Details
Martin BS1030-15 Bevel Gear, 20° Pressure Angle, High Carbon Steel, Inch, 0.570" Face, 3/4" Bore Diameter, 3" Pitch Diameter, 3.08" Outer Diameter, 30 Teeth

For use with its mating bevel gear in the appropriate gear ratio applications
Straight bevel 90 degree mesh transmits mechanical power between perpendicular shafts
Pressure angle of 20 degrees for a lower contact ratio between gears, resulting in higher load capacity than smaller pressure angles
High carbon steel for tensile strength and hardness
Unhardened teeth for applications where hardness and strength are not needed to transmit torque and motion