[FIGURE 1-2 OMITTED]When the magnetic bearings are energized, the motor and impellers, which are keyed directly to the magnetic shaft, levitate. Permanent-magnetic bearings do the primary work, while digitally controlled electromagnets provide the fine positioning. Four positioning signals per bearing hold the levitated assembly to a tolerance of 0.00002 in. As the levitated assembly moves from the center point, the electromagnets'' intensity is adjusted to correct the position. These adjustments occur 6 million times a minute. The software has been designed to automatically compensate for any out-of-balance condition in the levitated assembly.SHUTDOWNS AND POWER FAILURESWhen the compressor is not running, the shaft assembly rests on graphite-lined, radially located touchdown bearings. The magnetic bearings normally position the rotor in the proper location, preventing contact between the rotor and other metallic surfaces. If the magnetic bearings fail, the touchdown bearings (also known as backup bearings) are used to prevent a compressor failure.

When I suggested this to Linda (while standing out of frying pan range, I should note), she suggested that it would make more sense to dab the cleaning paste onto those spots while I was still wearing the overalls. Using a baseball bat, maybe.When I come out of my shop--even if I''m only walking through on my way to drop off cleaning rags--I wind up with more spot than overall. I''m a stain magnet, plain and simple.Rather than dabbing cleanser on the spots, it would be easier to have one of those sheep-dipping trenches full of cleansing liquid between my shop and the house so I could just wallow and wade through it as a matter of course. Back Saver Forklift Cylinder Handler allows cylinders to be safely removed from a cabinet and placed directly on the back of a forklift truck without manual lifting. Back Saver users simply align the tank with the forklift and use a hand winch to load the cylinder into place; no stressful lifting or positioning is required. The all-welded steel construction of the unit allows it to safely carry three cylinders and and provides a 100-pound lift capacity. Unit rolls on 5-inch casters. H&H Sales, Huntertown, Ind. It used to take four people to put a pickup topper in place or take it off. That many people were not always available. We took a 3/8-inch I-bolt and placed it perfectly in the center in the top of the topper. Then we placed a hand winch on the wall and connected the cable through two pulleys, one directly over the topper.

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