Manufacturing Description
Precision Grade: JIS N8
Meterial: S45C (JIS G 3123) 
Type: Helical Rack
Treatment of Teeth: Ground
Hardness: Qucnched HRC18- -20 Degree
Sides Ground: Included
Right Hand Angle: 19°31'42"
Pressure Angle: 20 Degree
Total Pitch Error: 0.1mm/1000mm