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 Pitch8Product DescriptionSpiral Miter Gear, 8 DP, 20 PA, 35 Spiral Angle, 1:1 R, 28 TeethAltra Master No.30217038MaterialSteel, Hardened TeethBore Size1.188UPC781711123768Family Id30,067Weight2.801KWY/Setscrew/OtherW/ KWY & SetscrewsPitch Diameter3.500Outside Diameter3.660No Of Teeth28Mounting Distance3.250Torque Rating805 @1800 RPM MaxUnit Of MeasureEnglish