Condition: Thread Size

Key: PD=Pitch Diameter, MD=Major Diameter,
ok = Correct, + = Oversize, - = Undersize

 

1. PD+, MD+ : Blank body may be too large.

2. PD+, MDok : If sharp crests appear, blank body may be too large or thread forms too shallow.

3. PDok, MD+ : Blank body may be too large or thread forms too deep.

4. PDok, MD+ : Blank body may be too small.

5. PD-, MDok : Blank body may be too small or die forms tool deep.

6. PDok, MD- : If crests are sharp or burnished, blank body may be too small or die forms tool shallow.

7. PD+, MD- : Insufficient die squeeze.

8. PD-, MD+ : Overloading of the Dies may be occurring.