工时定额：（同上）T1=1.2min T2=0.3min T3=56min T4=15min T基=135x5/578x0.15x3=2.29min T总1=T1+T2+T3+T4+T基=74.79min 粗镗φ36?0?0.02的内孔：
切削用量： ap=2.1
由表5.3-3得f=0.3mm/r 由表5.3-20得v=110m/min
则n=318v/d=318x110/31=1129r/min 工时定额：（同上）T1=0.8 min T2=0.14 min T3=60 min T4=15 min T基=lz/nfap=100x5/1129x0.3x2.1=0.7min T总2=76.64min 半精镗φ36?0?0.02的内孔：
切削用量：ap=1.5
由表5.3-3得f=0.15mm/r 由表5.3-20 得v=115m/min
则n=318v/d=318x115/33=1108r/min 工时定额：（同上）T1=0.4 min T2=0.07 min T3=60 min T4=15 min T基=lz/nfap=50x5/1108x0.15x1.5=1min T总3=76.47min则T总=227.9min
(4) 粗镗φ62.4、φ62?0.015、φ65、及4X0.5的槽、φ58的内孔、半精镗φ65、φ62?0.015及4X0.5的槽、车出M64X1.5的螺纹时：
切削用量： ap=7
由表5.3-3得f=0.5mm/r 由表5.3-20得v=67m/min
则n=318v/d=318x67/57=374r/min 工时定额：（同上）T1=2.3min T2=0.5min T3=60min T4=15min T基=lz/nfap=145x5/374x0.5x7=0.55min T总1=T1+T2+T3+T4+T基=78.35min
半精镗φ65、φ62?0.015及4X0.5的槽时：
切削用量：ap=1.5
由表5.3-3得f=0.15mm/r 由表5.3-20得v=115m/min
则n=318v/d=318x115/62=590r/min 工时定额：（同上）T1=1.2min T2=0.3min T3=60min T4=15min T基=100x5/590x0.15x1.5=3.77min T总2=80.27min 车出M64X1.5的螺纹：
切削用量：ap=1.6 由表5.3-1得f=1.2mm/r 由表5.3-20得v=70m/min 则n=318v/d=318x70/62=359r/min 工时定额：
T1=0.74min T2=0.07min T3=56min T4=15min
T基= lz/nfap=50X5/359X1.2X1.6=0.36 min T总3=71.83min 则T总=230.45min
(5) 粗铣长度为54的左端面和长度为34.5?0.80的两平面：
切削用量：ap=2.5 由表6.3-2得f=0.25mm/r 由表6.3-21得v=120m/min 则n=318v/d=318x120/112=341r/min
工时定额：由表6.4-1得T2=Lw+L1+L2/vf=50+8+8/120X0.25=2.2 min
由表3.3-7得操作时间为0.5 min 由表3.3-8得测量工件时间为0.24min
T1=1.98min T3=51min T4=15min T基=lz/nfap=300X5/341X0.25X2.5=7.04min T总=75.02min (6) 钻3-φ11的孔：
切削用量：ap=15 由表7.3-1得f=0.6mm/r 由表7.3-11得 v=12m/min n=318v/d=318x12