... , ISO9001:2008 CERTIFIED.2, Different kinds of gears, worm gears3, Standard and non-standard4, Material C45, 40Cr. 42CrMo. GG25,GGG40,GGG45 ... good performance of transmission! Our gear can be standard as per European or American standard or special as per your drawings or samples ... shot peen gear faces and roots to increase load capacity7) Standard: ISO, GB, JIS, DIN, AGMA and non-standard8) Surface ...