Springs and Mechanical Reels
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Catalog excerpts

Springs and Mechanical Reels - 1

Stock and custom-designed, spring-powered devices for the design engineer

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Springs and Mechanical Reels - 2

Hunter Spring is the industry leader in design and manufacture of flat coiled springs for the commercial, industrial, medical and military markets. Our flat springs are produced using a variety of materials including 301 stainless steel, high carbon spring steel, Elgiloy, Havar and Inconel. Choose from our spring types shown here, or contact our Application Engineers to assist you in choosing the right spring for your design. Force Output Springs For applications requiring output force (linear travel): NEG’ATOR ® extension springs . . . . . p.4,5 NEG’ATOR motor assemblies. . . . . . p.8,9...

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Springs and Mechanical Reels - 3

Torque Output Springs For applications requiring output Torque (rotational travel): Power spring (torque increases with turns). . . . . . . . . . . . . . . . . . . . . . . p.6 SPIR’ATOR ® spring (torque increases with turns). . . . . . . . . . . . . . . . . . . . . . . p.6 NEG’ATOR constant torque springs. . . . p.7 RW spring (less than 240° travel, high constant torque). . Call Customer Service power springS SPIR’ATOR springs The most commonly used type of flat spring. Since the storage of energy is cumulative, torque output decreases as the spring unwinds. These springs produce relatively...

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Springs and Mechanical Reels - 4

NEG’ATOR® Constant Force Extension Springs for force output The NEG’ATOR Constant Force Spring represents the most basic, yet most versatile, type of constant force springs. It is a prestressed flat strip of spring material which is formed into virtually constant radius coils around itself or on a drum. When deflected, the spring material straightens as it leaves the drum. This straightened length of spring actually stores the spring’s energy through it’s tendency to assume its natural radius. • Low force gradient over entire deflection range • Extremely long linear extensions possible •...

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Springs and Mechanical Reels - 5

Part Number Spec Number FATIGUE LIFE - 2,500 CYCLES MINIMUM FATIGUE LIFE - 13,000 CYCLES MINIMUM SK4D15 FATIGUE LIFE - 20,000 CYCLES MINIMUM SL4D16

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Springs and Mechanical Reels - 6

Custom Power Springs SPIR’ATOR® Prestressed Power Spring Overview The SPIR’ATOR prestressed spiral Power Spring is produced by reverse winding a NEG’ATOR on an arbor and enclosing it in a case. Rotational energy can be obtained from either the arbor or case or, when linear motion is required, through use of a pulley and cable attachment. With torque and deflection being equal, a SPIR’ATOR generally requires 20% less space than a power spring. Torque and the total number of turns are the most important output requirements in a power spring design. The performance of the spring is defined by...

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Springs and Mechanical Reels - 7

NEG’ATOR® Constant Torque Springs for Torque output Design These springs are made of Type 301 high-yield stainless steel and are supplied in coils for mounting on motor drums. Custom designs are available; please contact us and allow our Application Engineers to provide you a design to meet your needs. Features • Long deflections at nearly constant torque; positive or limited negative gradients can be achieved • Minimal intercoil friction and resultant hysteresis as is common in power springs S ENDS OF STOCK B MOTOR SPRINGS ARE FORMED AS "TONGUES" FOR MOUNTING • Provides rotary motion...

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Springs and Mechanical Reels - 8

NEG’ATOR® Motor Assemblies NEG’ATOR Spring Motor assemblies are composed of a single spring mounted on a storage drum and mounted either singularly or in pairs to an output drum with an integral cable. The entire assembly is mounted on a base plate. Stainless steel Zinc-plated steel Zinc-plated steel Type 301 high-yield stainless steel Type 301 high-yield stainless steel Type 301 high-yield stainless steel Ø.015" nylon monofilament (15 lb. test) Ø.024" uncoated stainless steel Ø.031" 3x7 high-yield galv. steel aircraft cable coated to Ø.047" with nylon Diagrams are shown in “right”...

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Springs and Mechanical Reels - 9

Part Number Spec Number Cable Type Ø.015" nylon monofilament (15 lb. test) Ø.024" uncoated stainless steel Ø.024" uncoated stainless steel Ø.024" uncoated stainless steel Ø.031" 3x7 high-yield galv. steel aircraft cable coated to Ø.047" with nylon Ø.024" uncoated stainless steel Ø.031" 3x7 high-yield galv. steel aircraft cable coated to Ø.047" with nylon Ø.031" 3x7 high-yield galv. steel aircraft cable coated to Ø.047" with nylon Ø.031" 3x7 high-yield galv. steel aircraft cable coated to Ø.047" with nylon Ø.031" 3x7 high-yield galv. steel aircraft cable coated to Ø.047" with nylon Ø.031"...

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Springs and Mechanical Reels - 10

Arbor-mounted Reels SPECIFICATIONS SPRING: High-carbon steel CABLE: 7 x 7 construction, preformed galvanized steel with nylon coating CASE: Steel, epoxy powder coated ARBOR: Acetal (POM) Spec Number caBle pull—pounDS Part Number incHeS eXtention Dimensions are in inches. CABLE LENGTH L caBle pull—pounDS incHeS eXtenSion Part Number Thread Size Plated steel Plated steel OPTIONAL MOUNTING ARBOR E F SPRING CLIP (INCLUDED) CLEARANCE FOR MOUNTING ON A D SQUARE SHAFT

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Springs and Mechanical Reels - 11

Base-mounted Reels CABLE: .024" diameter 7x3 stainless steel BASE: Steel, zinc coated DRUM: stainless steel Part Number Spec Number CABLE PULL—POUNDS SPRING: Type 301 stainless steel SPIR’ATOR spring * Nylon coated cable to .034" diameter. Plastic Spring-powered Reels The ML-4575 series utilizes the SPIR’ATOR prestressed power spring. The closed case construction makes the spring unit tamper-proof when mounted. Ring terminal provides customer the ability to secure cables with Velcro®, tie wraps, zip ties, etc. for many cable management applications. • Cable available either coated to .024"...

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Springs and Mechanical Reels - 12

Bracket-mounted Reels SPECIFICATIONS SPRING: High carbon steel SPIR’ATOR spring (except ML-1548 which has power spring) CABLE: 3/32" diameter, galvanized steel, nylon, coated to 1/8" diameter, 126" long CASE AND CABLE REEL: Steel, zinc coated MOUNTING BRACKET: Steel, zinc coated Part Number Spec Number Mounting Type Cable Type Ø3/32" galvanized steel nylon coated to Ø.125 Ø3/32" galvanized steel nylon coated to Ø.125 Ø3/32" galvanized steel nylon coated to Ø.125 CABLE PULL—POUNDS INCHES EXTENTION Due to the wide range of applications our products can be used in, AMETEK Hunter Spring cannot...

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