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1'' Bore - 1" Or 2" Stroke Length - 2-640
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Description: The Patented (U.S. Patent #4922805) 1" bore cylinders are made from brass or stainless steel with a clevis style tail. This novel design has the piston rod supported with two composite bushings. One is in the nose and the other is in the tail assembly. These separated bushings adequately support most couples induced by side loads and/or stress reversals and thus minimize stress raisers, a major source of early failure in cylinders. Dynamic lip seals have a U-shaped cross section. These Beswick cylinders are rebuildable, fit most standard mountings, are ideal for long life service applications and do not require a lubricated air supply. The force factor is 0.78 in extension and 0.70 in retraction. They function exceptionally well in linkage applications and can essentially serve as an "extendible link".
Material: 2-640-2 and 2-640-3: Brass body, nose, tail, closure ring, piston, 300 series stainless steel centerless ground piston rod. 2-640-1 and 2-640-4: 300 series stainless steel body, nose, tail, closure ring, centerless ground piston
rod and brass piston. All have composite (self lubricating) bushings.
Seals: Buna-N O-ring and three moly filled Buna-N U-cups.
Note: Replacement seal kit: 2-640-SEAL KIT (customer replaces seals).
Factory Repair Service: 2-640-REPAIR (return cylinder to Beswick factory for replacement of seals and bushings.)
Factory Overhaul Service: 2-640-OVERHAUL (return cylinder to Beswick factory for replacement of seals, bushings and rod/piston assembly).
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