These dhulka toosanmarshooyin kicin waxa loo isticmaalaa gears cylindrical,Kaas oo iska leh gears spur dibadeed . Waxay ahaayeen kuwo dhulka , saxnaanta sare ISO6-7 .Material :20MnCr5 oo leh kulaylka daaweynta carburizing , engegnaanta waa 58-62HRC . Habka dhulka ayaa ka dhigaya buuq yar oo kordhiya nolosha geers .