Boston Miter Gears are designed for the transmission of motion and power between two intersecting shafts positioned at a right angle. Miter Gears are similar to Bevel Gears except Miter Gears are used for 1:1 ratios. Straight tooth Miter Gears are cut with a generated “Coniflex” tooth form providing increased life and quieter operating conditions. Spiral tooth Miter 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 ToothSpiral ToothRatio1:1Product FamilyMiter Gear (Straight & Spiral)Diametrical Pitch12Product DescriptionSpiral Miter Gear,12 DP, 20 PA, 35 Spiral Angle, 1:1 R, 15 TeethAltra Master No.30217019MaterialSteel, Hardened, AllBore Size0.500UPC781711123386Family Id30,067Weight0.151KWY/Setscrew/OtherW/ KWY & SetscrewsPitch Diameter1.250Outside Diameter1.360No Of Teeth15Mounting Distance1.250Torque Rating63.0 @1800 RPM MaxUnit Of MeasureEnglish