Precision surface gears are manufactured through the use of abrasive tires to grind a equipment blank to match the desired gear design. These versatile gears are better suitable for use with great instrumentation and other small-scale parts, and in high precision applications.
More accurate finish: Precision Ground Helical Gear Racks ground gears feature a more precise tooth finish than machined or cut gears, which gives better, smoother meshing of equipment teeth for more managed operation.
More material options: While machining, stamping, and other manufacturing procedures may limit materials options, nearly any metal or alloy could be made into a gear via grinding.
Higher loads & better performance: Because of how they’re manufactured, ground gears are generally able to handle higher loads and higher stresses than gears produced via additional means. Floor gears are especially useful in applications that require large amounts of torque.Thanks to these unique advantages, in most applications, precision surface gears can outperform gears produced through other means. Surface gears deliver 
smoother overall performance and greater longevity.
Bevel Gear – Bevel gears, sometimes just known as bevels, are cone shaped gears made to transmit movement among intersecting axes. They are often installed on shafts that are 90 degrees apart, but could be designed for nearly any angle. Another related term you may here’s miter gear, which really is a kind of bevel gear where the mating pairs have the same quantity of teeth.
Ground Gear – Ground gears are produced by the manufacturing process of gear grinding, also known as gear tooth grinding. Gear grinding generates high precision gearing, so floor gears are capable of meeting higher quality requirements (AGMA, DIN, JIS or ISO) than cut gears. Equipment grinding is particularly effective when gears distort through the heat treat procedure and tooth forms no more fulfill drawing requirements. Both spur and helical gears could be produced using this method.
Helical Gear – While the teeth upon spur gears are cut directly and installed parallel to the axis of the gear, the teeth on helical gears are cut and ground on an angle to the facial skin of the gear. This allows the teeth to engage (mesh) more gradually so they operate more efficiently and quietly than spur gears, and will usually carry an increased load. Helical gears are also known as helix gears.