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Preferred Force Shrink Fits Chart ANSI B4.1 Table Calculator

Engineering, Manufacturing Tolerance Limits Fits Charts

This Calculator will determine the preferred size and limit tolerances for a force or shrink fit per ANSI B 4.1.

FN 1Light drive fits are those requiring light assembly pressures, and produce more or less permanent assemblies. They are suitable for thin sections or long fits, or in cast-iron external members.

FN 2Medium drive fits are suitable for ordinary steel parts, or for shrink fits on light sections. They are about the tightest fits that can be used with high-grade cast-iron external members.

FN 3Heavy drive fits are suitable for heavier steel parts or for shrink fits in medium sections.

FN 4 and FN 5Force fits are suitable for parts that can be highly stressed, or for shrink fits where the heavy pressing forces required are impractical.

Other types of fits: See -->Preferred Tolerances & Fits Calculator RC - LT Fits

• RC - Running or Sliding Fits
• LC - Clearance Locational Fits
• LT - Transition Locational Fits
• LN - Interference Locational Fits

Related:

• Preferred Tolerance Limits Fits ANSI B4.1
• Press Fit Design Stresses Calculator
• Preferred Tolerances Metric ISO 286
• General ISO Geometrical Tolerances Per. ISO 2768

NOTE: Maximum Nominal Size Input to Calulator is Ø19.69".

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