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Urethane Compression Springs

Urethane Compression Springs

Urethane Compression Springs

Product catalog summary
Overview
Urethane compression springs are designed for environments unsuitable for traditional steel springs due to issues like corrosion, vibration, or magnetism. Available in multiple durometers, they offer various load capacities and are ideal for applications such as vibration dampening, corrosive environments, high loads in confined spaces, cycle and static loading, and nonmagnetic requirements.
Material Specifications
These springs are made from urethane rubber with durometers of 60A, 80A, 90A, and 95A. The material provides optimal spring characteristics, including water and oil resistance, non-magnetic properties, and a 360-degree contact area. They can be bonded to mating parts and stacked for additional deflection using spacers.
Loading Applications
Urethane is non-compressible, and load is achieved by the bulging of the tube walls, primarily to the outside diameter. The outside diameter growth is approximately equal to the percentage of spring deflection. For instance, a 25mm spring deflected by 0.5mm or 20% will increase its outside diameter by 20%. This expansion should be considered when selecting outside diameter clearances. Load-deflection curves for 95A durometers are not provided due to high spring rates, and 95A is recommended for cushioning applications only.
Inside Diameters
Urethane springs can be guided through the inside diameter by a rod, which can be sized for an interference fit or reduced for a free fit.
Properties
  • Water and oil resistant
  • Non-magnetic
  • 360-degree contact area
  • Bondable to mating parts
  • Can be mated to soft materials
  • Series stackable for additional deflection with spacers
Data Tables and Graphs
The document includes data tables listing part numbers, inside and outside diameters, durometers, and load data. Graphs illustrate the load-deflection characteristics for various durometers and sizes, showing spring behavior under different deflection levels.
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Catalog excerpts

Urethane Compression Springs-1

URETHANE COMPRESSION SPRINGS RESSORTS DE COMPRESSION EN URETHANE Stock sizes in multiple durometers Dimensions standard en duromètres multiples Les ressorts de compression uréthane SPEC standard sont conçus pour compléter nos applications à fils d'acier où la corrosion, les vibrations et le magnétisme interdisent l'utilisation de ressorts en acier traditionnel. La ligne SPEC de ressorts en uréthane comprend des duromètres multiples. Cela permet d'obtenir des capacités de charge diverses dans chaque taille spécifique. Les ressorts en uréthane SPEC sont composés spécialement pour offrir des caractéristiques d'élasticité optimisées. Les applications types comprennent l'amortissement des vibrations, les environnements corrosifs, les charges élevées dans des endroits confinés, les charges cycliques et statiques et les besoins non magnétiques. Associated Spring Stock Urethane compression springs are designed to complement our steel wire applications where corrosion, vibration and magnetism prevent the use of a conventional steel spring. The SPEC line of urethane springs feature multiple durometers. This allows various load capacities within each specific size. SPEC urethane springs are compounded specially for optimized spring characteristics. Typical applications include vibration dampening, corrosive environments, high loads in confined spaces, cycle and static loading and nonmagnetic requirements. Material Urethane rubber Durometers of 60A, 80A, 90A, 95A. SPEC urethane is compounded to provide optimum spring characteristics. Loading Applications Urethane is a non-compressible material. The load of urethane spring is obtained by bulging of the tube walls. Most of the bulging is to the outside diameter. The growth in outside diameter is approximately equal to the percentage of spring deflection. Example: a 25mm spring is deflected .5mm or 20%. Increase the outside diameter by 20%. A spring with an initial outside diameter 19mm would bulge to 23mm. This expansion should be considered when selecting O.D. clearances. Note: Load data shown is from laboratory testing. Load-deflection curves for 95A durometers are not provided due to extremely high spring rates. 95A durometer is recommended for cushioning applications only. Inside Diameters Urethane springs can be guided through the I.D. by a rod. The rod can be that of the size listed in the data tables for an interference fit whereby the spring I.D. grips the rod. Or, the rod can be reduced for a free fit. Properties Matériau Duromètres caoutchouc uréthane de 60A, 80A, 90A et 95A. L'uréthane SPEC est composée pour offrir des caractéristiques d'élasticité optimales. Applications de charge L'uréthane est un matériau incompressible. La charge du ressort en uréthane est obtenue par le renflement des parois du tube. La plus grande partie du renflement se fait vers l'extérieur. L'augmentation du diamètre extérieur est à peu près égale au pourcentage de flexion du ressort. Par exemple, un ressort de 25 mm est fléchi de 5 mm ou 20%. Cela augmente le diamètre extérieur de 20%. Un ressort dont le diamètre extérieur initial est de 19 mm passera à 23 mm. Il convient de tenir compte de cette expansion lors de la sélection des jeux au diamètre extérieur. Note: les données de charge indiquées proviennent d'essais en laboratoire. Les courbes de charge-deflexion pour des duromètres 95A ne sont pas fournies en raison de taux d'élasticité très élevés. Le duromètre 95A est seulement recommandé pour des applications d'amortissement. – Can be mated to soft materials. Diamètres intérieurs Les ressorts en uréthane peuvent être guidés par une tige intérieure. Cette tige peut être aux dimensions indiquées dans les tableaux de données pour obtenir un ajustement serré où la paroi intérieure du ressort serre la tige. Le diamètre de la tige peut être réduit pour donner un ajustement libre. – series stackable for additional deflection with use of spacers. – Water and oil resistant. – Non magnetic. – 360 degree contact area. – Bondable to mating parts. - Résistant à l'eau et à l'huile - Non magnétique - Surface de contact de 360 degrés - Peut être collé aux pièces correspondantes - Peut être combiné à des matériaux tendres - Empilable en série pour assurer une flexion supplémentaire à l'aide d'entretoises Free Length

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Urethane Compression Springs-5

STOCK URETHANE RESSORTS DE COMPRESSION EN COMPRESSION SPRINGS Multiple Durometers URETHANE STANDARD Duromètres multiples

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Urethane Compression Springs-6

STOCK URETHANE RESSORTS DE COMPRESSION EN COMPRESSION SPRINGS Multiple Durometers URETHANE STANDARD Duromètres multiples

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Urethane Compression Springs-7

STOCK URETHANE RESSORTS DE COMPRESSION EN COMPRESSION SPRINGS Multiple Durometers URETHANE STANDARD Duromètres multiples

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Urethane Compression Springs-8

Price Group Price Group Free Length (approx) mm Price Group Free Length (approx) mm Price Group

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