Bushing Size Calculator

Press Fit Bushing – Hole Size Calculator

"; return; } let s6ToleranceMin, s6ToleranceMax, H7ToleranceMin, H7ToleranceMax; if (units === "metric") { s6ToleranceMin = 0.019; s6ToleranceMax = 0.027; H7ToleranceMin = 0.000; H7ToleranceMax = 0.010; } else if (units === "inch") { s6ToleranceMin = 0.00125; s6ToleranceMax = 0.00155; H7ToleranceMin = -0.00025; H7ToleranceMax = 0.00075; } const actualODMin = nominalOD + s6ToleranceMin; const actualODMax = nominalOD + s6ToleranceMax; const installationHoleMin = nominalOD + H7ToleranceMin; const installationHoleMax = nominalOD + H7ToleranceMax; document.getElementById("result").style.display = 'block'; document.getElementById("result").innerHTML = `
Actual Bushing - MIN: ${actualODMin.toFixed(4)} ${units === "metric" ? "mm" : "in"} (s6)
Actual Bushing - MAX: ${actualODMax.toFixed(4)} ${units === "metric" ? "mm" : "in"} (s6)
Installation Hole - MIN: ${installationHoleMin.toFixed(4)} ${units === "metric" ? "mm" : "in"} (H7)
Installation Hole - MAX: ${installationHoleMax.toFixed(4)} ${units === "metric" ? "mm" : "in"} (H7)
`; }

How to Use the “Press Fit Bushing – Hole Size Calculator”

  1. Select Units:
    • Choose the measurement unit from the “Units” dropdown:
      • Metric (mm): For metric measurements (millimeters).
      • Inch: For imperial measurements (inches).
  2. Enter the Nominal Bushing Outer Diameter (OD):
    • In the “Nominal Bushing OD” input field, enter the outer diameter of the bushing.
    • Make sure to use the same units you selected in the previous step (e.g., if you selected “Metric,” enter the OD in millimeters).
  3. Click the “Calculate Hole Size” Button:
    • Press the “Calculate Hole Size” button to perform the calculations.
  4. View the Results:
    • The calculator will display the calculated values in a results section below the button. The results will include:
      • Actual Bushing OD – MIN and MAX (s6): These are the minimum and maximum calculated values for the actual bushing outer diameter, based on the s6 fit class tolerances.
      • Installation Hole – MIN and MAX (H7): These are the recommended minimum and maximum installation hole sizes for the H7 fit class.

These results indicate the range of dimensions to ensure a proper press fit for the bushing.

When to Use the Calculator:

  • Use this tool when you need to determine the appropriate installation hole size for standard press fit bushings.
  • Ideal for mechanical engineers, machinists, or hobbyists working with press fits in metalworking, reloading, or similar applications.