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Expanded Series Of Constant Force Extension Springs From SDP Offer Wide Variety Of Stock Sizes
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Driven Product Finder & Current Prices
 Constant force extension springs from Stock Drive Products are designed for use in any application requiring a smooth and steady force for retracting or returning, such as in door and drawer closers, clamps, bands and clips. They are also used as magazine feed drives in vending machines and assembly line machinery.
Identified as the A 3X50 Neg'ator® Series, they offer high stress and long deflection which offer significant advantages over conventional coiled springs when used in applications where low or zero gradient is desired, where limited space is a factor, where large extensions are required and where high initial force at initial deflection is desired. The springs feature widths from 3/16" to 2", made of 301 stainless steel and are provided with at least one punched hole in the free end for fastening purposes. The maximum recommended load per spring ranges from .23 lbs. to 40.9 lbs. For current prices, look under Springs at:
http://www.sdp-si.com/eStore/CoverPg/Springs.htm
Detailed technical specifications are contained in Catalog D790, available free upon request from Stock Drive Products, 2101 Jericho Turnpike, Box 5416, New Hyde Park, New York 11042-5416. Phone: 516-328-3300 • Fax: 516-326-8827. Web:
http://www.sdp-si.com
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