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Model T25688 (Mfg. Since 09/13)
-15-
Creating Cylinders
This slip roll can be used to easily and accurately
create cylinders
If you know the diameter of the cylinder you want
to create, use the formula below to calculate the
length of material needed.
C=πD
C=Circumference
(Length of Material Needed)
π=Pi (Approximately 3.142)
D=Diameter
Example: Suppose you want to create a 6" diam-
eter cylinder. You would use the above formula as
follows:
C=πD
C=(3.142) x 6"
C=18.852"
The result of 18.852" indicates that you need to
start with a piece of sheet metal that is approxi-
mately 18.852" in length in order to create a 6"
diameter cylinder.
You can use the slip roll to create a bend with the
correct radius so that the two ends meet, forming
a 6" diameter cylinder (see Figure 18).
18.852" Circumference
Workpiece
6" Dia.
C=D
C=(3.142) x 6"
C=18.852
Figure 18. Calculating circumference example.
Once you have the necessary length workpiece,
follow the steps below to create the cylinder.
Note: The method for creating a specific radius is
a trial-and-error process. Due to the many varia-
tions among metal workpieces, no single position-
ing will create the same curve on all materials. We
recommend using scrap pieces the same dimen-
sions and material as the final workpiece until the
desired curve is achieved.
To create a cylinder:
1. Place the workpiece between the top and
bottom rollers, as shown in Figure 19. Turn
the thickness adjustment knobs to lift the
bottom roller until the workpiece is held snug
between the top and bottom rollers. Be sure
to turn the thickness adjustment knobs equal
amounts.
CW
Figure 19. Raising bottom roller.