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As the marketing manager for a power tool company, I''m often asked about the difference between hammer drills and rotary hammers. Buyers want to know why there''s such a price difference between the two, and which tool is best suited for specific applications.I advise users to answer four questions before making the choice: What material will you usually be drilling? electricclutchneargraindrill How large will the holes be? Will you be drilling an occasional hole or for extended periods? Finally, will you only be drilling, or would it also be useful to be able to use the tool in chipping, or hammer-only, electricclutchneargraindrill mode? Wheel sizes range from 4 X 2 in. to 8 X 2 in. with a choice of roller, Delrin, or precision ball bearings. Typical applications include automotive plants, tire plants, food processing, floor scrubbing equipment, and aircraft/aerospace plants. Swivel nylon casters feature thermoplastic rubber tires bonded to a polypropylene wheel center. Double-sealed precision ball bearings in the swivel head and wheel electricclutchneargraindrill hub deliver smooth operation. The casters withstand corrosion and temperatures to 230[degrees]F. They are available in wheel diameters of 100, 125, 150, and 200 mm with load capacities from 100 to 130 kg. They can be ordered with bolt holes, threaded stems, fittings for round or square tubes, fixed pins or plate mountings, and with or without brakes. A line of electrically conductive nylon casters is also available. ©2003 www.electricdrills.net. All rights reserved. |