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SHEET ROLLING PROCEDURE
Determining Length of Material
LENGTH OF MATERIAL necessary to form the desired size circle is the first consideration in
circle forming. To determine the approximate length of material needed use the formula: C = I x
D, Where C is the circumference, I is the value of π or 3.1416, and D is the diameter. For
example, to find the length of material (C or Circumference) to form a 4" diameter circle, multiply
(3.1416 x 4). The result is 12.5664 or the approximate length of material needed. Cut a few
pieces of material to this length for test forming. Material may have to be lengthened or
shortened depending upon results of the test forming run.
Adjusting the Bottom Front Roll
BOTTOM FRONT ROLL adjustment is necessary to secure the piece part between the top and
bottom rolls. To raise or lower the bottom roll, turn the adjusting bolts located at the front of the
machine. Clockwise (cw) for up and counterclockwise (ccw) for down. Insert the material (16ga.
max.) between the rolls from the front of the machine and set the rolls so the material fits snugly.
Make sure the gap along the full length of the rolls is consistent. Now remove the material from
the rolls.
Adjusting the Rear Roll
REAR ROLL adjustment is necessary to set the diameter of the circle to be formed. To raise or
lower the rear roll, turn the adjusting bolts located at the rear of the machine. Clockwise (cw) is
for a smaller diameter and counterclockwise (ccw) is for a larger diameter. Use the scales at
each end of the rear roll to keep the roll gap and formed diameter consistent. If the rolls are not
adjusted exactly parallel, the material will spiral during the rolling process. Because material
springback varies with the kind of material being formed, only by test forming several pieces can
the correct adjustments be made.
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