backlash mode: MEAN BACKLASH

                                                PINION                     GEAR
    number of teeth:                                19                      127
    teeth ratio:                                              6.684211
    module (mm):                                              1.000000
    addendum modification coefficient:               0.500000         -0.986750
    cutting addendum modification coefficient:       0.430839         -1.055910
    hob tooth thickness increment (mm):              0.000000          0.000000
    standard pressure angle (deg.):                 20.000000         20.000000
    working  pressure angle (deg.):                          18.884446
    standard center distance (mm):                           73.000000
    working  center distance (mm):                           72.500000

    contact ratio@:                                          1.477953
    contact ratio* calculated by involute roll angle:        1.477953

    circular backlash, input value (mm):                      0.100000
    circular backlash, calculated to check (mm):              0.100000
    backlash equation mode: ZERO BACKLASH (gear industrial standard equation)
    PINION and GEAR teeth thinned each for 50% of backlash
    span measurement by caliper (mm):               7.941145          37.958061
    numbers of teeth spanned:                       3                        13
    over pin measurement (mm):                     21.974170         127.278970
    pin diameter (mm):                              1.728000           1.728000

    clearance between pinion top and gear root(mm):           0.319161
    clearance between gear top and pinion root(mm):           0.419161
    clearance between pinion top and hob root(mm):            0.194090
    clearance between gear top and hob root(mm):              0.294090
    effective tooth face width(mm):                          10.000000
    tooth depth or hob cutting depth (mm):           2.305910          2.205910
    circular tooth top thickness (mm):               0.417278          0.873138

    DIN tooth form factor, tip loading:              2.443135          2.495991
         balanced comparison:                        2.443135          2.495991
    AGMA geometry J factor, tip loading:             0.281018          0.262176
         balanced comparison:                        0.281018          0.262176
    AGMA Geometry I factor:                                   0.147635

    diameter of root circle (mm):                   17.361679        122.388180
    diameter of base circle (mm):                   17.854160        119.340963
    diameter of intersection circle (mm):           18.003274        123.328412
    diameter of standard pitch circle (mm):         19.000000        127.000000
    diameter of working pitch circle (mm):          18.869863        126.130137
    diameter of outside circle (mm):                21.973499        126.800000
    diameter of maximum outside circle (mm)
    without hob root interference:                  23.790545        126.993393

    arc angle of approach action (deg.):                     6.498178
    arc angle of recess action (deg.):                      21.505148

    shortest distance between intersection
    and the mating tooth tip:                        0.098520          0.063695

    0.01 interference angle
    GEAR tooth tip access angle to PINION SAP (deg.)          2.122794
    PINION tooth tip access angle to GEAR SAP (deg.)          0.630807

    diameter of LC (mm):                            18.314964        124.123244
    diameter of LPSTC (mm):                         19.142694        124.928481
    diameter of HPSTC (mm):                         20.457434        125.874426
    diameter of HC (mm):                            21.973499        126.800000
    arc angle of 2-pair tooth contact(deg.):        18.111914          2.709656
    arc angle of 1-pair tooth contact(deg.):         9.891411          1.479817
 
    intersection: intersection of root fillet and involute 
    LC: lowest contact point or start of the active profile (SAP)
    LPSTC: lowest  point of single tooth contact
    HPSTC: highest point of single tooth contact
    HC: highest contact point or end of the active profile (EAP)
    When either pinion or gear is undercut distinctly,
    contact ratio@ and contact ratio* could be different from each other.
    Take the smaller value as contact ratio in such a case.