Boston Bevel Gears are designed for the transmission of motion and power between two intersecting shafts positioned at a right angle. Bevel Gears are similar to Miter Gears except Bevel Gears are used for 1.5:1 to 6:1 ratios. Straight tooth Bevel Gears are cut with a generated “Coniflex” tooth form providing increased life and quieter operating conditions. Spiral tooth Bevel Gears are better suited for higher speeds and high torque applications. And don’t forget Boston Gear Guaranteed Same Day Shipment program – revolutionary premium free guaranteed same day shipment for in-stock items.Straight/Spiral ToothStraight ToothRatio2:1Product FamilyBevel Gears (Straight & Spiral)Diametrical Pitch10Bore Size0.875Product DescriptionBevel Gear, 10 DP, 20 PA, 2:1 R, 20 Teeth, SteelAltra Master No.30216834MaterialSteel, Hardened TeethMating GearHL155Y-G / 2:1 RatioUPC781711118849Family Id30,016Weight0.801KWY/Setscrew/OtherW/ KWY & SetscrewPitch Diameter2.000Outside Diameter2.240No Of Teeth20Mounting Distance3.125Unit Of MeasureEnglish