Internal and External Thread Inspection

Internal thread inspection and External Thread Inspection Gages.

  • PITCH (MINIMUM MATERIAL) DIAMETER
  • TAPER AND OVALITY
  • INCLUDED ANGLE
  • UNEQUAL HALF-ANGLES
  • MINOR DIAMETER
  • MAJOR DIAMETER Concentricity between major and PD is checked by using inserts “C” and “J”. Major Diameter size, roundness and taper are checked by a pair of “C” inserts.
  • FUNCTIONAL (MAXIMUM) MATERIAL DIAMETER

 

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Click below link for information on Thread inspection of pitch diameter
measuring thread pitch diameter

Internal Thread Inspection:

  • PITCH (MINIMUM MATERIAL) DIAMETER
  • TAPER AND OVALITY
  • INCLUDED ANGLE
  • MINOR DIAMETER
  • MAJOR DIAMETER
  • UNEQUAL HALF ANGLES
  • FUNCTIONAL (MAXIMUM MATERIAL) DIAMETER

Click below for information on internal thread inspection

internal thread inspection

Internal Gage frames, fingers and stands

tapered internal thread gages

Click below charts for Internal thread pitch diameter setting size calculators
Willrich Precision internal UNIFIED & METRIC SETTING SIZE-1
willrich precision internal ID ACME THREAD SETTING SIZE
willrich precision internal BUTTRESS THREAD SETTING SIZE
Willrich Precision internal WHITWORTH THREAD SETTING SIZE

 

External Thread inspection

  • PITCH (MINIMUM MATERIAL) DIAMETER
  • TAPER AND OVALITY
  • INCLUDED ANGLE
  • UNEQUAL HALF-ANGLES
  • MINOR DIAMETER
  • MAJOR DIAMETER Concentricity between major and PD is checked by using inserts “C” and “J”. Major Diameter size, roundness and taper are checked by a pair of “C” inserts.
  • FUNCTIONAL (MAXIMUM) MATERIAL DIAMETER

Click below for information on External Thread Gage Inspection
EXTERNAL THREAD INSPECTION

 

Click below charts for External thread pitch diameter setting size calculators
Willrich Precision OD UNIFIED & METRIC SETTING SIZE
willrich precision O.D. WHITWORTH THREAD SETTING SIZE
willrich precision OD BUTTRESS THREAD SETTING SIZE
Willrich Precision f OD ACME THREAD SETTING SIZE


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