... . 2, Different kinds of gears, worm gears,Module from M1-M8 3, Material ... 2008 CERTIFIED.2, Different kinds of gears, worm gears3, Standard and non-standard4, Material C45 ... 0 degree to 45 degree RH/LH.We can offer you all kinds of gears(spur gear, bevel gear, sprial gear, internal gear ... carbonitriding, carburizing, tempering6) Precision shot peen gear faces and roots to increase load capacity7) ...