Sorbothane® Sheet Stock
2024-11-22
●CUSTOMIZING SHEET STOCK
■Die Cutting: Sheet Stock up to 0.25-inch thick, with or without PSA can be die cut at additional cost. Die cut materials will have a concave edge.
■Water Jet Cutting: Sheet Stock of any thickness can be water jet cut. Water jet cut materials will have a clean edge.
■Gaskets
▲Sorbothane is a popular material for gaskets because of its chemical resistance, conformability to irregular surfaces, low creep and reusability. Its natural tackiness makes it easy to install.
▲Gaskets can be knife-cut, scissor-cut, die cut, molded or water jet cut.
■X-Tra Flex Sheet: X-Tra Flex Sheet is molded with hemispherical bumps. The hemispheres permit the material to flex more easily and allow for soft deformation under load. Overall sheet thickness is approximately 0.185-inch. The hemispheres are approximately 0.09 high and 0.12 diameter. X-Tra Flex sheets are easier to apply to curved and irregular surfaces and provide a softer spring rate.
■Special Sizes, Colors and Thicknesses: The factory can pour special shapes, colors and thicknesses.
●Sheet Stock for Vibration Applications
■In designing your own vibration mounts from sheet stock keep the following in mind:
▲More is not better. A large, lightly loaded sheet will have a high spring rate and will not deflect enough to provide good isolation. Over compression will lead to short service life. The proper compression range is 3 to 20 percent depending on the “Shape Factor.” Shape factor is the ratio of contact surface (one side) divided by perimeter area. See page 5 for calculation of shape factors.
▲Geometry matters. Small circular pieces and rings “bulge” better than squares and rectangles. “Bulgeability” makes for better isolation. Use many small discs rather than a few large rectangles for best vibration isolation performance.
▲Thickness matters. The thicker the sheet, the lower the natural frequency. You need a sheet at least one- inch thick to get your natural frequency down to 10 Hertz. (10 Hertz is your target natural frequency for a 900 RPM motor.)
▲Do not “bolt through” your Sorbothane sheet. The bolt will carry the vibration to the base. Use the natural tackiness of Sorbothane, or apply adhesives to glue the Sorbothane to metal plates on both sides, or consider a custom design with molded-in stud mounts.
▲Use vibration-rated connections. Where bolted connections are used, use high-quality (thread deforming) lock nuts or doubled jam nuts to prevent connections from vibrating loose.
■Die Cutting: Sheet Stock up to 0.25-inch thick, with or without PSA can be die cut at additional cost. Die cut materials will have a concave edge.
■Water Jet Cutting: Sheet Stock of any thickness can be water jet cut. Water jet cut materials will have a clean edge.
■Gaskets
▲Sorbothane is a popular material for gaskets because of its chemical resistance, conformability to irregular surfaces, low creep and reusability. Its natural tackiness makes it easy to install.
▲Gaskets can be knife-cut, scissor-cut, die cut, molded or water jet cut.
■X-Tra Flex Sheet: X-Tra Flex Sheet is molded with hemispherical bumps. The hemispheres permit the material to flex more easily and allow for soft deformation under load. Overall sheet thickness is approximately 0.185-inch. The hemispheres are approximately 0.09 high and 0.12 diameter. X-Tra Flex sheets are easier to apply to curved and irregular surfaces and provide a softer spring rate.
■Special Sizes, Colors and Thicknesses: The factory can pour special shapes, colors and thicknesses.
●Sheet Stock for Vibration Applications
■In designing your own vibration mounts from sheet stock keep the following in mind:
▲More is not better. A large, lightly loaded sheet will have a high spring rate and will not deflect enough to provide good isolation. Over compression will lead to short service life. The proper compression range is 3 to 20 percent depending on the “Shape Factor.” Shape factor is the ratio of contact surface (one side) divided by perimeter area. See page 5 for calculation of shape factors.
▲Geometry matters. Small circular pieces and rings “bulge” better than squares and rectangles. “Bulgeability” makes for better isolation. Use many small discs rather than a few large rectangles for best vibration isolation performance.
▲Thickness matters. The thicker the sheet, the lower the natural frequency. You need a sheet at least one- inch thick to get your natural frequency down to 10 Hertz. (10 Hertz is your target natural frequency for a 900 RPM motor.)
▲Do not “bolt through” your Sorbothane sheet. The bolt will carry the vibration to the base. Use the natural tackiness of Sorbothane, or apply adhesives to glue the Sorbothane to metal plates on both sides, or consider a custom design with molded-in stud mounts.
▲Use vibration-rated connections. Where bolted connections are used, use high-quality (thread deforming) lock nuts or doubled jam nuts to prevent connections from vibrating loose.
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