(14) 齿根角θf θf1 = arctg hf1 Re = 1°47′15″ θf2 = arctg hf2 Re = 3°28′42″ (15) 齿顶角θa θa1 = θf1 = 3°28′42″ θa2 = θf1 = 1°47′15″ (16) 顶锥角δa δa1 = δ1 +θa1 = 21°21′25″ δa2 = δ2 +θa2 = 73°54′32″ (17) 根锥角δf δf1 = δ1 - θf1 = 16°05′28″ δf2 = δ2 - θf2 = 68°38′35″ (18) 外锥高 Ak Ak1 = de2 2 - ha1 ·sinδ1 = 205. 16 mm Ak2 = de1 2 - ha2 ·sinδ2 = 55. 94 mm (19) 安装距 A 具体按结构确定 ,一般凑成整数。 (20) 支承端距 H H1 = A1 - Ak1 H2 = A2