Bearing Press Fit Calculations

2023-02-09 17:51:22

This calculates the delfection of the pharmacie-dela-place outer race of a bearing when it is pressed into a housing.

These equations are from Shigley and Mischke “Mechanical Engineering Design” Fifth Ediion p.62-63

Bearing

Housing

Modulus of Elasticity of Inner component (Ei)

30000000

Modulus of Elasticity of Outer component (Eo)

Inner Radius of Inner Component (land radius)(ri)

0.1705

Outer Radius of Outer Component (ro)

Poisson’s Ratio of Inner Component (vi)

0.292

Poission’s Ratio of Outer Component (vo)

Radius at Press (interface) (R)

0.1875

Radial Press (d)

0.0003

Results

Resulting Pressure (p)

2599.551782

Increase in Housing Outer Radius (delta ro)

0.000123797

Decrease in Bearing Inner Radius of OD (delta ri)

0.000176203

Assumptions:

Both members have the same length.

Cross sections are uniform.

Radial interference is constant around the circumference.