Construction Machinery & Attachments worked example

Pin/Bushing Fit Margin with available pin and bushing fit clearance of 0.01 units: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop available pin and bushing fit clearance to 0.01 units, then walk the calculation through step by step. Calculate fit margin between available clearance or interference and required pin/bushing limits.

The inputs for this scenario

  • Available pin/bushing fit clearance: 0.01 units (the input this scenario stresses; the baseline uses 0.02)
  • Required minimum fit clearance: 0.01 units (held at the documented default)
  • Fit margin reference tolerance: 0.02 units (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Fit clearance above requirement = available pin/bushing fit clearance - required minimum fit clearance.
  • pin/bushing fit margin works out to -10 % at these inputs, and this is the headline figure for the scenario.
  • fit clearance above requirement works out to -0 value at these inputs.
  • available pin/bushing fit clearance works out to 0.01 value at these inputs.
  • required minimum fit clearance works out to 0.01 value at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where available pin and bushing fit clearance sits at 0.02 units and the headline result is 30 %, this scenario comes in 133% below the baseline at -10 %.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to available pin and bushing fit clearance, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It only checks the lower bound against the reference; it does not warn you if the available clearance also exceeds the maximum allowable fit and is now too loose.

Results at a glance

  • pin/bushing fit margin: -10 % (headline result)
  • fit clearance above requirement: -0 value
  • available pin/bushing fit clearance: 0.01 value
  • required minimum fit clearance: 0.01 value

Run it with your numbers

  • To rerun this with your own numbers, open the live Pin/Bushing Fit Margin calculator, set available pin and bushing fit clearance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.