1. Vertical and Horizontal Cutters
FIGURE 24-4 Slab or side milling being done as a up milling process with horizontal spindle-machine.
FIGURE 24-3 Face milling viewed from above with vertical spindle-machine.

2. Milling time analysis Slab milling: Approach distance, A :
A = SQR( d (D-d) )
Time to mill workpiece, Tm:
Tm = (L +2
A)/fr
Face milling:
Allow for over-travel O where A = O:
Full face A = O = D/2
Partial face A = O = w (D – w)
Machining time:
Tm = (L + 2A)/fr

4. Rotation speed of spindle is 350 rev/min, diameter of mill is φ125
 Rotation speed of spindle is 350 rev/min, diameter of mill is φ125. Calculate cutting speed.
(Example) Rotation speed of spindle is 500 min-1, number of mill's teeth is 10, feed speed of worktable is 500mm/min, calculate feed per tooth.

5. ((Example) Feed per tooth is 0
((Example) Feed per tooth is 0.1mm/tooth, number of mill's tooth is 10, feed and rotation speed of spindle is 500 min-1, calculate feed speed of worktable.
(Example) Flat cast iron (FC200) sheet is 100mm wide, 300mm long, diameter of mill isφ200, the number of mill's teeth is 16, cutting speed is 125m/min, feed per tooth is 0.25mm Calculate machining time required (rotation speed of spindle is 200min-1)
(Answer) firstly calculate feed speed of worktable per minute vf=0.25*16*200=800mm/min Then calculate total feed length of worktable L= =500mm, integrate them in the formula,

6. Total feed length of worktable (workpiece length 1 + diameter of mill:D1)
We get the machining time that it needs about 37.5s.

7. Machining time Tm = (L + 2A)/fr Metal removal rate MRR = w d fr
A face milling operation is performed to finish the top surface of a steel rectangular workpiece 12 in. long by 2 in. wide. The milling cutter has 4 teeth (cemented carbide inserts) and is 3 in. in diameter. Cutting conditions are 500 fpm, f = 0.01 in./tooth, and d = in. Determine the time to make one pass across the surface and the metal removal rate during the cut.
Full face A = O = D/2
Machining time Tm = (L + 2A)/fr
Metal removal rate MRR = w d fr
Feedrate in in/min fr = N nt f
N (rpm) = v/(p D)

11. Estimate the machining time that will be required to finish a vertical flat surface of length 100 mm and depth 20 mm by an 8 teeth HSS end mill cutter of 32 mm diameter and 60 mm length in a milling machine. Assume, VC = 30 m/min, fo = 0.12 mm/tooth.

14. Material Removal Rate: MRR= wdfr
D. Material Removal Rate:
Material Removal Rate: MRR= wdfr
Feed rate: Fr = Nntf