Here is a typical problem in clamping force analysis (Figure 29-A). A milling cutter is face milling the top surface of a 1500-lb casting. The cutting force is 1800 lb, and the thrust force is 900 lb. The feed force is assumed to be zero for this analysis. The unknown forces are as follows:
FR = total force from all clamps on right side
FL = total force from all clamps on left side
Rf = horizontal reaction force from the fixed stop
R2 = vertical reaction force from the fixed stop
R3 = vertical reaction force from the right side
N = normal force (FL + FR + 15001b + 9001b)
μ. = coefficient of friction (0.19)
What are the required clamping forces, FR and FL?
Figure 29-A

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Feed direction 1800 lb Cutter 1800 lb 900 lb Part 1500 lb 5 34" FR Ri Fixed stop Ra R2 15 30