INVOLUTE SPLINE HOBS ,FlNE PITCH GEAR SHAVING CUTTERS ,Measuring Gears ,DlSK TYPE GEAR SHAPER CUTTERS ,ROLLER Chain SPROCKET HOB GBT51 032004 CIass A.B mm Module 0utside Dia. Overall Length Hole Dia. O.5 45 32 0 75 1 35 40 1.25 50 40 1.5 50 1.75 2 63 63 2.5 3 71 71 32 3.5 4 80 80 5 90 90 6 100 100 - 8 112 112 40 10 125 125 INVOLUTE SPLINE HOBS