 meatering would require making one of the pumps
dispense less material, which would slow things down when you want
fair amounts of epoxy. My own experience is that mistakes are a
little more likely to happen with their current arrangement, but then
they happen also when alternating pumps.
2) If you want 2-1 pumps, all you have to do is install a
constrictor (check in the box to see if they are shipping it, a C
shaped piece of plastic tube that fits over the pump shaft). This a
is a block of wood, indelible marker line, tightly fitting plastic
tube that limits the travel of the pump head to 1/2 its normal. You
could limit it to a third, and the other pump to 2/3. This is a
recognized technique, and would allow you the flexibility of using 2-
1, 1-.5, etc.. amount direct from the pump, depending on the most
comon amount of material you need. For really large jobs, usualy
measuring is best. And the best measuring is straight to lines on
stir sticks, not graduations on cups, unless they are high quality
markings.
If you make your own constrictors, be sure they are half the length
of travel, not half the length of the round shaft on the pump, unless
that measurement is the same. An easy way might be to cut something
that blocks any travel of the pump, and fits between the two bearing
surfaces when the pump is fully compressed, then cut that marker in
half, and use it to build your constrictor.
Regardless of what pumping method you use, it is best to test the
pumps by pumping out equal amounts of liquid into two adjascent cups
and comparing them. If the amounts are identical, then you pumps are
safe to go.
I recycled an old refrigerator to store epoxy. I ran a cord up through
the bottom drain hole and wired on a lamp socket w/ a 25w bulb for heat
in cold weather. There were two metal crisper bins which I keep the
epoxy in (to catch the inevitable drips). I store various glues, tints,
and some Raka 10 minute epoxy on the door shelves; and my tongue
depressors, brushes, roller covers, and vinyl gloves are in the top
freezer. I taped an indoor/outdoor thermometer to the door and ran the
sensor inside the fridge. I like my Raka at least 70 degrees for easy
pumping, mixing, and wetting out. I use only the slow hardener because I
hate wasting epoxy that cooks off before I'm done applying it. Also, I
think there is practically no blush with the slow hardener. I have used
the same two Raka pumps (2:1) for over 50 gallons now and the mix is
still accurate. I understand that Raka is now shipping only one type
pump and you have to count two strokes for the resin and one for the
hardener. I don't know why they made this change. Maybe it is more accurate.
Vince Chew
the bottom drain hole and wired on a lamp socket w/ a 25w bulb for heat
in cold weather. There were two metal crisper bins which I keep the
epoxy in (to catch the inevitable drips). I store various glues, tints,
and some Raka 10 minute epoxy on the door shelves; and my tongue
depressors, brushes, roller covers, and vinyl gloves are in the top
freezer. I taped an indoor/outdoor thermometer to the door and ran the
sensor inside the fridge. I like my Raka at least 70 degrees for easy
pumping, mixing, and wetting out. I use only the slow hardener because I
hate wasting epoxy that cooks off before I'm done applying it. Also, I
think there is practically no blush with the slow hardener. I have used
the same two Raka pumps (2:1) for over 50 gallons now and the mix is
still accurate. I understand that Raka is now shipping only one type
pump and you have to count two strokes for the resin and one for the
hardener. I don't know why they made this change. Maybe it is more accurate.
Vince Chew