Features ; Usually paired with spur or similar gears, internal gears feature teeth that are located on the inside of the gear. The ability to distribute load with two or more planetary gears makes possible more compact equipment designs. Custom-ordered gears Internal gears Capacity Gear size From module 0.5 to 3 Outer diameter To a diameter of approximately 300 mm Length To about 200 mm. * Nissei can machine gears with specifications other than those listed above. Please contact us for more information.