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We have concrete saw information and concrete saws for sale right here. Find all the resources you need using our ttusted concrete saw guide and directory. We have discount concrete saws as well as cheap concrete saws for sale. Look hereI heard that next year, others, including Johnson Controls, will join the ranks of those skipping the increasingly popular show. Surely, those smaller companies that were in attendance must have benefited from the lack of big-company participation.Not many new items were on display, but the beauty of our business is that so many gadgets, ideas and products you''ve probably never even heard of have been in production for years. That''s what I found. Whenever I came across something that interested me and asked if it was new, the answer often came back, "Not really." So, if you are familiar with any of the items I''m writing about and are wondering why I''m listing them as new products, they were new to me! This article describes this new compressor technology and its first use in an ARI-certified chiller design.THE BEARINGSTraditional centrifugal compressors use roller bearings and hydrodynamic bearings, both of which consume power and require oil and a lubrication system. Recently, ceramic roller bearings, which avoid issues related to oil and reduce power consumption, were introduced to the HVAC industry. The lubrication of these bearings is provided by the refrigerant itself. (1)Magnetic-bearing technology is significantly different. A digitally controlled magnetic-bearing system, consisting of both permanent magnets and electromagnets, replaces conventional lubricated bearings. The frictionless compressor shaft is the compressor''s only moving component. It rotates on a levitated magnetic cushion (Figure 1). Magnetic bearings--two radial and one axial--hold the shaft in position (Figure 2). Though light in weight, Airbor magnetic drill has a powerful 1.6-hp air motor and 1,600-lb magnetic holding strength. With its extra rack, stroke length is extended to 10 1/4 in. Annular cutter capacity is up to 2 1/16 in. diam. Geared chuck adapter converts the unit to a standard drill press. The Slugger Air Force pneumatic drill, at 24 lbs, 6 1/4" high, is useful for confined area drilling. The drill''s features include a permanent magnet that turns on or off by air power, a cutter capacity of up to 1 1/16" diameter x 3/4" depth and the ability to use ShortSlugger cutters and frame cutters. These cutters'' geometry allows the operator to drill multi-layered truck frames in a single pass. ©2003 www.concrete-saw.net. All rights reserved. |