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The current industry standard, these 20° pressure angle gears have thicker, stronger teeth than 14½° pressure angle gears. They're also known as spur gears.
A former industry standard, 14½° pressure angle gears are often found on older machinery.
The current industry standard, gears with a 20° pressure angle have thicker, stronger teeth than gears with a 14½° pressure angle.
Machine your own gears to fit the exact face width and shaft diameter required.