Dave here are the specs on the design of the rolling mill.
Sorry I don't have any pictures that really show the detail of the thickness control.
HERE ARE THE SPECS
Hydraulic motor selected is a 104-1028 Char Lynn
@1500 psi it puts out about 1500 in-lbs torque
@ 5GPM that motor turns about 39 RPM, this information is from their specifications
The pump delivers 5 GPM
5 GPM @ 1500 psi = 5 x 1500 /1714/.85 = 5.12 HP
My electric motor on the power unit is a 5 HP
The roll diameter is 3 inches, therefore the circumference is 3.14x 3 = 9.42 inches / revolution
@39 RPM the roll velocity would be 39 x 9.42 /60 = 6.123 inches per second
The drive reduction on the sprockets is 38 teeth/15 teeth = 2.53:1
so the mill velocity is 6.123/ 2.53 = 2.42 inches/ second
The force the roll moves the steel through the mill is:
Motor torque x the reduction divided by the roll radius
= 5000 x 2.53 / 1.5 = 8433 pounds