This standard specifies standard procedures and
requirements for the detection and classification of
localized overheating on ground surfaces by
chemical etch methods.
Some methods which have been used in the past are
no longer recommended. Specifications should be
changed to use the methods in this standard. These
etching methods are more sensitive to changes in
surface hardness than most hardness testing
methods.
This standard applies to steel parts, such as gears,
shafts, splines and bearings, but is not applicable to
nitrided parts and stainless steels.
NOTE: This process, although at times called “nital
etch”, should not be confused with other processes also
known as “nital etch”.
The surface temper etch procedure is to be performed
after grinding and before additional finishing
operations.
AGMA 2007-C00-2000 history
2000AGMA 2007-C00-2000 Gears -- Surface Temper Etch Inspection After Grinding