HSS m4.25 Gear Hobbing Cutters 1,Information of Gear Cutting Hobs: 1),Module:m4.25,Pressure Angle:PA20 2),Hob use: gear hobs for finishing cut 3),Dimension:OD85xL85xBore27mm 4),Profile to DIN3972,Class A to DIN3968 2,Specifications of Standard Gear Hobber Cutters:module m1~m10,pressure angle:PA20 3,HSS Material for Producing Gear Cutter Hobs:M2,M35,ASP2052,S390+TiN,TiAlN Coating 4,Process of Making Gear Hobbing Cutter Tools: