Shrink Fit Temperature Calculator

Shrink fit temperature, typically used in metalworking, is the specific temperature at which two components with different coefficients of thermal expansion (CTE) are heated to achieve a tight, interference fit. The exact temperature varies based on the materials involved, but it’s crucial to ensure both components reach the desired fit without compromising their structural integrity.

Shrink Fit Temperature Calculator

Material AMaterial BCTE (10^-6/°C)Shrink Fit Temperature (°C)
SteelSteel12.0Varies depending on application
SteelAluminum12.0150 – 300
SteelBrass12.0250 – 350
AluminumAluminum23.6Varies depending on application
AluminumBrass23.6300 – 450
BrassBrass19.0Varies depending on application
CopperCopper16.5Varies depending on application


  • What temperature is needed for shrink fit? The temperature needed for shrink fit varies depending on the materials and dimensions involved. It typically ranges from a few hundred to a thousand degrees Fahrenheit.
  • What temperature is liquid nitrogen shrink fit? Liquid nitrogen shrink fit involves extremely low temperatures of approximately -196°C (-321°F).
  • How do you calculate a press fit? Press fit calculations consider factors like material properties, diameters of components, and interference to determine the required force or pressure for assembly.
  • What is the formula for interference fit? The formula for interference fit depends on factors such as the diameters of the shaft and hole and the desired interference. One common formula is ΔD = α * (D1 – D2), where ΔD is the interference, α is the interference fit allowance, D1 is the shaft diameter, and D2 is the hole diameter.
  • What temperature is best for shrink wrap? The ideal temperature for heat shrink wrapping varies depending on the type of shrink wrap material. It is typically in the range of 200-300°F (93-149°C).
  • What temperature do you use for shrink plastic? Shrink plastic is often heated at temperatures between 300-350°F (149-177°C) to cause it to shrink and conform to a desired shape.
  • Can you shrink fit with dry ice? Shrink fitting with dry ice is not a common practice; it is typically done using liquid nitrogen due to the extreme cold temperatures required for effective shrink fitting.
  • What temp does nitrogen turn to liquid? Nitrogen turns into a liquid at its boiling point, which is approximately -196°C (-321°F) at standard atmospheric pressure.
  • What are the 3 types of fits? The three common types of fits are clearance fits, interference fits, and transition fits, each having specific allowances for clearances or interferences between mating parts.
  • What are the stresses in shrink fit? Shrink fit induces stresses such as hoop stress and axial stress due to the interference between the mating parts during assembly.
  • How much force is required for press fit? The force required for a press fit depends on factors like material properties, diameters, and the desired interference. Calculations or simulations are typically used to determine the required force.
  • Is press-fit same as shrink fit? Press fit and shrink fit are similar concepts but involve different temperature conditions. Press fit relies on force or pressure for assembly, while shrink fit uses extreme cold to achieve a tight fit.
  • What is interference for shrink fit? Interference in shrink fit refers to the intentional difference in size between mating parts that creates a tight fit when one part is cooled to shrink and then assembled.
  • What is a typical interference fit? Typical interference fits may range from a few thousandths to a few hundredths of an inch (or millimeters), depending on the specific application and materials.
  • How do you calculate shrink wrap? Shrink wrap calculations typically involve estimating the surface area of the object to be wrapped and determining the required size of the shrink wrap material to cover it adequately.
  • What temperature do you heat shrink bags? The recommended temperature for heat-shrinking bags varies depending on the type of bag and its material. It is usually specified by the manufacturer.
  • What temperature is heat shrink adhesive? Heat shrink adhesive activates at different temperatures, typically around 90-120°C (194-248°F), depending on the specific product.
  • Why is my shrink plastic not shrinking? Shrink plastic may not shrink properly due to insufficient heat, improper technique, or using the wrong type of plastic.
  • What temperature and time for Shrinky Dinks? Shrinky Dinks typically shrink at around 325°F (163°C) for 1-3 minutes in a conventional oven.
  • Can you use a heat gun for shrink plastic? Yes, a heat gun can be used for shrinking plastic, but it requires careful control of heat and distance to avoid overheating or distortion.
  • Is anything colder than liquid nitrogen? Yes, liquid helium is colder than liquid nitrogen, with a boiling point of approximately -269°C (-452°F).
  • How do you make liquid nitrogen at home easy? Making liquid nitrogen at home is not easy and typically requires specialized equipment and safety precautions. It involves compressing and cooling nitrogen gas.
  • What happens if you put ice in liquid nitrogen? When ice is placed in liquid nitrogen, it freezes rapidly and becomes extremely brittle.
  • How long does 5lbs of dry ice last? The duration of 5 lbs of dry ice depends on factors like temperature, insulation, and usage. It can last for several hours to a day or more.
  • What happens if you mix dry ice and regular ice? Mixing dry ice and regular ice can cause the regular ice to sublimate faster due to the extremely cold temperatures of dry ice.
  • How long will 8 lbs of dry ice last? The duration of 8 lbs of dry ice varies but can last for a longer period compared to 5 lbs, depending on similar factors.
  • What is the coldest substance on earth? The coldest naturally occurring substance on Earth is liquid helium, with a boiling point close to absolute zero.
  • What is the coldest liquid? Liquid helium is one of the coldest known liquids, with temperatures close to absolute zero.
  • Is nitrogen liquid nitrogen really cold or really hot? Nitrogen in its liquid form (liquid nitrogen) is extremely cold, with temperatures around -196°C (-321°F).

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