Description: Module 1.5 PA20 Bore 22mm #1-8 HSS Involute Gear Milling Cutter Specification: Module Number: 1.5 Material: HSS Outer Diameter: 55mm Inside Bore: 22mm Pressure Angle: 20 degree Quantity: 1pc Each of Gear is different: 1#: 12-13 Gear 2#: 14-16 Gear 3#: 17-20 Gear 4#: 21-25 Gear 5#: 26-34 Gear 6#: 34-54 Gear 7#: 55-134 Gear 8#: 135 Gear Features: M1.5 HSS gear milling cutter. Specialty cutting tools designed for milling gears. Available in sets of 8 cutters to suit different numbers of teeth. Sized and proportioned to afford a good cutting range and ample rigidity. Straight form tooth design to suit the involute gear form. Well suited for use in a variety of ferrous and non-ferrous materials. Package included: 1 X HSS Gear Milling Cutter