Manufacturing Description:
Precision Grade: (JIS Grade 7 )DIN 7e50
Material: (SCM440 Chromium Molybdenum Alloy Steel)42CrM04
Type: Helical Rack
Treatment of Teeth: Milled
Hardness: High Frequency.HRC50~55 degree.
Sides Ground: not included.
Right Hand Angle: 19°31'42"
Blackening