Boston Gear spur gears are designed to transmit motion and power between parallel shafts. The different styles offered include spur, gear rack, pinion wire, stem pinions, and internal gears, and most come with a selection of bore diameters, keyways, and setscrews to accommodate a wide variety of application requirements. They are available in plastic, non-metallic, brass, steel, and cast iron and are manufactured in a variety of styles, including plain, web, web with lightening holes, and web with spokes. Many are available with or without hubs. Boston Gear manufactures both 14 1/2° and 20° PA, involute, full-depth system gears. While 20° PA is generally recognized as having a higher load-carrying capacity, 14 1/2° PA gears are used extensively because of lower backlash and smoother, quieter operation. Just ask your CSR which is best for you. And remember that spur gears and rack are available via our Guaranteed Same Day Shipment Program.Product FamilySpur GearsDiametrical Pitch8Product DescriptionSpur Gear, 8 DP, 14 1/2 PA, 160 Teeth, Cast IronAltra Master No.30216071Pressure Angle14-1/2 Degree Pressure AngleMaterialCast IronBore Size1.250UPC781711104125Face Width1.250Family Id30,088Weight31.201KeywayNo KWY or SetscrewPitch Diameter20.000Outside Diameter20.250Unit Of MeasureEnglishNo Of Teeth160Hub Diameter3.250Setscrew OtherNo SetscrewTorque Rating3828 @100 RPM MAX