Pull-out force and Press fit force – calculation online

Online Calculation - Pull-out force and Press fit force - Cover Image

Basic introduction

What is the Press fit force? [Link]
What is the Pull off force? [Link]

Data impact

  • The height of the plastic bushing (contact height) is directly proportional to [Pull-out force and Press fit force]
  • The friction coefficient is directly proportional to [Pull-out force and Press fit force]
  • The amount of interference is directly proportional to [Pull-out force and Press fit force]
  • The contact height is directly proportional to the [Pull-out force and Press fit force]
  • The contact area is directly proportional to [Pull-out force and Press fit force]
  • The thickness of the plastic shaft lining wall is directly proportional to the [Pull-out force and Press fit force]
  • The metal wall thickness is directly proportional to [Pull-out force and Press fit force] [Small Impact]
  • The strength of the material is directly proportional to the [Pull-out force and Press fit force]

FYI

  1. Calculate with an ideal circle and straight line.
  2. Different factories, the same material, but different strengths. For example, the nylon of factory A will be different from factory B

There are two types of bushing mounting, please choose one

Installed in the hole [for many people]

The bearing inner diameter ID is loose and clearance; OD OD is tight mating and interference fit;
The axis rotates freely individually.

online calculation - Pull-out force and Press fit force - installed in the hole

Mounted to the axis

The inner diameter ID of the bearing is tight mating and interference fit; OD of the outer diameter is loose and clearance;
The shaft rotates with the bushing.

online calculation - Pull-out force and Press fit force - mounted on the shaft

How to calculate the pull-out force & compression force at low temperature?

  1. Find a way to keep the part in a cold environment.
  2. Measure the dimensions and record it.
  3. Fill in the form “Pull-out force & compression force – online calculation” again.

*If the ambient temperature cannot be achieved, the theoretical size can be obtained using “Thermal Expansion and Contraction Size – Online Calculation“.

How to calculate the pull-out force & compression force at high temperature?

  1. Find ways to keep parts in a hot environment, such as an incubator.
  2. Measure the dimensions and record it.
  3. Fill in the form “Pull-out force & compression force – online calculation” again.

*If the ambient temperature cannot be achieved, the theoretical size can be obtained using “Thermal Expansion and Contraction Size – Online Calculation“.

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