| Howell
Magnetic Drive Centrifugal Water Pump
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This is the high
performance water pump I designed for my
"Howell V-Four" engine. Ordinary pumps
have a shaft that enters the case to drive the
impeller. This requires a lubricated shaft seal
to prevent leakage. In miniature sizes it can be
a challenge to have a seal that prevents leaks,
not create excessive friction on the shaft and
be reliable over long periods of time. I
designed this pump to satisfy all these
requirements. There is no shaft that enters the
pump case, so no seal is needed at all. It takes
very little power to turn even at high
water delivery rates. The pump housing internal
has an easy to produce simulated involute spiral
shape with a cutwater for efficient operation
and high delivery. The pump is made almost
entirely of brass. I nickel plated mine for
looks, but that has nothing at all to do with
operation or anything else.
The plans set consists of two sheets of drawings
and one sheet of construction notes.
Specifications: Housing Diameter:
1.125",
Housing Thickness: .490",
Impeller Diameter: .700",
Suction & Discharge,
Port Diameters: .250"
| Materials
Set: (1)
1-1/2" length of 1" dia. delrin rod to
make pump cover, (1) 13/16" x 1/16"
"O" ring cover seal, (2) 1/4" ID
X 3/8" OD ball bearings for drive pulley,
(10) 1/8" dia. rare earth magnets to drive
impeller. Materials Kit
sold separately.
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"What a pleasure to do business with an
honest man, thanks so much for the $10.00
returned. I received the kit in good shape - the
plans arrived today and the drawings are
beautiful. I feel as if I have gone back in time
to a period when quality was important." -
Fred Bruce (Boca Raton, Florida) |
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