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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
PITCH (MINIMUM MATERIAL) DIAMETER
Upper & lower fingers have tungsten carbide balls of “Best Wire Size”, and give a reading which excludes lead error but not angular errors. PD fingers can be used for right or left hand threads.
FUNCTIONAL (MAXIMUM MATERIAL) DIAMETER
Paired fingers “L” are helically ground for a single PD, pitch/lead combination which will measure the net effect of “all errors”.
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The pitch diameter fingers contain the "best size wire balls" for the pitch they are made . The location of the balls are also dictated by the threads per inch. The smallest thread size diameter we manufacture is a #10 (.190).....................the body of the fingers are too thin otherwise
THE GAGE FRAME REPEATS WITHIN .000050 INCHES
THE ACCURACY DEPENDS ON WHAT YOU SET IT WITH AND THE ENVIRONMENT IT IS USED. SETTING CAN BE ACCOMPLISHED WITH CALIPERS, MICROMETER, GAGE BLIOCKS, OR A PLAIN CYLINDRICAL RING GAGE (CLASS
USERS CHOICE FOR ACCURACY) THE BALLS IN THE FINGERS ARE TUNGSTEN CARBIDE, GRADE 10.
THE BOTTOM FINGER BALLS FLOAT AXIALY TO ELIMINATE AN ERROR CAUSED BY THE LEAD OF THE THREAD
Click below to watch videos
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
- Attached is a quick video I made for you
Explaining how to set the gage for… PD measurement.
https://1drv.ms/v/s!AplWOgE_JxQdhQittIoseU8wWihc?e=wGwPDQ
Click below for information on internal thread inspection
Internal Gage frames, fingers and stands
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
