... 2.long life,high speed,high quality 3.NBR co stainless steel carbon steel gear, pinion and rack transmission gearWe can make all kinds ... discussing, program auditing, PC & QC. Material :carbon steel such as C45,20CrMnTi,40Cr,42CrMo or stainless steel or copper or nylon and so on ... on Drawing analysis, Meeting discussing, program auditing, PC & QC. stainless steel carbon steel gear , pinion and rack