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> New windmill pump jack, great back-up or alternative ,
New windmill pump jack, great back-up or alternative ,
COMPLETE JACK: The model BB33-H ( for use with an electric motor ) includes the basic pump jack gearcase, 2 - 48" long pitman arms, crossbar assembly, motor mounting base with motor rails, 8" diameter V-pulley w/ 7/8" bore for jack, 2-1/2" diameter V-pulley w/ 5/8" bore for motor, and 34" long V-belt. Electric Motor IS NOT included in price. Electric motor MUST run counter-clockwise as you face the pulley end of motor.
GEAR RATIO & STROKE: Gear ratio is 16 to 1 with a stroke length of 6". Recommended maximum is 40 strokes per minute ( 640 RPM shaft speed )
HELICAL MACHINE-CUT GEARS: Precision worms and gears follow a spiral design for a smooth drive. Worms and gears operate right and left, balancing the load and reducing wear, and are pinned to the shaft to maintain proper timing.
GEARS RUN IN OIL: Oil seals on all shafts retain lubricant and shut out dirt and moisture from individual gear enclosures on each end.
CROSSHEAD COUPLING: Fits 7/16" x 1" flatbar, which must have 12" or more above crosshead for clear operation. Jack gear case can be attached to slightly larger or smaller barrel by carefully shimming and positioning the U-bolt.
LOAD LIMITS: The Dempster Pump Jack should not be used with greater than a 1/2 hp electric motor or a 1-1/2 hp gasoline engine. The speed must not exceed 40 strokes per minute ( 640 RPM shaft speed ) under any circumstances.
Regular list price on this package is $1100 as of 1/1/10 with some retailers selling it for as much as $1285.
