Thermal expansion of CIP composites

When composites are used in elevated temperatures they expand.
This expansion is seen as a reduction in the bore diameter of a
bearing installed in a housing.
In sizing a bearing we must add additional
clearances to the bore so the shaft will run free at the elevated temperatures.
The following is an example of this calculation.
Series 100 & 200 are used up to 200°F (94°C) continuous.
Above 200°F (94°C), use CIP Series 300.
The coefficients of linear expansion follow.

Linear expansion for Series 100 & 200 = .00006" (.0015mm)/deg over 68°F (20°C)
Linear expansion for Series 300 = .00003" (.0007mm)/deg over 68°F (20°C)

Calculations for bearings operating above 68°F (20°C)
Assume we are using CIP 100 Series material
Assume a bearing running at 200°F (94°C)
Assume a wall thickness on .250 (6.35mm)

Calculate the delta T, or difference between 68°F (20°C) and the 200°F (94°C)
200°F (94°C) minus 68°F (20°C) equals 132° (55°C) of temperature change
The formula to determine additional clearance is:
2 x Wall Thickness x Coefficient x Delta T = Clearance
2 x .250” (6.35mm) x .00006” (.0015mm) x 132°F (56°C) = .0039" (.099mm)