SIZESpecificationtransmissionratioIECEtching Machine 7.5101520253040506080100BoreDiameterofwormshafat2556B149999999993063B5111111111111111163B1456B5999999999956B1499999999994071B5141414141414141471B1463B5111111111111111111111163B1456B599995080B519191919191919----80B1471B5141414141414Tools & Hardware 14141414-71B1463B5-------111111116390B524242424242424----90B1480B519191919191919Assembly Line & Production Line 191919-80B1471B5------141414141471B1475100/112B5282828--------100/112B1490B524242424242424-90B1480B5191919191919191980B1471B51414141490100/112B5282828282828-----100/112B1490B5242424242424242424-90B1480B5191919191980B14110132B538383838---100/112B5282828282828282828100/112B1490B52424242424242480B51919130132B538383838383838---100/112B528282828282828100/112B1490B52424150160B54242424242------132B5383838383838100/112B528282828
worm screw material: 20Cr; ZI teeth; carbonize&quencher heat treatment make the hardness of gear's surface reach to 56-62HRC, retain carburization layer's thickness between 0.3-0.5mm after precise grinding.