4.Pressure Angle(α): 14.5°-45° 5.Accuracy: GB/T6082-2001 Standard Class AA/A/B 6.Specifications(mm): Nominal Pitch Circle Dia.: 50mm ClassA/B ModuleNo. of TeethOutside Dia.Hole Dia.15052.72201.254053.381.53455.041.752955.4922555.402.252255.562.52056.762.751856.9231759.103.251557.533.51458.44 Nominal Pitch Circle Dia.: 75mm ClassAA/A/B ModuleNo. of TeethOutside Dia.Hole Dia.17678.7231.7431.256078.381.55079.041.754379.9923881.402.253482.562.53081.762.752884.4232583.103.252486.783.52286.443.752085.1441986.80 Nominal Pitch Circle Dia.: 100mm ClassAA/A/B ModuleNo. of TeethOutside Dia.Hole Dia.1100102.6231.743(or 44.443)1.2580103.941.568107.141.7558107.62250107.002.2545109.092.540108.362.7536107.86334111.543.2531110.713.529112.083.7527112.35425111.464.522111.78520113.905.519119.68618124.56 Nominal Pitch Circle Dia.: 125mm ClassAA/A/B ModuleNo. of TeethOutside Dia.Hole Dia.431136.8031.743(or 44.443)4.528140.14525140.205.523143.00621143.526.519141.96718145.74816149.92