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Gear: Categories Type Processing Range Processing Precision Standard Involute Gear Cylindrical Gears Modulus: M0.8----M10 Diameter: Φ10----Φ1000 Grade 5 ------- Grade 9 GB10095—88 (ISO1328---1975) Helical Gears Modulus: M0.8----M10 Diameter: Φ10----Φ1000 Spiral Angle: ß = 0°--- 45° Grade 5 ------- Grade 8 GB10095—88 (ISO1328---1975) Cylindrical Internal Gears Modulus: M1----M6 Diameter: <=Φ400 Grade 7 ------- Grade 9 GB10095—88 (ISO1328---1975) Bevel Gear Straight Bevel Gears Modulus: M1----M8 Diameter: Φ10----Φ600, Spiral Angle: ß = 0° Grade 7 ------- Grade 9 GB11365—89 Spiral Bevel Gears(Gleason System) Modulus: M0.5----M10 Diameter: <=Φ800 Spiral Angle: ß = 0°--- 50° Grade 7 ------- Grade 9 GB11365—89 Hypoid Bevel Gears Modulus:M1----M10 Diameter: <=Φ800 Spiral Angle: ß = 0°--- 50° Grade 7 ------- Grade 9 GB11365—89 Worm Modulus:M1----M8 Φ20---Φ800 Grade 7 ------- Grade 9 GB10089—88 Spline Rectangular Spline, Hole Diameter: Φ20---Φ200 Lenth<=1000 According to drawing Involute Spline Shaft Modulus:M1----M8 Lenth<=1000 According to drawing Chain Wheel Diameter:Φ20---Φ600 1/8 inch-----5/8 inch According to drawing Others 1. turner, miller,planer,grinder According to drawing Heat Treatment: Normalizing, Hardening and tempering, Back fire, Carburized Quenching, high frequency quenching